How are distances in the Universe determined using Cepheids?

bystudin | October 29, 2020 | Education

There is an unambiguous connection between the period of the change in the brightness of the Cepheid and its luminosity. By measuring the period of change in the brightness of the Cepheid, you can establish its absolute stellar magnitude, then, based on a comparison of the apparent and absolute stellar magnitudes, you can determine
distance to the Cepheid.

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