December 7

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Better Than News

Beyond Plausible

In Other Words

Are You Sure

... that astronomer and astrophysicist Cecilia Payne-Gaposchkin (10 May 1900 – 7 December 1979) established, in her doctoral thesis, that hydrogen is the overwhelming constituent of stars, and accordingly the most abundant element in the universe?

Selected Anniversaries

Topic of the Day

Dune