Beatrice Muriel Hill Tinsley (January 27, 1941 - March 23, 1981) was an astronomer and cosmologist whose research made fundamental contributions to our understanding of how galaxies evolve with time.
Tinsley's career was cut short when she died of skin cancer in 1981.
In 1986 the American Astronomical Society established the BeatriceM. TinsleyPrize for outstanding creative contributions to astronomy or astrophysics.
Tinsley's research on how galaxies change and evolve over time changed the standard method for determining distances to far galaxies which, in turn, was significant in determining the size of the universe and its rate of expansion.
Factors such as the abundances of chemical elements, the mass of the galaxy and the rate of starbirth were all important parameters in determining the distance and age of the galaxy and, by inference, the size and age of the universe.
Beatrice Hill was born in 1941 in Chester, northwest England, the second daughter of an Anglican minister father and writer mother.
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