shadenShaden5410 shadenShaden5410

26-06-2017
Geography

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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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Kenuli289 Kenuli289

26-06-2017

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

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