有关超新星的研究使科学家了解到，追溯到90亿前暗能量就已经开始影响星系。

Supernovae studies have allowed scientists to see that dark energy has been impacting galaxies since as far back as nine billion years ago.

youdao

本页所展示的图片就是这两个星系在几亿年前相互作用的情景，下方的星系ugc 1813正伸手去勾上方的UGC 1810星系外露的胳膊。

What you're seeing on this page is an interaction that occurred a few hundred million years ago, as the lower galaxy (UGC 1813) dived through the outside arms of the upper one (UGC 1810).

youdao

根据美国国家航空和宇宙航行局轨道运行哈勃太空望远镜新收集的数据，大仙女星座的美丽少许源自亿年前与另一星系的嬉戏。

The great Andromeda galaxy owes a bit of its beauty to a dalliance with another galaxy billions of years ago, according to new data gathered with NASA's orbiting Hubble Space Telescope.

youdao