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2023-08-04 13:29:51

Robert McNees on Nostr: Astronomer Henrietta Swan Leavitt was born OTD in 1868. She established the ...

Astronomer Henrietta Swan Leavitt was born OTD in 1868.

She established the period-luminosity relation for Cepheid variable stars, an essential tool for understanding the scale of our Universe.

Image: Harvard-Smithsonian Center for Astrophysics

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