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Astronomers can find the distance to an object if they know the object's true brightness. one way they regularly estimate the true brightness of a galaxy is to observe
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Astronomers can find the distance to an object if they know the object's true brightness. one way they regularly estimate the true brightness of a galaxy is to observe

User Arjun Komath
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Yes that is true that astronomers can find the distance to an objet if they know the object's true brightness.

User Ab Bennett
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