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According to Hubble, the color of stars can tell us whether the stars are true - that is, just because you see a red star doesn't mean that it's old!.

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[/caption] Look up into the sky and you'll see the stars twinkling in different colors. Some are dull and red, while others are white and others look.

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Stars are hard to study because, apart from the Sun, they are so far away that they appear as nothing more than geometric points of light.

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Astronomers have long used stars' color to identify their temperature, and they created a classification system called spectral classes to do so.

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Although you can spot many colors of stars in the night sky, purple and green stars aren't seen because of the way humans perceive visible.

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The stars show a multitude of colors, including red, orange, yellow, white, and blue. As we have seen, stars are not all the same color because they do not all.