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Many objects in the universe which are warm, like Earth, emit most of their radiation in infrared, not visible, wavelengths, so astronomers can only observe them using special infrared detectors attached to telescopes. F
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Document Date: 2011-10-17 17:47:38
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Many objects in the universe which are warm, like Earth, emit most of their radiation in infrared, not visible, wavelengths, so astronomers can only observe them using special infrared detectors attached to telescopes. F