The physicist Fabian reasoned that as intergalactic gas cools, the cooler gas shrinks inward toward the center of the galaxy.
物理学家费边推断，当星系间的气体冷却时，较冷的气体向星系中心收缩。
Meanwhile, its place is taken by hotter intergalactic gas from farther out on the edge of the galaxy, which cools as it is compressed and flows into the galaxy.
与此同时，它的位置被更热的星系间气体所取代，这些气体来自更远的星系边缘，在被压缩的过程中冷却并流入星系。
What's happening out there is that intergalactic gas has concentrated around a cluster of galaxies, forming a cloud.
那里的星际气体已集中在星系群周围形成了云层。
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