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。

youdao

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。

youdao