National Geographic
June 18, 2025 at 10:01 AM
In the 1960s, Vera Rubin noticed something unusual about the Andromeda galaxy's rotation curve. It was an observation that set her on the path to discovering dark matter, a Copernican-esque revelation that forced her fellow astronomers to rethink the universe, while advocating for equality in astronomy.
https://on.natgeo.com/BRWA061825
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