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ShareA Cepheid variable or Cepheid is a member of a particular class of variable stars, notable for a fairly tight correlation between their period of variability and absolute luminosity.
Since the period-luminosity relation can be calibrated with great precision using the nearest Cepheid stars, the distances found with this method are among the most accurate available.
For more information about the topic Cepheid variable, read the full article at Wikipedia.org, or see the following related articles:
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