FULL AT Hime Marie Hime’s Cleaning House
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Dr. Manuela Rossol
@astromonocyte
#OTD in 1900, astronomer Cecilia Payne-Gaposchkin was born. She proposed in her 1925 doctoral thesis that stars were composed primarily of hydrogen and helium. #WomenInSTEM #WomenInScience Smithsonian Institution Archives
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1:12 PM – May 10, 2020
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