Mar 29, 2018

Henrietta Swan Leavitt

Henrietta Swan Leavitt
Henrietta Swan Leavitt studied the patterns of Cepheid stars in the Magellanic Clouds.  She worked from photographs on glass plates taken from an observatory in Peru.  She was able to correlate the size and brightness of these variable stars to the duration of their cycle. Her research lead to our understanding of distance of stars and galaxies from Earth.

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