absolute magnitude
noun/ˌæbsəluːt ˈmæɡnɪtjuːd/
/ˌæbsəluːt ˈmæɡnɪtuːd/
[countable, uncountable] (astronomy)- a measure of how bright a star, planet, etc. is, as it would be seen at a standard distance from the earth compare apparent magnitude
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absolute magnitude