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Light emitted by stars

  1. Dec 3, 2014 #1
    Is the light from other stars has the same electromagnetic spectrum ?
  2. jcsd
  3. Dec 3, 2014 #2
    No, stars emit a black-body spectrum according to Planck's law, which is temperature dependent. Even then, two stars that are the same temperature can have different absorption and emission lines depending upon the composition as Doug mentioned below.
  4. Dec 3, 2014 #3

    Doug Huffman

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    Same as what other star? Star light exhibits absorption and emission lines in its continuous spectrum. See Fraunhofer.
  5. Dec 4, 2014 #4


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    You can get all sorts of 'colours' of stars, varying from dull red to very blue-white. The spectrum will depend upon the mass of the star and where it happens to be in if life cycle - its surface temperature will depend upon the rate of energy production and its surface area at the time.
    I only refer to the continuous spectrum here, of course.
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