Meaning of absolute magnitude

ab'solute mag'nitude

Pronunciation: [key]
— Astron. Astron.
  1. the magnitude of a star as it would appear to a hypothetical observer at a distance of 10 parsecs or 32.6 light-years. Cf. apparent magnitude.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.
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