Researchers then compare the supernova's intrinsic brightness with its reduced brightness as viewed from Earth.
研究人员然后将超新星的固有亮度跟从地球上所看到的减弱后的亮度作以对比。
That method involves searching for celestial objects, called "standard candles", whose intrinsic brightness is known.
这种方法的具体做法是找到被称为“标准烛光”的天体，这一类天体的固定亮度是已知的。
Type Ia supernovae all explode with nearly the same amount of energy and therefore have almost the same intrinsic brightness.
Ia超新星爆发时辐射的能量几乎相等，因而具有几乎相同的本征亮度。
The supernovae glow with the same intrinsic brightness, so by measuring how bright they appear on the sky, astronomers can tell how far away they are.
这些超新星有着一致的本征亮度，因此测出它们的视亮度，天文学家就知道它们离我们有多远。
Cepheids are reliable cosmic distance mileposts. The interval it takes for the Cepheid to complete one pulsation is a direct indication of the stars'; s intrinsic brightness.
造父变星是可靠的宇宙距离(测量)里程碑，其完整的一个光变周期直接反映了星体的本质光亮度。
Cepheids are reliable cosmic distance mileposts. The interval it takes for the Cepheid to complete one pulsation is a direct indication of the stars'; s intrinsic brightness.
造父变星是可靠的宇宙距离(测量)里程碑，其完整的一个光变周期直接反映了星体的本质光亮度。
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