Editing 1920 in science (section)

==Astronomy and space science==
* January 13 – ''[[The New York Times]]'' ridicules rocket scientist [[Robert H. Goddard]], stating that [[spaceflight]] is impossible. In 1969, with [[Apollo 11]] on its way to the Moon, the newspaper will publicly retract this position.<ref>{{cite web|url=http://www.astronauticsnow.com/history/goddard/index.html|title=Robert H. Goddard Story|work=astronauticsnow|accessdate=2019-07-19}}</ref>
* December 13 – The red giant star [[Betelgeuse]] is the first to have its diameter determined by an optical [[astronomical interferometer]], the [[Michelson stellar interferometer]] on [[Mount Wilson Observatory]]'s reflector telescope.<ref>{{cite journal|last1=Michelson|first1=Albert Abraham|last2=Pease|first2=Francis G.|title=Measurement of the diameter of alpha Orionis with the interferometer|journal=[[Astrophysical Journal]]|year=1921|volume=53|issue=5|pages=249–59|type =PDF|doi=10.1086/142603|pmc=<!--none-->|bibcode=1921ApJ....53..249M}}</ref>