When one is firing, its brightness can exceed a thousand normal galaxies.

当一个类星体爆发时，它的亮度可以超越一千个常规的星系。

youdao

Centaurus a is apparently the result of a collision of two otherwise normal galaxies resulting in a fantastic jumble of star clusters and imposing dark dust lanes.

半人马a可能是另两个正常星系碰撞的结果，碰撞产生了奇特的混杂星团和雄伟的暗尘带。

youdao

It was no coincidence that the announcements of the two findings — distant quasars and normal galaxies — were made together at a meeting of the American Astronomical Society (AAS) Jan. 9.

在1月9日，美国天文学会的一次会议上，两个发现——关于遥远的类星体和常规的星系——被同时公布，这并不是巧合。

youdao

If it were all normal, there would be far less collapse, and in all probability no galaxies (so, once again, no humans).

ECONOMIST: Astronomy

The analysis of the CMB data, released last Thursday, indicates that only 15.5% of the Universe's matter is what we would call "normal" - that is, the atomic material from which planets, stars and galaxies are built.

BBC: Planck telescope: A map of all the 'stuff' in the cosmos