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Definition of Absolute magnitude
1. Noun. (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.
Definition of Absolute magnitude
1. Noun. (context: astronomy) The intrinsic luminosity,x that a celestial body would have if viewed from a distance of 10 parsecs. ¹
¹ Source: wiktionary.com