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What Is Apparent Magnitude and How Do Astronomers Measure a Star’s Apparent Magnitude?

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What Is Apparent Magnitude and How Do Astronomers Measure a Star’s Apparent Magnitude?

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Apparent magnitude, or how bright a star appears when we look at it, is always defined in comparison to another star. An increase in apparent magnitude by a factor of 1 means that a star is 2.5 times brighter than another star. The star Rigel appears brighter than the star Pollux; Rigel has an apparent magnitude of 0.12 and Poll

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