Social Studies, 17.03.2020 00:59 tessthetoast
An astronomer observes a nearby Cepheid at a distance of 1000 light-years and a Cepheid in M31. The two Cepheids have the same pulsation period. The nearby Cepheid appears 4 million times brighter than the Cepheid in M31. What is the distance of the Cepheid in M31
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An astronomer observes a nearby Cepheid at a distance of 1000 light-years and a Cepheid in M31. The...
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