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True or false The closer a star is to Earth the brighter it is.?
Wiki User
∙ 14y ago
Half true; distance is only one of three factors affecting the apparent brightness of a star.
For example, the closest star to our Sun is Proxima Centauri, at 4.2 light years. However, Proxima Centauri is too dim to be seen without a telescope.
The other two factors in apparent magnitude is the star's absolute magnitude, how bright it is REALLY. Some really bright giant stars like Betelgeuse are millions of times larger and hundreds of times more massive.
And finally, no matter how bright a star is, if there are clouds of dust and gas in the way, the star will appear much dimer than it should.
Wiki User
∙ 14y ago
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