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Andrew Fraknoi
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Semi-retired astronomer, college professor, lead author of a free, open-source textbook (OpenStax Astronomy), and science fiction writer with 8 stories published so far. See
fraknoi.com
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November 2024
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Andrew Fraknoi
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May 10
Today is the birthday (in 1900) of Cecilia Payne, the astronomer who wrote what some historians call the most important PhD thesis in astronomy -- showing that stars were made mostly of hydrogen and helium.
#astronomy
#astroedu
#astronomyhistory
#historyofscience
#womenastronomers
#womeninscience
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