“How stars move tell us that most matter in the universe is dark. When we see stars in the sky, we're only seeing five or 10 percent of the matter that there is in the universe.”

— Vera Rubin

As quoted in Pontifical Science Academy http://www.ewtn.com/library/ISSUES/STELLAR.TXT

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Vera Rubin 9

American astronomer 1928–2016

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