standard candle

基本解释

By the late 1980s, a suitable standard candle had been indentified: type Ia supernovae.
到上世纪八十年代末，一个合适的标准烛光出现了，它就是Ia型超新星。
Astrophysicists have long thought of the Crab Nebula as a steady “standard candle” in X-ray wavelengths.
天体物理学家们长久以来一直将蟹状星云的X射线波段视作稳定的“标准烛光”。
In principle, one can trace that history back in cosmic time by observing a so-called standard candle, a class of astronomical object whose intrinsic luminosity is uniform.
原理上，我们可以通过观测所谓的标准烛光（一种天体，它的绝对光度是相同的）来追溯宇宙内的历史。

Because RR Lyrae stars have the same average brightness, astronomers use them as standard candle distance indicators.
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a unit of luminous intensity the candela: not in scientific usage because of possible confusion with a former unit (international candle) &rarrsee also candela ,international candle