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absolute magnitude

Flag: gbEnglishOxford New American Dictionary
absolute magnitude /ˈˌabsəˈˌl(y)o͞ot ˈmaɡnəˌt(y)o͞od, ˈˌæbsəˈˌl(j)ut ˈmæɡnəˌt(j)ud /
▸ noun Astronomy the magnitude (brightness) of a celestial object as it would be seen at a standard distance of 10 parsecs. Compare with apparent magnitude.