This galaxy is millions of light-year away from us.

这个星系距离我们有几百万光年。

The diameter of the Milky Way is about 100,000 light-year.

银河系的直径大约是10万光年。

Scientists have discovered a planet 500 light-year away from Earth.

科学家们发现了一颗距离地球500光年的行星。

A light-year is a unit used to measure distances in the universe.

光年是用来测量宇宙中距离的单位。

It takes about 4.3 light-year to travel from Earth to the nearest star.

从地球到最近的恒星大约需要4.3光年。

The distance of a light year boggles the imagination.

一光年的距离大得令人难以想象。

Astronomers use light-year to talk about distance in space.

天文学家用光年表示宇宙空间的距离。

And one light year is the distance that light travels in a year . 1.

一光年就是光在一年中传播的距离.

Light Year means the distance that light covers in a year.

光年是指光在一年时间里所跑过的距离。

The Oort Cloud is thought to extend about 1 light year from the Sun.

欧特云团距太阳1光年距离。