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)