Vera Rubin, pioneering U.S. dark matter astronomer, dies at 88

Rubin died on Sunday at an assisted living facility in Princeton, New Jersey, and had suffered from dementia for several years, Allan Rubin, a geosciences professor at Princeton University, said in an email. Rubin, a Philadelphia native, used galaxies’ rotations to discover the first direct evidence of dark matter in the 1970s while working at the Carnegie Institution in Washington.

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Vera Rubin, pioneering U.S. dark matter astronomer, dies at 88