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Last Post 3/17/2008 9:58 AM by  Terry Kucera
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3/17/2008 8:51 AM

    jennifer (LM)

    why do stars have different colors?


    Terry Kucera



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    Posts:328
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    3/17/2008 9:58 AM

    Hi Jennifer!

    Stars have different colors because stars have different temperatures - the temperature of the star determins the star's color.

    The coolest stars are reddish - so they are still red hot! Hotter stars are yellow, white then even blue. Basically it takes more energy to put out blue light than red light, so you need a hotter star.

    There is more about that here, with some examples:
    http://www.kidsastronomy.com/stars.htm

    Terry

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