Solar eclipse of June 30, 1973 – Very long total solar eclipse visible in NE South America, the Atlantic, and central Africa. During the entire Second Millennium, only seven total solar eclipses exceed seven minutes of totality; this is the last. Observers aboard a Concorde jet are able to stretch totality to about 74 minutes by flying along the path of the moon's umbra.
September – The TV Typewriter appears on the cover of Radio-Electronics. Designed by Don Lancaster, it is a video terminal that can display two pages of 16 lines of 32 upper case characters on a standard television set.
The American Psychiatric Association publishes the 1st edition of its Principles of Medical Ethics, incorporating the 'Goldwater rule' (that it is unethical for a psychiatrist to offer a professional opinion on an individual in the public eye without an examination and consent).[12]
Ichiro Kato, Waseda University, develops the world's first full-scale humanoid robot, Wabot-1.[14]
Institutions
March 6 – The Montenegrin Academy of Sciences and Arts, founded as the Montenegrin Society for Science and Arts (Crnogorsko društvo za nauku i umjetnost), elects its first members.[15]