The observational fact about a cepheid variable star that leads to a measurement of its distance from earth is that its period of variation is directly related to its

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Jflaflamme · Answer 1 · 2021-05-12T01:27:17+0000

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absolute brightness

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The observational fact about a cepheid variable star that leads to a measurement of its distance from earth is that its period of variation is directly related to its absolute brightness

The observational fact about a cepheid variable star that leads to a measurement of its distance from earth is that its period of variation is directly related to its

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