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Alnitak Region with the Horse Head and Flame Nebulae
by Warren Keller
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Check out our Nature Blog - http://ift.tt/2x0nwBr
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Check out our Nature Blog - http://ift.tt/2x0nwBr
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The blue part of the flame is hotter than the red. Thus, blue stars in the universe are much hotter than the red stars.
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