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Variable star

  1. Jun 25, 2005 #1
    why variable stars have various magnitudes? and y they are changing periodically?
  2. jcsd
  3. Jun 25, 2005 #2


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    It would take all day to answer that question - try here, then Google on "variable star" if you need more information.

  4. Jun 25, 2005 #3


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