He saw clusters of stars, brightly colored nebulas, even entire galaxies!

他看到了无数星团，明亮的星云，甚至还看到了整个银河！

Well, uh, you see that, that little cluster of stars next to the big one? That is Ursa Major.

你看那边，那一大团旁边那一小堆星星，那就是大熊座。

In 1995, a group of astronomers was observing the Pleiades, a nearby cluster of stars that's visible to the naked eye.

1995年，一组天文学家正在观测昴宿星团，这是地球附近肉眼可见的星团。

Well, uh, you see that little cluster of stars next to the big one?

你看到那个大星云 旁边的小星云了吗？

They knew that the Sun was born in a cluster of stars that split up after about 10 million years.

他们知道太阳诞生于大约 1000 万年后分裂的星团中。

Those pictures we have made up for the clusters of stars only make sense from this point of view down here.

我们为星团制作的那些图片只有从这里的这个角度来看才有意义。

The notion of a galaxy, a gravitationally bound cluster of stars and dust and dark matter, didn't exist at the time.

星系的概念，一个由恒星、尘埃和暗物质组成的受引力束缚的星团，在当时并不存在。

When that cluster of stars dissipated into the galaxy, the orbit of Sedna would have been left as a fossil record of this earliest history of the Sun.

当那群恒星消散到银河系中时，塞德娜的轨道将作为太阳最早历史的化石记录而留下。

To be honest, we don't even have a good enough definition of what a galaxy is to know when to stop calling something a cluster of stars and when to start calling it a galaxy.

老实讲，我们甚至对恒星群和星系没有一个好的定义。

Consisting of mainly ancient stars from around 12 billion years ago, the Segue 1 contains around 1,000 star systems. Astronomers aren't sure if it's a true galaxy, or even a globular cluster of stars, because it doesn't fit the profile.

Segue 1 主要由大约 120 亿年前的古老恒星组成， 包含大约 1,000 个恒星系统。 天文学家不确定它是否是一个真正的星系， 甚至是一个球状星团， 因为它不符合轮廓。