Quasars are the highly energetic cores of distant galaxies.
类体是遥远系极核心体。
Quasars are the highly energetic cores of distant galaxies.
类体是遥远系极核心体。
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系。
Explanation: Across the heart of the Virgo Galaxy Cluster lies a string of galaxies known as Markarian's Chain.
说明: 贯穿室女座系团心脏有一条系链,称马卡林之链。
Steidel)及其同事所发展,它能使观测者建立关于遥远系大量目录,这些系光也许曾助长了系际气体再游离。
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.
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