Editing 1933 in science (section)

==Astronomy==
* October 13 – The [[British Interplanetary Society]] is founded.
* [[Walter Baade]] and [[Fritz Zwicky]] invent the concept of the [[neutron star]], a new type of celestial object, suggesting that [[supernova]]e might be created by the collapse of a normal star to form a neutron star.
* Sir [[Arthur Eddington]] publishes ''The Expanding Universe: Astronomy's 'Great Debate', 1900–1931'' in [[Cambridge]].
* Comedian [[Will Hay]] observes the periodic [[Great White Spot]] on [[Saturn]] from his private observatory in London.<ref>{{cite journal|url=http://cdsads.u-strasbg.fr//full/seri/MNRAS/0094//0000085.000.html|title=The spot on Saturn|journal=[[Monthly Notices of the Royal Astronomical Society]]|location=London|volume=94|year=1933|page=85|last=Hay|first=W. T.|accessdate=2017-05-11|bibcode=1933MNRAS..94...85H|doi=10.1093/mnras/94.1.85|doi-access=free}}</ref>
* [[Fritz Zwicky]] postulates the existence of [[dark matter]].<ref>{{cite journal|last=Zwicky|first=F.|bibcode=1933AcHPh...6..110Z|title=Die Rotverschiebung von extragalaktischen Nebeln|year=1933|journal=Helvetica Physica Acta|volume=6|pages=110–127}}</ref>