July 11 – America's first space station, Skylab, is deliberately allowed to burn up on atmospheric entry over the Indian Ocean due to its decaying orbit and the lack of time to build a new spaceship to boost it up.
September 1 – The American Pioneer 11 becomes the first spacecraft to visit Saturn when it passes the planet at a distance of 21,000 km.
December 24 – The maiden launch of Ariane 1, the first rocket in the Ariane launcher family.
^Palmer, Robert (December 2004). "Bulimia nervosa: 25 years on". British Journal of Psychiatry. 185 (6): 447–8. doi:10.1192/bjp.185.6.447. PMID 15572732.
^"Smallpox". WHO Factsheet. Archived from the original on 2007-09-21. Retrieved 2007-09-22.
^The Biographical Encyclopedia of Astronomers. New York: Springer. 2007. ISBN 9780387304007.