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'Mathematically perfect' star system discovered 105 light-years from Earth may still be in its infancy. Could that change its prospects for life?Previous studies that used the Hertzsprung-Russell diagram — a tried-and-true chart that traces a star's age through its ...
The brighter the star is overall, the longer the period of luminosity. Since the cepheids ... Leavitt published her findings in 1912 -- in a chart of 25 cepheid periods and their apparent brightness.
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