“It is hoped that systematic study of the light changes of all the variables, nearly two thousand in number, in the two Magellanic Clouds may soon be undertaken at this Observatory.”

—  Henrietta Swan Leavitt

Periods of 25 Variable Stars in the Small Magellanic Cloud http://adsabs.harvard.edu/abs/1912HarCi.173....1L (1912)

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Henrietta Swan Leavitt photo
Henrietta Swan Leavitt 8
astronomer 1868–1921

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