How do Cepheid variables indicate distance?

How do Cepheid variables indicate distance? Roger BradyTamal, California Cepheid variables are a type of star that undergo regular pulsations. The length of a Cepheid’s pulsations is always related to its intrinsic, or absolute, brightness in a simple way: The longer its pulsations last, the larger and brighter the star. This means that if youContinue reading “How do Cepheid variables indicate distance?”
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