galaxies

1.Quasars are the highly energetic cores of distant galaxies.

类星体是遥远星的极为活跃的核体。

2.We still don't know how many galaxies there are in the universe.

我们还不知道宇宙中有多少个星。

3.Explanation: Across the heart of the Virgo Galaxy Cluster lies a string of galaxies known as Markarian's Chain.

说明： 贯穿室女座星脏有一条星链，称为马卡林之链。

4.Steidel）事所发展，它能使观测者建立关于遥远星的大量目录，这些星的恒星光也许曾助长了星际气体的再游离。

Steidel of Caltech and his colleagues, has enabled observers to build up sizable catalogues of distant galaxies—whose starlight may have helped reionize intergalactic gas.