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| intrinsic brightness ： ウィキペディア英語版 |
intrinsic brightness
Astronomers use the term intrinsic brightness to refer to how bright a star would be without the effects of distance or absorption due to interstellar dust or gas. While a bright distant star's apparent brightness might be less than a nearby dim star, due to the inverse square law for brightness, astronomers can discuss its intrinsic brightness meaning how bright the stars would be at a common distance. A star's intrinsic brightness is measured by its absolute magnitude.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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