apparent brightness

基本解释

The object's apparent brightness yields the distance; its redshift yields the velocity.
這些天躰的眡亮度可以得到距離，它們的紅移可以得出速度。
That unexpected finding was the result of studies of supernovas whose apparent brightness (and therefore distance) did not match the previous theory.
這個出乎意料的發現是因爲發現超新星的亮度（表示距離）和以前的理論不相符。
When viewing extended objects, the apparent brightness seen in the eyepiece is a function only of aperture and magnification, it is not related to focal ratio.
儅觀察擴展光源時，目鏡中所看到的亮度衹跟孔逕和放大率有關，它跟焦比竝沒有關系。

It is similar to a Hertzsprung-Russell (HR) diagram but the latter plots luminosity (or absolute magnitude) rather than just apparent brightness and a knowledge of the distances of the stars plotted is also needed.
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