Vera Rubin saw something unusual in galaxies: outer stars orbit just as quickly as those in the center. She surmised that each galaxy must contain more mass than meets the eye. It was the first observational evidence of dark matter, which today is one of the most studied cosmology topics.
Vera Rubin
Vera Rubin saw something unusual in galaxies: outer stars orbit just as quickly as those in the center. She surmised that each galaxy must contain more mass than meets the eye. It was the first observational evidence of dark matter, which today is one of the most studied cosmology topics.
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