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]
E. C. Stoner publishes a paper[11] pointing out that for a given value of the principal quantum number (n), the number of energy levels of a single electron in the alkali metal spectra in an external magnetic field, where all degenerate energy levels are separated, is equal to the number of electrons in the closed shell of the rare gases for the same value of n. This leads to discovery of the Pauli exclusion principle which Wolfgang Pauli first proposes in a letter at the end of the year.
^In The New York Times. Sharov, Aleksandr Sergeevich; Novikov, Igor Dmitrievich (1993). Edwin Hubble, the discoverer of the big bang universe. Cambridge University Press. p. 34. ISBN978-0-521-41617-7. Retrieved 2011-12-31. Formally published December 30 and presented as a paper at the January 1, 1925 meeting of the American Astronomical Society. Bartusiak, Marcia (2010). The Day We Found the Universe. Random House. pp. x–xi. ISBN9780307276605.
^"Artificial Wombs Are Coming, but the Controversy Is Already Here". Motherboard. 4 August 2014. Retrieved 16 November 2014.
^James, David N. (1987). "Ectogenesis: A Reply to Singer and Wells". Bioethics. 1 (1): 80–99. doi:10.1111/j.1467-8519.1987.tb00006.x. PMID 11649763.
^Russell, Ben (2014). James Watt: making the world anew. London: Reaktion Books. ISBN978-1-78023-375-8.
^Banach, Stefan; Tarski, Alfred (1924). "Sur la décomposition des ensembles de points en parties respectivement congruentes" (PDF). Fundamenta Mathematicae. 6: 244–277. doi:10.4064/fm-6-1-244-277.
^Haas, L. F. (2003). "Hans Berger (1873-1941), Richard Caton (1842-1926) and electroencephalography". Journal of Neurology, Neurosurgery & Psychiatry. 74 (1): 9. doi:10.1136/jnnp.74.1.9. PMC1738204. PMID 12486257.
^"Band-Aid Brand: A History of Innovation". September 28, 2023.
^Dart, Raymond A. (February 1925). "Australopithecus africanus: The Man-Ape of South Africa" (PDF). Nature. 115 (2884): 195–99. Bibcode:1925Natur.115..195D. doi:10.1038/115195a0.
^Stoner, E. C. (1924). "The distribution of electrons among atomic levels". Philosophical Magazine. 6th ser. 48 (286): 719–736. doi:10.1080/14786442408634535.
^"Louis de Broglie: The Nobel Prize in Physics 1929". Nobel Lectures, Physics 1922–1941. Elsevier. 1965. Retrieved 2007-02-28.
^"Landmark Dates". British TV History. Archived from the original on 1 November 2010. Retrieved 2010-10-12.
^"Kleenex Brand Story". September 28, 2023.
^L. Vaillard; Agathe Floderer; Alexandre Wauthier. "Vallin Émile Arthur". cths.fr (in French). Comité des travaux historiques et scientifiques. Retrieved 11 February 2021.