absolute magnitude

Noun
  1. (astronomy) the magnitude that a star would have if it were viewed from a distance of 10 parsecs (32.62 light years) from the earth (synset 105098183)
    referred to in: astronomy, uranology - the branch of physics that studies celestial bodies and the universe as a whole
    is a type of: magnitude - the property of relative size or extent (whether large or small)

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