Henrietta Swan Leavitt’s period-luminosity relation for Cepheid variable stars allowed Edwin Hubble (building on work by Vesto Slipher, and relying on contributions by others) to establish that so-called “spiral nebulae” were in fact separate galaxies outside our Milky Way.
https://mastodon.social/@mcnees/111681499901380126
Robert McNees
npub188…73emc
2024-08-04 17:05:46 UTC
in reply to nevent1q…9d63
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2024-08-04 17:05:46 UTCEvent JSON
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