The year 1924 in science and technology involved some significant events, listed below.
Astronomy and space exploration
November 23 – Edwin Hubble announces his discovery that Andromeda, previously believed to be a nebula, is actually another galaxy, and that the Milky Way is only one of many such galaxies in the universe.[1]
^L. Vaillard, Agathe Floderer, Alexandre Wauthier. "Vallin Émile Arthur". cths.fr (in French). Comité des travaux historiques et scientifiques. Retrieved 11 February 2021.((cite web)): CS1 maint: multiple names: authors list (link)