早期恒星体的年龄都不到100万年。
The young stellar objects are all less than about 1 million years old.
在与我们太阳相似的恒星当中，有四分之一都存在于多恒星体系。
Or a planet with two stars may have one sun-like star, along with a red dwarf star that’s also common in multi-star systems.
如果你想知道一个行星到底有多大，那么，你就要确切地知道那颗光线被阻断了的恒星体积的大小。
If you want to know exactly how big a planet is, you need to know exactly how big the star is whose light it's blocking.
应用推荐