Vera Rubin was a renowned American astronomer known for her groundbreaking work in the field of astrophysics, particularly in the study of galaxy rotation curves. Born on July 23, 1928, she made significant contributions to our understanding of dark matter, a form of matter that does not emit light or energy and is not directly observable, yet is believed to make up a substantial portion of the total mass in the universe. Rubin's most notable work involved observing the rotational speeds of galaxies.

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