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An extragalactic planet, also known as an extragalactic exoplanet or an extroplanet, is a star-bound planet or rogue planet located outside of the Milky...

Extragalactic astronomy is the branch of astronomy concerned with objects outside the Milky Way galaxy. In other words, it is the study of all astronomical...

A nebula (Latin for 'cloud, fog'; pl. nebulae or nebulas) is a distinct luminescent part of interstellar medium, which can consist of ionized, neutral...

Extragalactic cosmic rays are very-high-energy particles that flow into the Solar System from beyond the Milky Way galaxy. While at low energies, the...

corresponding to a redshift of 14.32. Part of the JWST Advanced Deep Extragalactic Survey (JADES), this discovery highlights a galaxy significantly more...

Near-UV image of the relativistic jet in 3C 66B Galaxy NGC 3862, an extragalactic jet of material moving at nearly the speed of light can be seen at the...

The Cliff (RUBIES-UDS-154183) is a compact extragalactic object observed as a little red dot with an exceptional (and cliff-like) Balmer jump. It was...

The diffuse extragalactic background radiation (DEBRA) refers to the photon field of extragalactic origin that fills our Universe. It contains photons...

The cosmic distance ladder (also known as the extragalactic distance scale) is the succession of methods by which astronomers determine the distances...

This is a list of star-forming regions in the Milky Way Galaxy and the Local Group. Star formation occurs in molecular clouds, which become unstable to...

The NASA/IPAC Extragalactic Database (NED) is an online astronomical database for astronomers that collates and cross-correlates astronomical information...

The diffuse extragalactic background light (EBL) is all the accumulated radiation in the universe due to star formation processes, plus a contribution...

The Lyon-Meudon Extragalactic Database (LEDA) was a database of galaxies, created in 1983 at the Lyon Observatory. Each galaxy had a number assigned to...

the "VizieR Service". Galaxy types are identified using the NASA/IPAC Extragalactic Database. The other data in these tables are from the SIMBAD Astronomical...

ISBN 0-87279-667-1. "NASA/IPAC Extragalactic Database". Results for NGC 6365. Retrieved 2006-07-12. "NASA/IPAC Extragalactic Database". Results for IC 167...

regular way: FRB 180916 seems to pulse every 16.35 days. Most FRBs are extragalactic, but the first Milky Way FRB was detected by the CHIME radio telescope...

intended to "show no global rotation with respect to a set of distant extragalactic objects". The coordinates are basically the declination and right ascension...

originally[when?] developed to be used in SIMBAD and the NASA/IPAC Extragalactic Database (NED), but it became a de facto standard and is now used more...

1089 is the integer after 1088 and before 1090. It is a square number (33 squared), a nonagonal number, a 32-gonal number, a 364-gonal number, and a centered...

Christopher J. Conselice is an astrophysicist who is Professor of Extragalactic Astronomy at the University of Manchester. Conselice grew up in Neptune...

the "VizieR Service". Galaxy types are identified using the NASA/IPAC Extragalactic Database. The other data of these tables are from the SIMBAD Astronomical...

was known for a wide range of contributions to solar, galactic and extragalactic astrophysics, including the solar neutrino problem, the development...

The BOOMERanG experiment (balloon observations of millimetric extragalactic radiation and geophysics) was an experiment that flew a telescope on a (high-altitude)...

Horizon Telescope, showing the photon ring surrounding its shadow. Extragalactic astronomy interacting spiral galaxies UGC 9618 (also known as VV 340...

2025-12-14 "By Name | NASA/IPAC Extragalactic Database". ned.ipac.caltech.edu. Retrieved 2025-12-14. "By Name | NASA/IPAC Extragalactic Database". ned.ipac.caltech...

BICEP (Background Imaging of Cosmic Extragalactic Polarization) and the Keck Array are a series of cosmic microwave background (CMB) experiments, deployed...

they have been detected more indirectly. Rogue star Rogue planet Rogue extragalactic planets Rogue comet Tidally detached exomoon Stellar black hole Primordial...

Alpha Cygni variables are variable stars which exhibit non-radial pulsations, meaning that some portions of the stellar surface are contracting at the...

University of California Santa Barbara. She is known for her work in extragalactic astrophysics; she works on the formation and evolution of massive galaxies...

to be about 1.5×1053 kg. In November 2018, astronomers reported that extragalactic background light (EBL) amounted to 4×1084 photons. As the universe's...

Several extragalactic recurrent novae have been observed in the Andromeda Galaxy (M31) and the Large Magellanic Cloud. One of these extragalactic novae...

background (CMB) polarization experiment at the South Pole. QUEST (Q and U Extragalactic Sub-mm Telescope) was the original name attributed to the bolometer...

members of the Small Magellanic Cloud are identified using the NASA/IPAC Extragalactic Database. The other data of these tables are from the SIMBAD Astronomical...

The Hubble Space Telescope and the Cosmic Assembly Near-Infrared Deep Extragalactic Legacy Survey. This is a list of galaxies that are well known by something...

the "VizieR Service". Galaxy types are identified using the NASA/IPAC Extragalactic Database. The other data of these tables are from the SIMBAD Astronomical...

the "VizieR Service". Galaxy types are identified using the NASA/IPAC Extragalactic Database. The other data of these tables are from the SIMBAD Astronomical...

Milky Way (the galactic plane) obstruct the view of around 20% of the extragalactic sky at visible wavelengths. As a result, optical galaxy catalogues are...

arXiv:astro-ph/0605321. Dai, Xinyu; Guerras, Eduardo (2018). "Probing Planets in Extragalactic Galaxies Using Quasar Microlensing". The Astrophysical Journal. 853...

Recessional velocity is the rate at which an extragalactic astronomical object recedes (becomes more distant) from an observer as a result of the expansion...

briefly believed to be home to the first discovered planet purportedly of extragalactic origin, orbiting the star HIP 13044. However, further analysis of radial...

astronomer. He played a crucial role in establishing the fields of extragalactic astronomy and observational cosmology. Hubble proved that many objects...

cross-identifications for 73,197 galaxies. It is based on the Lyon-Meudon Extragalactic Database (LEDA), which was originally started in 1983. 40,932 coordinates...

using NIRCam as part of the James Webb Space Telescope Advanced Deep Extragalactic Survey (JADES) program. It has a redshift of about 14.18, making it...

maser in the Milky Way, and extragalactic maser encompasses all masers found outside the Milky Way. Most known extragalactic masers are megamasers, and...

members of the Large Magellanic Cloud are identified using the NASA/IPAC Extragalactic Database. The other data of these tables are from Wolfgang Steinicke's...

the Institute for Computational Cosmology (ICC) and the Centre for Extragalactic Astronomy (CEA) which together along with the CfAI form the Durham Astronomy...

outermost measurement. In parallel, the use of interferometric arrays for extragalactic HI spectroscopy was being developed. Rogstad & Shostak (1972) published...

GRB 250702BDE was a series of three distinct ultra-long extragalactic gamma-ray bursts (GRB) discovered by the Fermi Gamma-ray Space Telescope on July...

Media related to IC 4592 at Wikimedia Commons IC 4592 in NASA/IPAC Extragalactic Database IC 4592 in SIMBAD Database IC 4592 at seds.org NASA Astronomy...

"NASA/IPAC Extragalactic Database". Results for HCG 79. Retrieved 2006-10-29. "NASA/IPAC Extragalactic Database Results for HCG 79". NASA/IPAC Extragalactic Database...

of the Milky Way galaxy and all its contents. This is in contrast to extragalactic astronomy, which is the study of everything outside our galaxy, including...

doi:10.1017/S1743921310009798. "By Name | NASA/IPAC Extragalactic Database". NASA/IPAC Extragalactic Database. Retrieved 2018-12-15. "VSX : Detail for alf...

"NASA/IPAC Extragalactic Database (NED)". ned.ipac.caltech.edu. NASA. 2020. Retrieved 23 May 2023. NED-D: A Master List of Redshift-Independent Extragalactic Distances...

the "VizieR Service". Galaxy types are identified using the NASA/IPAC Extragalactic Database. The other data of these tables are from the SIMBAD Astronomical...

3117". NASA/IPAC Extragalactic Database. NASA and Caltech. Retrieved 1 August 2026. "Distance Results for NGC 3117". NASA/IPAC Extragalactic Database. NASA...

Reuven (July 1992), "The origin of intergalactic magnetic fields due to extragalactic jets", Monthly Notices of the Royal Astronomical Society, 257 (1): 135–151...

September 2017, data from 12 years of observations from PAO supported an extragalactic source (outside of Earth's galaxy) for the origin of extremely high...

the "VizieR Service". Galaxy types are identified using the NASA/IPAC Extragalactic Database. Other data are from the SIMBAD Astronomical Database unless...

designated as Arp 316. "NASA/IPAC Extragalactic Database". Results for HCG 44. Retrieved 2018-03-16. "NASA/IPAC Extragalactic Database". Results for various...

Binney is known principally for his work in theoretical galactic and extragalactic astrophysics, though he has made a number of contributions to areas...

astrophysicist, known for his contributions to observational cosmology and extragalactic astrophysics. He has been a Professor at the Department of Physics of...

defeated Grand Admiral Thrawn by sending himself and Thrawn to the extragalactic planet of Peridea, regarded by many as the Empire's best tactician....

"Reference Lookup | NASA/IPAC Extragalactic Database". ned.ipac.caltech.edu. Retrieved 2025-11-15. "By Name | NASA/IPAC Extragalactic Database". ned.ipac.caltech...

system containing a potential extragalactic planet. M33 X-7, another extragalactic high-mass X-ray binary. Extragalactic planet Circumbinary planet Whirlpool...

New General Catalog and Index Catalog. In some cases, the NASA/IPAC Extragalactic Database was used to confirm cross-identifications of galaxies. The...

Observational Sidewalk Space telescope Celestial subject Galactic / Extragalactic Local system Solar EM methods Radio Submillimetre Infrared (Far-infrared)...

In astronomy, dropout is a radiation source whose radiation intensity falls off sharply above or below a specific wavelength. The source will be easily...

velocity component of the Milky Way's thick disk, rather than having an extragalactic origin. List of stellar streams Necib, Lina; Ostdiek, Bryan; Lisanti...

"NASA/IPAC Extragalactic Database Results for PGC 036733". NASA/IPAC Extragalactic Database. Retrieved July 10, 2026. "NASA/IPAC Extragalactic Database...

The UKIRT Infrared Deep Sky Survey or UKIDSS is an astronomical survey conducted using the WFCAM wide field camera on the United Kingdom Infrared Telescope...

Webb Telescope targeted LRDs in the 'Red Unknowns: Bright Infrared Extragalactic Survey', observing rapid gas orbits of roughly 900 km/s—a strong indicator...

"Results for NGC 6050". NASA/IPAC Extragalactic Database. Retrieved March 13, 2026. "Results for IC 1179". NASA/IPAC Extragalactic Database. Retrieved March 13...

Retrieved 6 November 2008. Loeb, Abraham (2002). "The Long-Term Future of Extragalactic Astronomy". Physical Review D. 65 (4) 047301. arXiv:astro-ph/0107568...

constellation Boötes. 3C 303 is also a radio galaxy It also contains an extragalactic radio source. A clear defined jet is also seen, showing a polarization...

Santa Cruz. SAGES (Study of the Astrophysics of Globular Clusters in Extragalactic Systems) is an international network of researchers investigating the...

Telescope 2004–2005 70′x10′ over 500 Cosmic Assembly Near-infrared Deep Extragalactic Legacy Survey (CANDELS) Hubble Space Telescope 2011 ESO's VLT and the...

Cepheids are important cosmic benchmarks for scaling galactic and extragalactic distances; a strong direct relationship exists between a Cepheid variable's...

formulae are based. Sandage, A. R. (1958). "Current Problems in the Extragalactic Distance Scale". The Astrophysical Journal. 127 (3): 513–526. Bibcode:1958ApJ...

Rubin Observatory imaged the area. List of Messier objects "NASA/IPAC Extragalactic Database", Results for NGC 4472, retrieved September 26, 2006. "Messier...

Rijksuniversiteit Groningen. Retrieved December 30, 2016 – via NASA/IPAC Extragalactic Database. For an extensive discussion of the data and its fit to MOND...

GUSTO (Galactic / Extragalactic ULDB Spectroscopic Terahertz Observatory) is a high-altitude balloon mission that carries an infrared telescope to measure...

allows for near-instantaneous teleportation across both interstellar and extragalactic distances. Some early "portal" appearances in science fiction include...

of NGC objects (7001–7840) "Results for object NGC 7171". NASA/IPAC Extragalactic Database. NASA and Caltech. Retrieved 29 July 2024. "NGC 7171". SIMBAD...

themselves, similar to our own. Kant referred to both the Milky Way and the "extragalactic nebulae" as "island universes", a term still current up to the 1930s...

Fundamental Catalog (FK5) is used to standardize the positions of 23 extragalactic radio sources used to define the International Celestial Reference System...

The Kormendy relation is an empirical scaling relation between the effective radius of a galaxy and its effective surface brightness. It is mainly observed...

near-equatorial orbit. This spacecraft contained four instruments: the Extragalactic Experiment, the Galactic Monitor Experiment, the Scorpio Monitor Experiment...

the Tarantula Nebula of the Large Magellanic Cloud. It is the first extragalactic gamma-ray pulsar discovered. A rotation period of 50.569 milliseconds...

closest star to the Sun. At the other extreme, there is evidence for extragalactic planets – exoplanets located in other galaxies. The discovery of exoplanets...

completing a PhD in astronomy with her dissertation "Investigations of extragalactic hydroxyl". After completing her PhD, Schmelz worked at NASA's Goddard...

David Merritt, A Panchromatic View of Galaxies by Alessandro Boselli, Extragalactic Astronomy and Cosmology : An Introduction by Peter Schneider. and Introduction...

Optical Phenomena apparent during observations of Extragalactic Spacetime phenomena...

Données astronomiques de Strasbourg. Retrieved 2024-05-22. "NASA/IPAC Extragalactic Database (NED) results for object NGC 4814". NASA/IPAC. Retrieved 2024-05-22...

closest such galaxy to Earth. "Results for object NGC 3034". NASA/IPAC Extragalactic Database. Retrieved 27 October 2006. Karachentsev, I. D.; Kashibadze...

National Astronomical Observatory of Japan. His main interests are extragalactic astronomy, especially observational study of active galaxies, and astronomical...

Bruce Slee and Gordon Stanley localized NGC 5128 as one of the first extragalactic radio sources. Five years later, Walter Baade and Rudolph Minkowski...

Mitchell C.; Blandford, Roger D.; Rees, Martin J. (1984), "Theory of extragalactic radio sources", Rev. Mod. Phys., 56 (2): 255–351, Bibcode:1984RvMP....

(number 2). List of NGC objects "Results for object NGC 1582". NASA/IPAC Extragalactic Database. Retrieved 2022-08-16. "WEBDA page for open cluster NGC 1582...

or, more formally, an S0 galaxy. SDSS image of NGC 7600 "NASA/IPAC Extragalactic Database". Results for NGC 7600. Retrieved January 7, 2017. Nemiroff...

"NASA/IPAC Extragalactic Database". Results for NGC 0036. Retrieved 2010-05-04. "Distance Results for NGC 0036". NASA/IPAC Extragalactic Database. Retrieved...

Robert O. Evans, Australian amateur astronomer, discoverer of several extragalactic supernovae MPC · 3032 3033 Holbaek 1984 EJ Holbæk, Denmark, town nearest...

"NASA/IPAC Extragalactic Database". Results for NGC 2541. Retrieved 2006-11-25. "Distance Results for NGC 2541". NASA/IPAC Extragalactic Database. Retrieved...

Observational Sidewalk Space telescope Celestial subject Galactic / Extragalactic Local system Solar EM methods Radio Submillimetre Infrared (Far-infrared)...

active galactic nuclei, galaxy dynamics and scaling relations, the extragalactic distance scale and the expansion rate of the Universe. In her work,...

v t e Extragalactic stars Andromeda Galaxy 3XMM J004232.1+411314 AE Andromedae AF Andromedae M31-2014-DS1 M31 RV PA-99-N2 Large Magellanic Cloud B90 BAT99-7...

of NGC objects (7001–7840) "Results for object NGC 7343". NASA/IPAC Extragalactic Database. NASA and Caltech. Retrieved 7 December 2024. "Your NED Search...

NASA/IPAC Extragalactic Database. NASA and Caltech. Retrieved 22 December 2024. "Distance Results for NGC 4129". NASA/IPAC EXTRAGALACTIC DATABASE. NASA...

object IC 1011, NASA/IPAC Extragalactic Database IC 1011 seds.org IC 1011 seds.org seds.org IC 1011 Vizier IC 1011 NASA Extragalactic Database NGC/IC Portals:...

sources were identified that supported the likelihood of a genuine extragalactic pulsing population. These pulses are known as fast radio bursts (FRBs)...

4475". NASA/IPAC Extragalactic Database. NASA and Caltech. Retrieved 27 August 2025. "Distance Results for NGC 4475". NASA/IPAC Extragalactic Database. NASA...

baryonic matter in the universe. See also cosmic neutrino background and extragalactic background light. The Sunyaev–Zel'dovich effect shows the phenomena...

that the Sun radiates radio waves and localised for the first time an extragalactic radio source in the constellation Cygnus. He was born in 1909 in Nelson...

of NGC objects (7001–7840) "Results for object NGC 7363". NASA/IPAC Extragalactic Database. Retrieved 9 August 2024. Seligman, Courtney. "NGC 7363". Celestial...

highest photon energy measured in electromagnetic radiation emitted by an extragalactic object, the blazar Markarian 501.[needs update] Since the first observation...

Galaxies". NASA. Retrieved 8 January 2014. "NASA/IPAC Extragalactic Database". NASA/IPAC Extragalactic Database (NED). Retrieved March 15, 2012. "The VizieR...

v t e Extragalactic stars Andromeda Galaxy 3XMM J004232.1+411314 AE Andromedae AF Andromedae M31-2014-DS1 M31 RV PA-99-N2 Large Magellanic Cloud B90 BAT99-7...

1885 +5.85 2,500,000 Ipec Andromeda Galaxy First observation of an extragalactic supernova SN 1895B Centaurus 12 December 1895 +8.0 10,900,000 Ia NGC...

données astronomiques de Strasbourg. Retrieved 2021-02-12. "NASA/IPAC Extragalactic Database". Results for 3C 321. Retrieved 2010-04-26. Hautaluoma, Grey;...

Portuguese Alma mater University of Lisbon University of Edinburgh Known for Discovery of Cosmos Redshift 7 Scientific career Fields Extragalactic astronomy...

birth and evolution of galaxies, astronomical instrumentation, and extragalactic astronomy. From 1993 to 1995 Dressler chaired the Association of Universities...

source. "NED Search results for WISEA J085101.70+163857.3". NASA/IPAC Extragalactic Database. Retrieved 2026-08-04. Kozieł-Wierzbowska, Dorota; Goyal, Arti;...

données astronomiques de Strasbourg. Retrieved 3 June 2019. "NASA/IPAC Extragalactic Database". ned.ipac.caltech.edu. Retrieved 3 June 2019. Seligman, Courtney...

radiation, with the attenuation being greater for blue light than for red. extragalactic astronomy The branch of astronomy that studies objects and phenomena...

Group, this value is likely closer to its true distance. The NASA/IPAC Extragalactic Database calculates galaxy diameters using the mean of independent measurements...

Observational Sidewalk Space telescope Celestial subject Galactic / Extragalactic Local system Solar EM methods Radio Submillimetre Infrared (Far-infrared)...

The Faber–Jackson relation provided the first empirical power-law relation between the luminosity L {\displaystyle L} and the central stellar velocity...

NGC 6027e Seyfert's Sextet List of NGC objects (6001–7000) "NASA/IPAC Extragalactic Database". Results for NGC 6027. Retrieved 2007-04-06. "Seyfert's Sextet...

with the extragalactic radio frame to within ±0.6 milliarc-sec at the epoch J1991.25, and non-rotating with respect to distant extragalactic objects to...

Leahy in 1993 and is in use. Extragalactic radio source is common but can lead to confusion, since many other extragalactic objects are detected in radio...

member of the Virgo Cluster. List of NGC objects (4001–5000) "NASA/IPAC Extragalactic Database". Results for NGC 4544. Retrieved 2018-01-07. "parsecs to lightyears...

finite. Thus the observed radiation density (the sky brightness of extragalactic background light) can be independent of finiteness of the universe....

of exactly 1 predicted by Einstein, and at the time the most precise extragalactic test of general relativity. The given distance in the overview of NED...

S2CID 32638647. Rudnick, Lawrence; Brown, Shea; Williams, Liliya R. (2007). "Extragalactic Radio Sources and the WMAP Cold Spot". The Astrophysical Journal. 671...

splinter of Leviathan) and the forces of Chaos. The Tyranids are an extragalactic insectoid race whose sole purpose is to consume all forms of biomatter...

Space Telescope (JWST) during NIRCam imaging for the JWST Advanced Deep Extragalactic Survey (JADES) on 29 September 2022. Spectroscopic observations by JWST's...

The mass–metallicity relation is an observed correlation between the mass of a galaxy and its metallicity, the abundance of chemical elements heavier than...

Observational Sidewalk Space telescope Celestial subject Galactic / Extragalactic Local system Solar EM methods Radio Submillimetre Infrared (Far-infrared)...

Mount Hopkins. Research activities include imaging and spectroscopy of extragalactic, stellar, solar system and extra-solar bodies, as well as gamma-ray...

NGC objects (3001–4000) "NED results for object ARP 187". NASA/IPAC Extragalactic Database. National Aeronautics and Space Administration / Infrared Processing...

of NGC objects (3001–4000) "Results for object NGC 3062". NASA/IPAC Extragalactic Database. NASA and Caltech. Retrieved 1 August 2026. Seligman, Courtney...

Jean-Pierre Macquart; Fronefield Crawford III (2010). "Radio Bursts with Extragalactic Spectral Characteristics Show Terrestrial Origins". The Astrophysical...

In astronomy, the Tully–Fisher relation (TFR) is an empirical relationship between the mass or intrinsic luminosity of a spiral galaxy and its asymptotic...

Award of the German Astronomical Society in recognition of his work on extragalactic globular cluster systems. "AURA selects Kissler-Patig as new Gemini...

analysis of LMC X–2 with XMM/Newton: unveiling the emission process in the extragalactic Z-source" (PDF). Astronomy & Astrophysics. 478: 181–186. Bibcode:2008A&A...

astronomical objects Starburst galaxies Superclusters Voids Related Extragalactic astronomy Galactic astronomy Galactic coordinate system Galactic habitable...

"NASA/IPAC Extragalactic Database". Results for 3C 035. Retrieved 2010-04-22. "NED Classifications for 3C 035". NASA/IPAC EXTRAGALACTIC DATABASE. Retrieved...

.59P. doi:10.1086/527415. "NED Results for Holmberg IX". NASA/IPAC Extragalactic Database. Retrieved 2026-01-18. "Holmberg IX Reveals A One Of A Kind...

objects or phenomena existing within the Solar System, but not on Earth Extragalactic astronomy, the study of objects outside the Milky Way Galaxy Interstellar...

Still-higher-energy neutrinos, resulting from the interactions of extragalactic cosmic rays, could be observed with the Pierre Auger Observatory or...

Institution, concentrating on astrophysical studies including galactic and extragalactic astronomy, cosmology, solar, earth and planetary sciences, theory and...

Astrobiology Astrochemistry Astrometry Astrophysics Cosmochemistry Cosmology Extragalactic astronomy Galactic astronomy Orbital mechanics Physical cosmology Planetary...

In astronomy, the velocity dispersion (σ) is the statistical dispersion of velocities about the mean velocity for a group of astronomical objects, such...

données astronomiques de Strasbourg. Retrieved 2015-12-10. "NASA/IPAC Extragalactic Database". Results for UGC 8335. Retrieved 2015-12-10. Nilson, P. (1973)...

2011-04-20. "NASA/IPAC Extragalactic Database". Retrieved 2018-06-27. "Results for object NGC UGC 1810 (UGC 1810)". NASA/IPAC Extragalactic Database. California...

NGC 2562 NGC 2563 NGC 2569 List of NGC objects (2001-3000) "NASA/IPAC Extragalactic Database (NED) results for object NGC 2563". NASA/IPAC. Retrieved 2024-05-22...

p.187 Bibcode:1941PASP...53..187S Burbidge, E. Margaret The Strange Extragalactic Systems Mayall's Object and IC 883, Astrophysical Journal, vol. 140...

neutrinos detected at the IceCube Neutrino Observatory, possibly of extragalactic origin, were nicknamed "Bert" and "Ernie". The British soap opera EastEnders...

nickname. "Results for object WISEA J000939.34+070449.2". NASA/IPAC Extragalactic Database. NASA and Caltech. Retrieved 9 April 2025. "LEDA 1313424"....

field of astrophysics and completed her Ph.D. in 2012. She works in extragalactic astronomy and her research focuses on understanding the stability and...

BL Lacertae or BL Lac is a highly variable, extragalactic active galactic nucleus (AGN or active galaxy). It was first discovered by Cuno Hoffmeister...

Telescope image of NGC 4414, showing SN 2021J and SN 2023hlf. "NASA/IPAC Extragalactic Database". Results for NGC 4414. Retrieved 22 June 2025. Rand, Richard...

(DLT40) on 1 June 2018. "NED results for object NGC 0274". NASA/IPAC Extragalactic Database. Retrieved September 2, 2016. "New General Catalog Objects:...

Sextet Copeland Septet "NASA/IPAC Extragalactic Database Results for NGC 92 / Robert's Quartet". NASA/IPAC Extragalactic Database. Retrieved July 27, 2026...

8571 Taniguchi 1996 UX Yoshiaki Taniguchi (born 1954) works mainly in extragalactic physics at Tohoku University. He promoted the first mid-infrared deep...

The Virgocentric flow (VCF) is the preferred movement of Local Group galaxies towards the Virgo Cluster caused by its overwhelming gravity, which separates...

have been suggested, such as frequently both VY Canis Majoris and the extragalactic WOH G64 A, which resides within the Large Magellanic Cloud. Direct measurements...

4378". NASA/IPAC Extragalactic Database. NASA and Caltech. Retrieved 23 June 2025. "Distance Results for NGC 4378". NASA/IPAC EXTRAGALACTIC DATABASE. NASA...

and SDSS surveys (and from various observations compiled by the NASA Extragalactic Database), or photo-metrically deduced from the K band (2.2 μm). Blue...

ISSN 2397-3366. S2CID 118647384. Bulik, Tomasz (2007). "Black holes go extragalactic". Nature. 449 (7164): 799–801. doi:10.1038/449799a. PMID 17943114. S2CID 4389109...

published. The publication today specializes in articles on solar physics, extragalactic astronomy, cosmology, geophysics, and instrumentation for these fields...

"NASA/IPAC Extragalactic Database". Results for NGC 5334. Retrieved 2007-04-06. "Distance Results for NGC 5334". NASA/IPAC EXTRAGALACTIC DATABASE. NASA...

Buta (2011, p. 34) Buta (2011, p. 34) "Spiral Structure". NASA/IPAC Extragalactic Database. Caltech. Archived from the original on 2022-10-12. Retrieved...

25 February 2020. "NASA/IPAC Extragalactic Database". Results for NGC 5257. Retrieved 2006-11-22. "NASA/IPAC Extragalactic Database". Results for NGC 5258...

New Astronomy Reviews. 2nd VERITAS Symposium on the Astrophysics of Extragalactic Sources. 48 (5): 345–349. Bibcode:2004NewAR..48..345K. doi:10.1016/j...

Clusters in Extragalactic Systems (SAGES) collaboration, using Hubble images and spectroscopy from the W. M. Keck Observatory to study extragalactic globular...

discipline that deals with the nature of the Universe as a whole. History of extragalactic astronomy – history of the branch of astronomy concerned with objects...

The supergalactic coordinate system is a reference frame for the supercluster of galaxies that contains the Milky Way galaxy, referenced to a local relatively...

intends to use Imperial resources to engage in open warfare with the extragalactic fanatics, the Grysk, before they can invade the galaxy, in the meantime...

(LIRGs). "Results for object ESO 420- G 013 (ESO 420-G 013)". NASA/IPAC Extragalactic Database. Retrieved 27 July 2026. "SIMBAD query result: ESO 420-G 013"...

estimated to be 7.30 M☉. "NED search results for Markarian 478". NASA/IPAC Extragalactic Database. Retrieved 2025-08-10. Gondhalekar, P. M.; Kellett, B. J.;...

4493". NASA/IPAC Extragalactic Database. NASA and Caltech. Retrieved 4 August 2026. "Distance Results for NGC 4493". NASA/IPAC Extragalactic Database. NASA...

University, India. Saikia's research interests are in the fields of extragalactic astronomy, radio astronomy, and education. Along with Vijay Kapahi,...

Tim (17 December 2010). "A Giant Planet Around a Metal-Poor Star of Extragalactic Origin". Science. 330 (6011): 1642–1644. arXiv:1011.6376. Bibcode:2010Sci...

metal-rich globular cluster NGC 6356 "Object No. 1 – NGC 6356". NASA/IPAC extragalactic database. NASA/IPAC. Retrieved 19 October 2015. "Revised NGC Data for...

that the planetary system belongs to the globular cluster Messier 62. Extragalactic Distance Scale Kraken galaxy Leonard-Merritt mass estimator List of...

galactic objects and are concentrated toward our galactic center, where extragalactic objects – such as distant galaxies – are rarely observed there due to...

An astrophysical maser is a naturally occurring source of stimulated spectral line emission, typically in the microwave portion of the electromagnetic...

region falls partly within the Zone of Avoidance, a band of sky in which extragalactic observations are obstructed by stars, dust, and gas in the Milky Way...

telescopes. The telescope was influential in the early detections of extragalactic objects including quasars, astrophysical masers, and Einstein rings...

counterpart of a binary pulsar, the first pulsar in a globular cluster, the extragalactic origin of gamma-ray bursts and the first brown dwarf. JPL · 9804 9807...

the Cygnus OB2 association ionize the nebula's hydrogen. "NASA/IPAC Extragalactic Database". Results for NGC 6914. Archived from the original on December...

publications indexed by Google Scholar McKee, Maggie (September 27, 2007). "Extragalactic radio burst puzzles astronomers". New Scientist. Retrieved September...

v t e Extragalactic stars Andromeda Galaxy 3XMM J004232.1+411314 AE Andromedae AF Andromedae M31-2014-DS1 M31 RV PA-99-N2 Large Magellanic Cloud B90 BAT99-7...

Observational Sidewalk Space telescope Celestial subject Galactic / Extragalactic Local system Solar EM methods Radio Submillimetre Infrared (Far-infrared)...

arXiv:astro-ph/0003148. Bibcode:2000A&A...357..484S. "By Name | NASA/IPAC Extragalactic Database". ned.ipac.caltech.edu. Retrieved 2024-08-03. Media related...

(Ph.D. 1992) Spouse Anne Kugler Children 2 Scientific career Fields extragalactic astronomy MOND dark matter Institutions University of Maryland Case...

and studies have elaborated on the issue and described the diffuse extragalactic background radiation in more detail. Some Vanderbilt astronomers report...

It was discovered on October 28, 1834, by John Herschel. "NASA/IPAC Extragalactic Database". Results for NGC 0215. Retrieved 2016-09-02. "New General...

the extragalactic origin of cosmic rays at the highest energies. This implies that there must be a transition energy from galactic to extragalactic sources...

object IC 1101". NASA/IPAC Extragalactic Database. Retrieved 28 August 2022. "Reference Lookup | NASA/IPAC Extragalactic Database". ned.ipac.caltech...

Center, the Magellanic Clouds, Sco X-1, Cas A, Cygnus Loop, and a few extragalactic sources. The observations were performed in Earth's shadow to eliminate...

"NASA/IPAC Extragalactic Database". Results for object NGC 7317. Retrieved 2007-04-21. "Distance Results for NGC 7317". NASA/IPAC EXTRAGALACTIC DATABASE...

Robert, Carmelle (1997). "A New Luminous Blue Variable in the Giant Extragalactic H II Region NGC 2363". The Astrophysical Journal. 474 (1): L35. Bibcode:1997ApJ...

PKS 1148−001 is classified as a radio-loud quasar and is a variable extragalactic radio source. High-resolution radio observations have revealed compact...

including ArH+, CF+, HCN, HCO+, H2O, NH3, and OH+. As of 2014, it is the "extragalactic object with the largest number of detected molecular species". In 2023...

Brett A. (2022-03-14). "2021 Census of Interstellar, Circumstellar, Extragalactic, Protoplanetary Disk, and Exoplanetary Molecules". The Astrophysical...

the Pinwheel Galaxy "NED results for object MESSIER 101". NASA/IPAC Extragalactic Database. Retrieved 2025-04-27. "Messier 101". SEDS Messier Catalog...

of NGC objects (2001–3000) "Results for object NGC 2890". NASA/IPAC Extragalactic Database. NASA and Caltech. Retrieved 4 August 2024. Celestial Atlas...

Strasbourg. Retrieved 2009-11-28. "Results for NGC 598". NASA/IPAC Extragalactic Database. NASA/IPAC/JPL. Retrieved 2006-12-01. "Your NED Search Results"...

v t e Extragalactic stars Andromeda Galaxy 3XMM J004232.1+411314 AE Andromedae AF Andromedae M31-2014-DS1 M31 RV PA-99-N2 Large Magellanic Cloud B90 BAT99-7...

3913". NASA/IPAC Extragalactic Database. NASA and Caltech. Retrieved 29 March 2025. "Distance Results for NGC 3913". NASA/IPAC EXTRAGALACTIC DATABASE. NASA...

radio sources, such as heretofore unexplained non-repeating, possibly extragalactic, pulses known as fast radio bursts or FRBs. SERENDIP (Search for Extraterrestrial...

Retrieved 2020-05-20. "Results for object NGC 0656 (NGC 656)". NASA/IPAC Extragalactic Database. California Institute of Technology. Retrieved 2020-05-21....

imaged by the James Webb Space Telescope Magellanic Stream "NASA/IPAC Extragalactic Database". Results for Large Magellanic Cloud. Retrieved 29 July 2022...

Eridanus, discovered by Francis Preserved Leavenworth in 1886. "NASA/IPAC Extragalactic Database". Results for NGC 1234. Retrieved 2008-07-18. Seligman, Courtney...

astrochemistry astrobiology, stellar astronomy, galactic astronomy, extragalactic astronomy, and physical cosmology A 32,500-year-old carved ivory mammoth...

position of this object. It is unlikely that CWISE J1249+362 is an extragalactic star, because its motion is confined within the galactic plane, which...

stars can be determined in this case. Since about 1995, measurement of extragalactic eclipsing binaries' fundamental parameters has become possible with...

lines of NGC 1068 and two other such "nebulae" and classified them as extragalactic objects. In 1943, Carl Keenan Seyfert discovered more galaxies similar...

4) light-days. "NED search results for SDSS J1004+4112". NASA/IPAC Extragalactic Database. Retrieved 2025-06-15. "Gravitational Lens SDSS J1004+4112...

Density wave theory or the Lin–Shu density wave theory is a theory proposed by C.C. Lin and Frank Shu in the mid-1960s to explain the spiral arm structure...

and Lyman-beta emission. "NED search results for 4C 05.34". NASA/IPAC Extragalactic Database. Retrieved 2025-06-01. Lynds, R. (May 1970). "The Unusually...

morphology similar NGC 1232, a nearby intermediate spiral galaxy "NASA/IPAC Extragalactic Database". Results for NGC 1300. Retrieved 2007-03-15. Atkinson, J.W...

4617". NASA/IPAC Extragalactic Database. NASA and Caltech. Retrieved 26 August 2025. "Distance Results for NGC 4617". NASA/IPAC Extragalactic Database. NASA...

Weidong; Richmond, Michael W. (December 2000). "SN 1997bs in M66: Another Extragalactic η Carinae Analog?". Publications of the Astronomical Society of the...

measurement of the Hubble constant and matter content of the Universe using extragalactic background light γ-ray attenuation". The Astrophysical Journal. 885...

globular cluster formerly thought to be part of our galaxy reassigned to extragalactic status, even if not recognized as such for more than two centuries....

for UGC 312". NASA/IPAC Extragalactic Database. Retrieved 2026-05-16. "NED results for MCG +01-02-018". NASA/IPAC Extragalactic Database. Retrieved 2026-05-16...

series itself). The intention was that the original Mysterons were extragalactic beings that established a base on Mars in the distant past. In the early...

observed at considerable distances in the universe, and the study of extragalactic H II regions (Such as NGC 604 and 206) is important in determining the...

as large as the full Moon in visible light. Aquila also holds some extragalactic objects. One of them is what may be the largest single mass concentration...

Metric". Cosmological Physics. Cambridge University Press: NASA/IPAC Extragalactic Database - California Institute of Technology. Archived 8 September...

collision between the Milky Way and Andromeda galaxies, the future state of extragalactic astronomy, astrophysical implications of black hole recoil in galaxy...

CfA2 Great Wall. List of NGC objects (6001–7000) NGC 1316 "NASA/IPAC Extragalactic Database". Results for NGC 6039. Retrieved 2018-01-09. "Your NED Search...

"NASA/IPAC Extragalactic Database". Results for NGC 0338. Retrieved September 2, 2016. "Distance Results for NGC 1285". NASA/IPAC EXTRAGALACTIC DATABASE...

"NASA/IPAC Extragalactic Database". Results for NGC 0021. Retrieved 2010-05-03. "Distance Results for NGC 0021". NASA/IPAC Extragalactic Database. Retrieved...

147 kpc/arcsec multiplied with given angular diameters. "NASA/IPAC Extragalactic Database". Results for 3C 236. Retrieved 2008-07-19. "SIMBAD query result"...

survey on 19 May 2014. List of Messier objects Canes II Group "NASA/IPAC Extragalactic Database". Results for Messier 106. Retrieved 7 December 2006. Tonry...

of NGC objects (4001–5000) "Results for object NGC 4419". NASA/IPAC Extragalactic Database. NASA and Caltech. Retrieved 9 August 2025. Seligman, Courtney...

object NGC 3310". NASA/IPAC Extragalactic Database. Retrieved 9 July 2026. "Distance Results for NGC 3310". NASA/IPAC Extragalactic Database. NASA. Retrieved...

with MCG-5-2-16 and IC 1555. It is a Shapley-Ames galaxy. "NASA/IPAC Extragalactic Database". Results for NGC 0148. Retrieved 2017-01-01. "NGC 148". SIMBAD...

2015.[dead link] Nigel Henbest (30 July 1974). "Observations of 48 Extragalactic Radio Sources with the Cambridge 5-km Telescope at 5 GHz". Monthly Notices...

Space.com – Massive Black Hole Stumps Researchers Simbad "NASA/IPAC Extragalactic Database". Results for 0901+6942. Retrieved 2010-04-20. Romani, Roger...

from the Hubble Space Telescope's Cosmic Assembly Near-infrared Deep Extragalactic Legacy Survey (CANDELS) and Spitzer Space Telescope's Great Observatories...

of NGC objects (1001–2000) "Results for object NGC 1363". NASA/IPAC Extragalactic Database. NASA and Caltech. Retrieved 18 June 2026. Seligman, Courtney...

19, 1828 by John Herschel (and later listed as NGC 2299). "NASA/IPAC Extragalactic Database (NED) results for object NGC 2302". NASA/IPAC. Retrieved 2026-04-10...

Fornax Cluster Norma Cluster Virgo Cluster "Eridanus Cluster". NASA/IPAC Extragalactic Database (NED). Retrieved 2012-02-25. Omar, A.; Dwarakanath, K. S. (March...

Retrieved 28 November 2006. "Saggitarius Dwarf Spheroidal". NASA/IPAC Extragalactic Database. Retrieved 28 November 2006. Toguchi-Tani, Ellie K. H.; Hey...

1981) was a British astrophysicist who made major contributions to extragalactic astronomy and cosmology. He obtained his PhD from California Institute...

not known to have an active galactic nucleus. "By Name | NASA/IPAC Extragalactic Database". ned.ipac.caltech.edu. Retrieved 2024-12-12. "NGC 5601 - Galaxy...

Nature News, 19 September 2008 Gänsicke et al.: SCP06F6: A carbon-rich extragalactic transient at redshift z~0.14. Preprint, 2008. Quimby; Kulkarni; Kasliwal;...

years ago. Pelican Nebula Cygnus Molecular Nebula Complex "NASA/IPAC Extragalactic Database". Results for NGC 7000. Retrieved 2006-10-17. Kuhn, Michael...

v t e Extragalactic stars Andromeda Galaxy 3XMM J004232.1+411314 AE Andromedae AF Andromedae M31-2014-DS1 M31 RV PA-99-N2 Large Magellanic Cloud B90 BAT99-7...

6744". NASA/IPAC Extragalactic Database. NASA and Caltech. Retrieved 31 August 2006. "Distance Results for NGC 6744". NASA/IPAC Extragalactic Database. NASA...

Kristine Spekkens Born Hamilton, Ontario, Canada Scientific career Fields Extragalactic Astrophysics Institutions Queen's University Thesis Testing Cold Dark...

(June 1, 1974). "The Gravitational Slingshot and the Structure of Extragalactic Radio Sources". The Astrophysical Journal. 190: 253–270. Bibcode:1974ApJ...

2476, NGC 2493, NGC 2524, NGC 2415, UGC 3937, and UGC 3944. "NASA/IPAC Extragalactic Database". Results for NGC 2445. Retrieved 2024-03-26. Seligman, Courtney...

NGC 1699 lies at a projected distance of 6.5 arcminutes. "NASA/IPAC Extragalactic Database". Results for NGC 1700. Retrieved 2016-01-18. "Revised NGC...

December 2011. Retrieved 6 November 2011. "Shock Diamonds In Space: Extragalactic Afterburner From PKS 0637-752 | Science 2.0". www.science20.com. 27...

professor of physics and Canada Research Chair", X-TRA, The High-Energy and Extragalactic Research Team, Université de Montréal, retrieved 2025-07-28 Anctil,...

of 5.5 × 108 M☉. NGC 3937 "Results for object NGC 3929". NASA/IPAC Extragalactic Database. NASA and Caltech. Retrieved 21 June 2025. "Your NED Search...

galaxies targeted by the Hubble Space Telescope (HST) Key Project on the Extragalactic Distance Scale, which aimed to calibrate various secondary distance...

Retrieved 2020-12-12. "Results for object NGC 0164 (NGC 164)". NASA/IPAC Extragalactic Database. California Institute of Technology. Retrieved 2020-12-12....

distinguishing extragalactic from galactic nebulae, the former being independent star systems. M87 was classified as a type of elliptical extragalactic nebula...

"Coordinate Transformation & Galactic Extinction Calculator". NASA/IPAC Extragalactic Database. California Institute of Technology. Archived from the original...

The fundamental plane is a set of bivariate correlations connecting some of the properties of normal elliptical galaxies. Some correlations have been empirically...

Retrieved 2025-11-30. "NED Results for QSO J0931+3204". NASA/IPAC Extragalactic Database. Retrieved 2025-11-30. Paturel, G.; Petit, C.; Prugniel, Ph...

Cosmochemistry – Study of the chemical composition of matter in the universe Extragalactic astronomy – Study of astronomical objects outside the Milky Way Galaxy...

15 arcminutes away. NGC 1667 by Sloan Digital Sky Survey "NASA/IPAC Extragalactic Database". Results for NGC 1667. Retrieved 2016-01-18. "Revised NGC...

of NGC objects (7001–7840) "Results for object NGC 7496". NASA/IPAC Extragalactic Database. Retrieved 2019-01-18. Rodríguez, M. Jimena; Lee, Janice C...

Loud Quasar 3C 186 and its Impact on the Cluster Environment at z=1". Extragalactic Jets: Theory and Observation from Radio to Gamma Ray. 386: 350. arXiv:0708...

ISSN 2041-8205. "NED search results for SDSS J1029+2623". NASA/IPAC Extragalactic Database. Retrieved 2025-07-06. Inada, Naohisa; Oguri, Masamune; Morokuma...

record for this object at VizieR. "NASA/IPAC Extragalactic Database (NED) - NGC 1163". NASA/IPAC Extragalactic Database. Retrieved 2024-06-19. Seligman,...

Serpens. NGC 6027 NGC 6027a NGC 6027b NGC 6027c NGC 6027d "NASA/IPAC Extragalactic Database". Results for NGC 6027e. Retrieved 2007-04-18. "HubbleSite...

5735". NASA/IPAC Extragalactic Database. NASA and Caltech. Retrieved 24 March 2026. "Distance Results for NGC 5735". NASA/IPAC Extragalactic Database. NASA...

object NGC 0019". NASA/IPAC Extragalactic Database. Retrieved 3 May 2010. "Distance Results for NGC 0019". NASA/IPAC EXTRAGALACTIC DATABASE. NASA. Retrieved...

source 2A 0252+060 (1H 0253+058, XRS 02522+060). SIMBAD "NASA/IPAC Extragalactic Database". Results for 3C 75. Retrieved 2010-04-26. Nemiroff, R.; Bonnell...

phase curves Exoplanetary Circumstellar Environments and Disk Explorer Extragalactic planet Extrasolar planets in fiction Geodynamics of terrestrial exoplanets...

v t e Extragalactic stars Andromeda Galaxy 3XMM J004232.1+411314 AE Andromedae AF Andromedae M31-2014-DS1 M31 RV PA-99-N2 Large Magellanic Cloud B90 BAT99-7...

NASA/IPAC NGC 3200 at SIMBAD NGC 3200 at LEDA "By Name | NASA/IPAC Extragalactic Database". ned.ipac.caltech.edu. Retrieved 2024-07-02. "NED Query Results...

spiral galaxies "Results for object NGC 0468 (NGC 468)". NASA/IPAC Extragalactic Database. California Institute of Technology. Retrieved 2021-02-23....

1045 erg s−1. "NED Search results for IRAS F12032+1707". NASA/IPAC Extragalactic Database. Retrieved 2025-12-21. Sirocky, M. M.; Levenson, N. A.; Elitzur...

S2CID 250737862. 50. "Results for object NGC 0768 (NGC 768)". NASA/IPAC Extragalactic Database. California Institute of Technology. Retrieved 2020-05-24....

"NGC 578". www.noirlab.edu. Retrieved 1 February 2025. "NASA/IPAC Extragalactic Database". Results for NGC 578. Retrieved 1 February 2025. "Revised...

by Jarrett et al. 2000, with all the data retrieved from NASA/IPAC Extragalactic Database. As for the star formation, they employed a decreasing function...

billion M☉. "NED Search results for QSO B1823+568 (1823+568)". NASA/IPAC Extragalactic Database. Retrieved 2025-05-11. Gabuzda, Denise C.; Cawthorne, Timothy...

and exoplanets 2006 Govind Swarup Radio astronomy 2008 Max Pettini Extragalactic cosmology 2010 James H. Hough Polarimetry 2012 Mike Irwin Digital optical...

Catalog Objects: NGC 550 - 599". cseligman.com. "By Name | NASA/IPAC Extragalactic Database". ned.ipac.caltech.edu. "NGC 568 - Elliptical/Spiral Galaxy...

the structure and components of the Milky Way and of other galaxies. Extragalactic astronomy – study of objects (mainly galaxies) outside the Milky Way...

population located there. List of NGC objects (1001-2000) "NASA/IPAC Extragalactic Database". results for object PGC 012460*. Retrieved 2025-04-26. Seligman...

"IC 1511". SIMBAD. Retrieved February 21, 2022. "By Name | NASA/IPAC Extragalactic Database". ned.ipac.caltech.edu. Retrieved 2022-02-21. "New General...

galaxy—proof that BL Lacertae was not a star—were found in 1974. The extragalactic nature of BL Lacertae was not a surprise. In 1972 a few variable optical...

v t e Extragalactic stars Andromeda Galaxy 3XMM J004232.1+411314 AE Andromedae AF Andromedae M31-2014-DS1 M31 RV PA-99-N2 Large Magellanic Cloud B90 BAT99-7...

"NASA/IPAC Extragalactic Database". Results for NGC 0145. Retrieved 2010-05-03. "Distance Results for NGC 145". NASA/IPAC Extragalactic Database. Retrieved...

for NGC 4565". NASA/IPAC Extragalactic Database. Retrieved 2026-03-27. "Distance Results for NGC 4565". NASA/IPAC Extragalactic Database. Retrieved 2026-03-27...

for about 40 million light years from the Virgo Cluster. "NASA/IPAC Extragalactic Database". Results for NGC 5701. Retrieved 2025-03-18. "Revised NGC...

estimated mass of 9 × 108 M☉. "Results for object NGC 4692". NASA/IPAC Extragalactic Database. NASA and Caltech. Retrieved 2026-01-25. "Your NED Search Results"...

Real-time Transient Survey and Stan Howerton on 26 January 2012. "NASA/IPAC Extragalactic Database". Results for NGC 0268. Retrieved September 2, 2016. "New General...

contributing the light at 20%. "NED Search results for ESO 541-13". NASA/IPAC Extragalactic Database. Retrieved 2026-03-01. Slee, O. B.; Reynolds, J. E. (1984)...

and Cambridge University Press. ISBN 978-0-933346-51-2. "NASA/IPAC Extragalactic Database". Results for NGC 4656. Retrieved 2006-04-30. info@noirlab...

Astrophysics. She was a founder of the Cosmic Assembly Near-infrared Deep Extragalactic Legacy Survey (CANDELS) collaboration. She is part of leadership of...

he led the observation of the proper motion of stars with respect to extragalactic nebula. A crater on Mars and another on the Moon were named in his honor...

NASA/IPAC Extragalactic Database. NASA and Caltech. Retrieved 13 November 2024. "Distance Results for NGC 6492". NASA/IPAC EXTRAGALACTIC DATABASE. NASA...

the Coma Cluster. List of NGC objects (4001–5000) NGC 4889 "NASA/IPAC Extragalactic Database". Results for NGC 4886. Retrieved 2018-04-23. "Your NED Search...

et al. (July 2018), "The Arecibo Legacy Fast ALFA Survey: The ALFALFA Extragalactic H I Source Catalog", The Astrophysical Journal, 861 (1): 49, arXiv:1805...

Release. Retrieved 13 December 2012. Huchra, John. "Extragalactic Redshifts". NASA/IPAC Extragalactic Database. Harvard-Smithsonian Center for Astrophysics...

astronomical objects Starburst galaxies Superclusters Voids Related Extragalactic astronomy Galactic astronomy Galactic coordinate system Galactic habitable...

Ros, E.; Zensus, J. A. (2003-03-17). "Intraday variability in compact extragalactic radio sources II. Observations with the Effelsberg 100 m radio telescope"...

study conducted in 2025. "NED Search results for 3C 298". NASA/IPAC Extragalactic Database. Retrieved 2025-09-06. Graham, D. A.; Matveyenko, L. I. (1984)...

be described by macroscopic concepts. Orders of magnitude (length) Extragalactic distance scale Scale height Zee, Anthony (2010). Quantum field theory...

SIMBAD. Retrieved 2025-12-01. "NED Results for LEDA 896325". NASA/IPAC Extragalactic Database. Retrieved 2025-12-01. G., Paturel (2003). "HYPERLEDA. I. Identification...

interferometric study of 21 cm absorption towards a large number of galactic and extragalactic sources. He also contributed in designing and fabricating hang-gliders...

The Low-Frequency Array (LOFAR) is a large radio telescope, with an antenna network located mainly in the Netherlands, and spreading across 7 other European...

within NGC 7503. "Results for object NGC 7503 (NGC 7503)". NASA/IPAC Extragalactic Database. California Institute of Technology. Retrieved 2021-07-31....

6027b NGC 6027c NGC 6027e List of NGC objects (6001–7000) "NASA/IPAC Extragalactic Database". Results for NGC 6027d. Retrieved 2007-04-17. Li, W. D. (2000)...

223F. doi:10.1086/341786. ISSN 0067-0049. S2CID 16100301. "NASA/IPAC Extragalactic Database". Results for object NGC 7742. Retrieved 2006-08-20. "Centre...

image of NGC 2937. List of NGC objects (2001–3000) "By Name | NASA/IPAC Extragalactic Database". ned.ipac.caltech.edu. Retrieved 2024-07-03. "APOD: 2017 February...

foundational indicators of cosmic benchmarks for scaling galactic and extragalactic distances. The physical model explaining the Leavitt's law for classical...

S2CID 11672751. "Results for object NGC 4911 (NGC 4911)". NASA/IPAC Extragalactic Database. California Institute of Technology. Retrieved 2020-12-12....

8960. Retrieved 4 July 2022. Wikimedia Commons has media related to Vela Pulsar. Vela Pulsar at SIMBAD Vela Pulsar at NASA/IPAC Extragalactic Database...

for a third and final time by Edward E. Barnard in August 1905. "Ned Extragalactic Database". Retrieved 2018-11-21. "APOD: 2002 September 18- A Sagittarius...

reaching between 40% and 50%. "NED Search results for 4C 30.31". NASA/IPAC Extragalactic Database. Retrieved 2026-04-18. Olsen, E. T. (August 1967). "Accurate...

3804, UGC 3838, UGC 3878, UGC 3626, UGC 3644, and UGC 3701. "NASA/IPAC Extragalactic Database". Results for UGC 3730. Retrieved 2024-03-26. Romano, R.; Mayya...

NGC 5121A, and ESO 324- 26. "Results for object NGC 5121". NASA/IPAC Extragalactic Database. NASA and Caltech. Retrieved 25 February 2025. "Revised NGC...

List of NGC objects (1–1000) "Results for object NGC 0213". NASA/IPAC Extragalactic Database. Retrieved 2016-09-02. "New General Catalog Objects: NGC 200...

Strasbourg. Retrieved 2021-08-23. "Results for object NGC 997". NASA/IPAC Extragalactic Database. NASA and Caltech. Retrieved 5 September 2024. Seligman, Courtney...

Simbad "NASA/IPAC Extragalactic Database". Results for 3C 47. Retrieved 2006-10-26. "3C 47". XJET: X-Ray Emission from Extragalactic Radio Jets. 2009-04-01...

direction of cosmic rays at energies above 8×1018 eV. This supports that extragalactic sources (i.e. outside of our galaxy) for the origin of these extremely...

equals to 50,000 years. "NED Search results for 4C 18.68". NASA/IPAC Extragalactic Database. Retrieved 2025-08-30. Smith, Eric P.; Heckman, Timothy M....

(1–1000) NGC 201 (SDSS) NGC 201 with nearby galaxies (SDSS) "NASA/IPAC Extragalactic Database". Results for NGC 201. Retrieved 2015-09-04. "New General Catalogue...

28 July 2018. Thomas E. Collett; et al. (22 June 2018). "A precise extragalactic test of General Relativity". Science. 360 (6395): 1342–1346. arXiv:1806...

données astronomiques de Strasbourg. Retrieved 2010-04-21. "NASA/IPAC Extragalactic Database". Results for 3C 147. Retrieved 2010-04-21. Rossetti, A.; Mantovani;...

Ursa Major Cloud. List of NGC objects (3001–4000) NGC 4111 "NASA/IPAC Extragalactic Database". Results for NGC 4118. Retrieved 2025-06-17. Pak, Mina; Rey...

of NGC objects (1001–2000) "Results for object NGC 1954". NASA/IPAC Extragalactic Database. NASA and Caltech. Retrieved 24 July 2024. Seligman, Courtney...

Muley, Aarti; Purohit, Arundhati (2025-09-25). "RAD@home discovery of extragalactic radio rings and odd radio circles: clues to their origins". Monthly...

108 M☉. Coma Supercluster "Results for object NGC 4211". NASA/IPAC Extragalactic Database. NASA and Caltech. Retrieved 2025-07-17. Zhu, Ming; Seaquist...

Hackney, K. R.; Hackney, R. L. (1976-01-01). "Optical behavior of 64 extragalactic radio sources". The Astronomical Journal. 81: 7–19. Bibcode:1976AJ....

northwestern wing. "NED Search results for SDSS J1239+5414". NASA/IPAC Extragalactic Database. Retrieved 2026-05-01. Smith, K. L.; Shields, G. A.; Bonning...

measures used in cosmology. "NED results for object TON 618". NASA/IPAC EXTRAGALACTIC DATABASE. Archived from the original on 2021-08-15. Retrieved 2021-08-15...

5681". NASA/IPAC Extragalactic Database. NASA and Caltech. Retrieved 18 June 2025. "Distance Results for NGC 5681". NASA/IPAC EXTRAGALACTIC DATABASE. NASA...

"By Name | NASA/IPAC Extragalactic Database". ned.ipac.caltech.edu. Retrieved 2022-02-18. "By Name | NASA/IPAC Extragalactic Database". ned.ipac.caltech...

in the Virgo Supercluster. "Results for object NGC 3166". NASA/IPAC Extragalactic Database. NASA and Caltech. Retrieved 12 February 2025. "Revised NGC...

(ISSP), on 26 August 2011. "Results for object NGC 0459". NASA/IPAC Extragalactic Database. NASA and Caltech. "Galaxy NGC 459". DSO Browser Deep Sky....

October 2010. "Detailed Information for Object Malin 1". NASA/IPAC Extragalactic Database. Retrieved April 18, 2012. Barth, Aaron J. (March 2007). "A...

{{cite web}}: Missing or empty |title= (help) "By Name | NASA/IPAC Extragalactic Database". ned.ipac.caltech.edu. Retrieved 2024-07-05. "New General...

Sharpless 29, an irregular H II region. "NED results for object NGC 6559". Extragalactic Database. NASA/IPAC. Retrieved 2 May 2013. "An Anarchic Region of Star...

v t e Extragalactic stars Andromeda Galaxy 3XMM J004232.1+411314 AE Andromedae AF Andromedae M31-2014-DS1 M31 RV PA-99-N2 Large Magellanic Cloud B90 BAT99-7...

towards north with average polarization of 4 percent. "By Name NASA/IPAC Extragalactic Database". ned.ipac.caltech.edu. Retrieved 2024-10-19. "1ES 1959+650...

S2CID 246823634. "Results for WISEA J081421.70+522410.0". NASA/IPAC Extragalactic Database. Oei, Martijn S. S. L.; van Weeren, Reinout J.; Gast, Aivin...

of NGC objects (2001–3000) "Results for object NGC 2315". NASA/IPAC Extragalactic Database. NASA and Caltech. Retrieved 12 February 2026. Seligman, Courtney...

The Freeman law is a statement in astronomy which says that disk galaxies have the same surface brightness, Σ at the center. It was described in 1970 by...

Active Galactic Nuclei at z > 4: A Sample of Little Red Dots in the JWST Extragalactic Legacy Fields". The Astrophysical Journal. 986 (2): 126. arXiv:2404...

database of information on SSSB, maintained by JPL and Caltech. NASA/IPAC Extragalactic Database (NED) – a database of information on objects outside the Milky...

5907". NASA/IPAC Extragalactic Database. NASA and Caltech. Retrieved 2010-07-11. "Distance Results for NGC 5907". NASA/IPAC Extragalactic Database. Retrieved...

Retrieved 2 June 2015. "NED results for object 3C 215". NASA/IPAC Extragalactic Database. Retrieved 2 June 2015. Alan Bridle (6 November 1996). "3C215...

and is made up of three subgroups. "Results for IC 2082". NASA/IPAC Extragalactic Database. Retrieved 2025-07-25. "Revised IC Data for IC 2082". spider...

The interaction started less than one billion years ago. "NASA/IPAC Extragalactic Database". Results for NGC 1596. Retrieved 6 February 2025. "Revised...

NASA/IPAC NGC 1340 at SIMBAD NGC 1340 at LEDA "By Name | NASA/IPAC Extragalactic Database". ned.ipac.caltech.edu. Retrieved 2024-07-20. "New General...

Press. ISBN 978-0-933346-51-2. "Results for Messier 081". NASA/IPAC Extragalactic Database. NASA and Caltech. Retrieved 6 November 2022. "M 81". SIMBAD...

4038". NASA/IPAC Extragalactic Database. Retrieved August 3, 2025. "Detailed Information for Object NGC 4039". NASA/IPAC Extragalactic Database. Retrieved...

its redshift. "Detailed Information for Object NGC 6872". NASA/IPAC Extragalactic Database. Retrieved 30 December 2014. "NASA's GALEX Reveals the Largest-Known...

3389". NASA/IPAC Extragalactic Database. NASA and Caltech. Retrieved 23 July 2025. "Distance Results for NGC 3389". NASA/IPAC EXTRAGALACTIC DATABASE. NASA...

nucleus. "NED Search results for SDSS J105054.22+225651.0". NASA/IPAC Extragalactic Database. Retrieved 2026-08-08. Kozieł-Wierzbowska, Dorota; Goyal, Arti;...

– study of the interstellar medium, intergalactic medium and dust. Extragalactic astronomy – study of objects (mainly galaxies) outside our Galaxy, including...

Dwarf Spheroidal Galaxy Monoceros Ring Virgo Stellar Stream "NASA/IPAC Extragalactic Database". Results for Canis Major Dwarf. Retrieved 16 March 2007. "Astronomers...

Malo Gusto (born 2003), French footballer GUSTO, short for Galactic / Extragalactic ULDB Spectroscopic Terahertz Observatory, a high-altitude balloon mission...

In astronomy, extinction is the absorption and scattering of electromagnetic radiation by dust and gas between an emitting astronomical object and the...

7124". NASA/IPAC Extragalactic Database. NASA and Caltech. Retrieved 6 August 2024. "Distance Results for NGC 7124". NASA/IPAC EXTRAGALACTIC DATABASE. NASA...

Catalina Real-time Transient Survey on 7 December 2023. "NASA/IPAC Extragalactic Database". Results for NGC 0060. Retrieved 2010-05-04. Seligman, Courtney...

"NASA/IPAC Extragalactic Database". Results for NGC 311. Retrieved September 2, 2016. "Distance Results for NGC 311". NASA/IPAC EXTRAGALACTIC DATABASE....

another lenticular galaxy in the Virgo Cluster NGC 7020 "NASA/IPAC Extragalactic Database". Results for NGC 4612. Retrieved 2017-09-10. "Your NED Search...

-01-02-032". NASA/IPAC Extragalactic Database. Retrieved 2026-05-17. "NED results for WISEA J003425.11-073558.2". NASA/IPAC Extragalactic Database. Retrieved...

object NGC 1232". NASA/IPAC Extragalactic Database. Retrieved 2006-11-25. "Distance Results for NGC 1232". NASA/IPAC Extragalactic Database. Retrieved 2010-06-22...

List of NGC objects (1001–2000) Perseus (constellation) "NASA/IPAC Extragalactic Database". ned.ipac.caltech.edu. Retrieved March 3, 2019. "Revised NGC...

NASA/IPAC Extragalactic Database. "NGC 1158". German Wikipedia. "NGC 1158". Celestial Atlas. "NGC 1158". In-The-Sky.org. "NGC 1158". NASA/IPAC Extragalactic Database...

"NASA/IPAC Extragalactic Database". Results for NGC 0014. Retrieved 2010-05-03. "Distance Results for NGC 0014". NASA/IPAC Extragalactic Database. Retrieved...

material. Holmberg II was discovered by Erik Bertil Holmberg. "NASA/IPAC EXTRAGALACTIC DATABASE". Data for Holmberg II. Retrieved 2008-09-19. "Galaxy caught...

3314". NASA/IPAC Extragalactic Database. NASA and Caltech. Retrieved 18 July 2025. "Results for object NGC 3314A". NASA/IPAC Extragalactic Database. NASA...

Herschel. [ned.ipac.caltech.edu "Results for NGC 2178"]. NASA/IPAC Extragalactic Database. Retrieved 2025-12-23. {{cite web}}: Check |url= value (help)...

Institute (U.S.) - Extragalactic background radiation: a meeting in honor of Riccardo Giacconi : proceedings of the Extragalactic Background Radiation...

of NGC objects (2001–3000) "Results for object NGC 2804". NASA/IPAC Extragalactic Database. NASA and Caltech. Retrieved 10 August 2024. Seligman, Courtney...

WHz-1. "NED Search results for SDSS J092255.18+541828.2". NASA/IPAC Extragalactic Database. Retrieved 2026-06-27. Lopes, P. A. A. (September 2007). "Empirical...

Gaia-Enceladus debris, then the star and its planets could have an extragalactic origin. Roman, Nancy G. (1987). "Identification of a constellation from...

brightest known component. "NED Search results for B3 0651+428". NASA/IPAC Extragalactic Database. Retrieved 2026-04-19. Wu, Zhongzu; Jiang, D. R.; Gu, Minfeng;...

were originally formed in now defunct dwarf spheroidals. "NASA/IPAC Extragalactic Database". Results for Fornax Dwarf Spheroidal. Retrieved 2006-11-29...

1885, by Francis Leavenworth. List of NGC objects (1–1000) "NASA/IPAC Extragalactic Database". Results for NGC 0209. Retrieved 2016-09-02. An object's distance...

"extremely faint, small, round, very faint star to west." "NASA/IPAC Extragalactic Database". Results for NGC 0397. Retrieved September 2, 2016. "NGC 397"...

NGC 3447 (GALEX) at WikiSky NGC 3447 at Seligman "By Name | NASA/IPAC Extragalactic Database". ned.ipac.caltech.edu. Retrieved 2024-07-21. "Revised data...

2025 respectively. "NED Search results for PKS 1413+135". NASA/IPAC Extragalactic Database. Retrieved 2025-12-27. Romanishin, W. (Dec 1992). "The BL Lacertae...

v t e Extragalactic stars Andromeda Galaxy 3XMM J004232.1+411314 AE Andromedae AF Andromedae M31-2014-DS1 M31 RV PA-99-N2 Large Magellanic Cloud B90 BAT99-7...

(JAdES), a type of advanced electronic signature JWST Advanced Deep Extragalactic Survey (JADES) JADE (particle detector), a particle detector at DESY...

Wayback Machine, Liliya L. R. Williams, Astrophysics II: Galactic and Extragalactic Astronomy, University of Minnesota. Retrieved 20 July 2008. Darling...

Retrieved 2025-07-06. "NED search results for PKS 2052-474". NASA/IPAC Extragalactic Database. Retrieved 2025-07-06. Bolton, J. G.; Gardner, F. F.; Mackey...

List of NGC objects (6001–7000) "Object No. 1 – NGC 6207". NASA/IPAC extragalactic database. NASA/IPAC. Retrieved 3 October 2015. "Revised NGC Data for...

of NGC objects (3001–4000) "Results for object NGC 3124". NASA/IPAC Extragalactic Database. NASA and Caltech. Retrieved 22 February 2025. "Revised NGC...

focuses on what led Boba Fett and the Mandalorians to fend off the extragalactic Yuuzhan Vong invaders in The New Jedi Order: The Unifying Force (set...

HCG 87 Galactic Clusters Studies of Hickson Compact Groups "NASA/IPAC Extragalactic Database". Results for HCG 87. Retrieved 2006-10-19. "This redshift...

Swift on 7 September 1885. List of NGC objects (1–1000) "NASA/IPAC Extragalactic Database". Results for NGC 0048. Retrieved 2010-05-05. An object's distance...

imaged UTC 2023-04-24T03:06 "Distance Results for NGC 4995". NASA/IPAC Extragalactic Database. Retrieved 2023-04-21. "Revised NGC Data for NGC 4995". spider...

It was discovered on November 29, 1850 by Bindon Stoney. "NASA/IPAC Extragalactic Database". Results for NGC 0316. Retrieved September 2, 2016. "New General...

List of NGC objects (1–1000) "Results for object NGC 0685". NASA/IPAC Extragalactic Database. NASA and Caltech. Retrieved 1 February 2025. "Revised NGC...

Catalogue by JLE Dreyer. "NED results for object NGC 1721". NASA/IPAC Extragalactic Database (NED). Retrieved March 15, 2012. "cseligman.com". "NGC 1723...

Hoyle, F.; Narlikar, J. V.; Wickramasinghe, N. C. (August 1990). "The extragalactic Universe: an alternative view". Nature. 346 (6287): 807–812. doi:10...

position of the BCG. "NED Search results for Abell 1758N BCG". NASA/IPAC Extragalactic Database. Retrieved 2026-05-31. Boschin, W.; Girardi, M.; Barrena, R...

Retrieved 2 June 2015. "NED results for object 3C 299". NASA/IPAC Extragalactic Database. Retrieved 2 June 2015. www.jb.man.ac.uk/atlas/ (J. P. Leahy)...

Galaxy morphological classification is a system used by astronomers to divide galaxies into groups based on their visual appearance, shape, structure,...

of NGC objects (2001–3000) "Results for object NGC 2708". NASA/IPAC Extragalactic Database. NASA and Caltech. Retrieved 8 August 2024. Seligman, Courtney...

researchers used data from the ALMA Comprehensive High-resolution Extragalactic Molecular Inventory (ALCHEMI) project and reported evidence of phosphorus...

half the diameter of the Milky Way. Image from the 2MASS "NASA/IPAC Extragalactic Database". Results for NGC 406. Retrieved 12 February 2017. "NGC 406"...

the designation SN 2001dj. List of NGC objects (1–1000) "NASA/IPAC Extragalactic Database". Results for NGC 0180. Retrieved 2016-09-02. "New General...

A Digitized Sky Survey (DSS) image of NGC 1536 "By Name | NASA/IPAC Extragalactic Database". ned.ipac.caltech.edu. Retrieved 2025-01-05. "New General...

determined at an observatory by observing the diurnal motion of stars or extragalactic radio sources, and also from ranging observations of the Moon and artificial...

"SkyFactory.org". Archived from the original on May 19, 2011. "SIMBAD Extragalactic Database". "SN 2026ree". Transient Name Server. IAU. Retrieved 24 July...

données astronomiques de Strasbourg. Retrieved 29 May 2019. "NASA/IPAC Extragalactic Database". ned.ipac.caltech.edu. Retrieved 29 May 2019. Seligman, Courtney...

member of the Virgo Cluster. List of NGC objects (4001–5000) "NASA/IPAC Extragalactic Database". Results for NGC 4464. Retrieved 2017-08-25. "Your NED Search...

List of NGC objects Galaxy "Results for object NGC 0043". NASA/IPAC Extragalactic Database. NASA and Caltech. Retrieved 11 June 2025. Seligman, Courtney...

clusters X-ray astronomy "NED results for object ABELL 0209". NASA/IPAC Extragalactic Database (NED). NASA and Caltech. Retrieved 3 July 2025. Abell, George...

blue variable in outburst. "Results for object NGC 3423". NASA/IPAC Extragalactic Database. NASA and Caltech. Retrieved 18 February 2025. "Revised NGC...

WHz-1. "NED Search results for SDSS J114033.75+563927.8". NASA/IPAC Extragalactic Database. Retrieved 2026-08-01. Wen, Z. L.; Han, J. L.; Liu, F. S. (2012-03-30)...

1A. doi:10.1086/191333. ISSN 0067-0049. "Norma Cluster". NASA/IPAC Extragalactic Database (NED). Retrieved 2012-02-25. Kraan-Korteweg, Renee C. (2000)...

News: Breaking Science News. Retrieved 2024-07-17. "By Name | NASA/IPAC Extragalactic Database". ned.ipac.caltech.edu. Retrieved 2024-07-17. "New General...

galaxy NGC 4754. SDSS image of NGC 4762 HST image of NGC 4762 "NASA/IPAC Extragalactic Database". Results for NGC 4762. Retrieved 2016-01-18. "A galaxy on...

additional details can be accessed by clicking the link for the NASA/IPAC Extragalactic Database (NED) on the right-hand side of the table. Listed below are...

reflector telescope. "Results for object NGC 4534 (NGC 4534)". NASA/IPAC Extragalactic Database. California Institute of Technology. Retrieved 2020-12-12....

Edward N. Zalta (ed.) Madore, Barry F., "Level 5 : A Knowledgebase for Extragalactic Astronomy and Cosmology". Caltech and Carnegie. Pasadena, California...

phase curves Exoplanetary Circumstellar Environments and Disk Explorer Extragalactic planet Extrasolar planets in fiction Geodynamics of terrestrial exoplanets...

infrared/TeV crisis: Lack of attenuation of very energetic gamma rays from extragalactic sources. What is the nature of little red dots? How do galactic history...

galaxy with its gas disk orbiting opposite the disk of stars "NASA/IPAC Extragalactic Database". Results for NGC 4622. Retrieved 2024-12-31. Buta, Ronald...

structure. UGC 12158 Milky Way "NED results for object UGC 6093". NASA/IPAC Extragalactic Database. Retrieved 20 March 2018. "Hubble's Barred and Booming Spiral...

currently accreting at a rate of 2.54×10−2 M☉ per year. "NASA/IPAC Extragalactic Database". Results for NGC 0449. Retrieved September 2, 2016. "New General...

ISBN 978-0-933346-51-2. "Results for object MESSIER 090". NASA/IPAC Extragalactic Database. Retrieved 1 February 2006. "Messier 90". SEDS Messier Catalog...

VT 1137-0337 is a extragalactic pulsar wind nebula (possibly a magnetar nebula) that is located 395 million light years away from planet earth in the...

v t e Extragalactic stars Andromeda Galaxy 3XMM J004232.1+411314 AE Andromedae AF Andromedae M31-2014-DS1 M31 RV PA-99-N2 Large Magellanic Cloud B90 BAT99-7...

observation to extragalactic astronomy and cosmology. In particular, he created the P(D) method that allowed number counts of extragalactic radio sources...

Primack, Joel R. "Formation of Structure in the Universe". NASA/IPAC Extragalactic Database. Caltech. Retrieved 25 May 2026. Akrami, Yashar; Anselmi, Stefano;...

2196 Group, which also includes NGC 2211, and NGC 2212. "NASA/IPAC Extragalactic Database". Results for NGC 2196. Retrieved 6 February 2025. "Revised...

1995). "Spectral Properties of Accretion Disks around Galactic and Extragalactic Black Holes". The Astrophysical Journal. 455: 623. arXiv:astro-ph/9510005v2...

Astronomical Society. Baton Rouge Astronomical Society. "NASA/IPAC Extragalactic Database". Results for NGC 2207 / IC 2163. Retrieved 2025-10-13. "NGC...

NASA/IPAC Extragalactic Database. Retrieved 2026-04-16. Bridle, A. H.; Kesteven, M. J. L.; Brandie, G. W. (January 1977). "Variability of extragalactic sources...

of 0.0029 parsecs. "NED search results for PKS 0426-380". NASA/IPAC Extragalactic Database. Retrieved 2025-08-02. Benkhali, F. Ait; Hofmann, W.; Rieger...

PGC 5100 and IC 1666. "NED Search results for IC 1689". NASA/IPAC Extragalactic Database. Retrieved 2026-01-03. "Revised IC Data for IC 1689". spider...

Kraan-Korteweg, R. C.; Fairall, A. P.; Balkowski, C. (1995-05-01). "Extragalactic Large-scale structures behind the southern Milky Way.I. Redshifts obtained...

Hydrogen α, X-Ray, Astrophoto, Sky Map, Articles and images "NASA/IPAC Extragalactic Database". Results for NGC 1419. Retrieved 2024-07-07. Jacoby, George...

11.98. "NED Search results for SDSS J104902.07+542348.9". NASA/IPAC Extragalactic Database. Retrieved 2026-07-18. Kozieł-Wierzbowska, Dorota; Goyal, Arti;...

which connects the Antlia Cluster with the Fornax Cluster. "NASA/IPAC Extragalactic Database". Results for NGC 2559. Retrieved 12 February 2025. "Revised...

the universe. He conceived the BICEP (Background Imaging of Cosmic Extragalactic Polarization) instrument, which observed from the South Pole. BICEP...

"NASA/IPAC Extragalactic Database". Results for NGC 2500. Retrieved 2010-05-13. "Distance Results for NGC 2500". NASA/IPAC Extragalactic Database. Retrieved...

strung out to the east of the Virgo Supercluster of galaxies. "NASA/IPAC Extragalactic Database". Results for NGC 5300. Retrieved 2007-04-04. "The Virgo III...

Eyes Galaxies Mice Galaxies "Results for object NGC 1268". NASA/IPAC Extragalactic Database. Retrieved 2018-06-19. "Your NED Search Results". ned.ipac...

and is a member of Abell 262. List of NGC objects (1–1000) "NASA/IPAC Extragalactic Database". Results for NGC 669. Retrieved 2018-11-16. "Your NED Search...

NGC 388, NGC 386 forms a galaxy cluster called Arp 331. "NASA/IPAC Extragalactic Database". Results for NGC 0386. Retrieved September 2, 2016. "New General...

It was described by Dreyer as "very faint, very small." "NASA/IPAC Extragalactic Database". Results for NGC 0445. Retrieved September 2, 2016. "New General...

for NGC 3184". NASA/IPAC Extragalactic Database. Retrieved 2010-06-01. "Distance Results for NGC 3184". NASA/IPAC Extragalactic Database. Retrieved 2010-06-01...

NASA/IPAC Extragalactic Database. NASA and Caltech. Retrieved 19 December 2024. "Distance Results for NGC 2672". NASA/IPAC EXTRAGALACTIC DATABASE. NASA...

diameters. "Detailed Information for Object ABELL 0085 BCG". NASA/IPAC Extragalactic Database. Retrieved September 11, 2023. "Astronomers Just Found an Absolutely...

CANDELS. Retrieved 2024-04-17. "Cosmic Assembly Near-infrared Deep Extragalactic Legacy Survey". IPAC. Retrieved 2024-04-17. Overview of the image, by...

Type IV civilization would be able to draw the energy it needs from extragalactic radiation. By studying the evolution of technologies that have changed...

to be 1.25 billion light-years away. and was first discovered as an extragalactic radio source by astronomers in 1983. This object is classified as a...

was described by Dreyer as "extremely faint, very small." "NASA/IPAC Extragalactic Database". Results for NGC 0355. Retrieved September 2, 2016. "New General...

Maarten Schmidt, published in 1963. Schmidt noted that if this object was extragalactic (outside the Milky Way, at a cosmological distance) then its large redshift...

of the Hercules Cluster. List of NGC objects (6001–7000) "NASA/IPAC Extragalactic Database". Results for NGC 6061. Retrieved 2018-08-31. "Your NED Search...

galaxy List of NGC objects (1–1000) Pisces (constellation) "NASA/IPAC Extragalactic Database". Results for NGC 0200. Retrieved 2016-09-02. "New General...

was discovered on October 2, 1886, by Francis Leavenworth. "NASA/IPAC Extragalactic Database". Results for NGC 0284. Retrieved September 2, 2016. "New General...

galaxy "NGC 1". NASA/IPAC Extragalactic Database. Retrieved 24 June 2026. "Distance Results for NGC 0001". NASA/IPAC Extragalactic Database. Retrieved 3 May...

This includes most of the stars in the solar neighborhood and many extragalactic objects such as bright active galactic nuclei, but this sensitivity...

around 6.46 × 108 M☉. "NED Search results for NGC 6137". NASA/IPAC Extragalactic Database. Retrieved 2025-12-07. "Revised NGC Data for NGC 6137". spider...

percentage rises from 1% to 10%. "NED Search results for IC 708". NASA/IPAC Extragalactic Database. Retrieved 2025-12-28. "Revised IC Data for IC 708". spider...

211A. doi:10.1086/190036. "Results for object NGC 0543". NASA/IPAC Extragalactic Database. NASA and Caltech. Retrieved 2020-04-10. Seligman, Courtney...

formerly known as Get Hot New Stuff in KDE Software Compilation 4 Deep Extragalactic Survey, one of five components of the UKIRT Infrared Deep Sky Survey...

astrochemistry, astrobiology, stellar astronomy, galactic astronomy, extragalactic astronomy, and physical cosmology. Astronomers can also specialize in...

November 1863 by Albert Marth. List of NGC objects (1–1000) "NASA/IPAC Extragalactic Database". Results for NGC 0170. Retrieved 2016-09-02. "New General...

Gombola, Paul P. (1988-10-01). "Long-Term Optical Behavior of 144 Compact Extragalactic Objects: 1969-1988". The Astronomical Journal. 96: 1215. Bibcode:1988AJ...

MCG+01-01-037, and CGCG 408–35. NGC 3 by SDSS NGC 3 by DECam "NASA/IPAC Extragalactic Database". Results for NGC 0003. Retrieved 2006-11-04. Seligman, Courtney...

728 and (z) 1.320. "NED search results for HE 1104-1805". NASA/IPAC Extragalactic Database. Retrieved 2025-06-14. "QSO B1104-181". simbad.u-strasbg.fr...

Coma Supercluster. NGC 45 Low-surface-brightness galaxy "NASA/IPAC Extragalactic Database". Results for UGC 6614. Retrieved 2017-07-22. "Your NED Search...

often misidentified as NGC 700. List of NGC objects (1–1000) "NASA/IPAC Extragalactic Database". Results for NGC 700. Retrieved 2018-11-21. "Your NED Search...

astronomiques de Strasbourg. Retrieved 15 October 2014. "NASA/IPAC Extragalactic Database". Results for NGC 4206. Retrieved 2018-07-19. R. B. Tully (1988)...

of NGC objects (4001–5000) "Results for object NGC 4611". NASA/IPAC Extragalactic Database. NASA and Caltech. Retrieved 23 July 2024. Seligman, Courtney...

Retrieved 2025-12-12. "NED Results for [GDS2022] ILT J2336+1842". NASA/IPAC Extragalactic Database. Retrieved 2025-12-12. Duncan, K. J. (2022). "VizieR Online...

discovered around maximum, having an apparent magnitude of 18.1. "NASA/IPAC Extragalactic Database". Results for NGC 2832. Retrieved 2024-03-26. "Revised NGC...

member of the Coma Cluster. List of NGC objects (4001–5000) "NASA/IPAC Extragalactic Database". Results for NGC 4895. Archived from the original on 2011-05-14...

3.8 million light-years away in the constellation Cetus. "NASA/IPAC Extragalactic Database". Results for NGC 0173. Retrieved 2016-09-02. Media related...

around a factor of 3. "NED Search results for J1328+2752". NASA/IPAC Extragalactic Database. Retrieved 2026-03-20. Liu, Xin; Shen, Yue; Strauss, Michael...

open star cluster IC 1590, which is found within NGC 281 "NASA/IPAC Extragalactic Database". Results for NGC 281. Retrieved 2006-10-17. Leass, E. A.;...

Hélène; Vauglin, Isabelle (2014-10-01). "HyperLEDA. III. The catalogue of extragalactic distances". Astronomy & Astrophysics. 570: A13. arXiv:1408.3476. Bibcode:2014A&A...

Strasbourg. Retrieved 11 July 2022. "SMACS J0723.3-7327". NASA/IPAC Extragalactic Database. WRAL (10 July 2022). "SMACS J0723.3-7327". WRAL.com. Retrieved...

McGuire, Brett A. (2018). "2018 Census of Interstellar, Circumstellar, Extragalactic, Protoplanetary Disk, and Exoplanetary Molecules". The Astrophysical...

of NGC objects (5001–6000) "Results for object NGC 5419". NASA/IPAC Extragalactic Database. NASA and Caltech. Retrieved 28 July 2024. Seligman, Courtney...

It was discovered on November 22, 1827, by John Herschel. "NASA/IPAC Extragalactic Database". Results for NGC 0287. Retrieved September 2, 2016. "NGC 287"...

to be 22.48° ± 0.79°. "NED Search results for NGC 7734". NASA/IPAC Extragalactic Database. Retrieved 2025-12-28. "Revised NGC Data for NGC 7734". spider...

Strasbourg. Retrieved 4 July 2026. "Results for object NGC 3981". NASA/IPAC Extragalactic Database. NASA and Caltech. Retrieved 4 July 2026. "A Galactic Gem -...

of NGC objects (4001–5000) "Results for object NGC 4301". NASA/IPAC Extragalactic Database. NASA and Caltech. Retrieved 26 June 2025. Seligman, Courtney...

near ultraluminous infrared galaxies with active nuclei "NASA/IPAC Extragalactic Database". Results for UGC 5101. Retrieved 2023-05-06. Esposito, Federico;...

member of the Coma Cluster. List of NGC objects (4001–5000) "NASA/IPAC Extragalactic Database". Results for NGC 4892. Retrieved November 10, 2018. "HyperLeda...

the Milky Way, but there have also been a few possible detections of extragalactic planets. The study of planetary habitability also considers a wide range...

and narrow. List of NGC objects (4001–5000) Dwarf galaxy "NASA/IPAC Extragalactic Database". Results for NGC 4491. Retrieved 2017-10-21. Roussel, H.;...

narrow-line radio galaxy. "NED Search results for 4C 73.08". NASA/IPAC Extragalactic Database. Retrieved 2026-03-29. [email protected]. "Galactic fireflies"...

1051/0004-6361/201833051. Gaia DR2 record for this source at VizieR. "NASA/IPAC Extragalactic Database (NED)". California Institute of Technology. Retrieved October...

the Durham University Department of Physics, based in the Centre for Extragalactic Astronomy, itself part of the Ogden Centre for Fundamental Physics....

données astronomiques de Strasbourg. Retrieved 2014-05-05. "NASA/IPAC Extragalactic Database". Results for NGC 185. Retrieved 2006-11-29. J. L. Tonry; A...