ab·so·lute mag·ni·tude
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
绝对星等（假定天体在距地球标准距离的地方所测得的亮度等级）