The distant galaxy 3C 297 apparently was once in a cluster but merged with its neighbors.
Annotated image of the galaxy 3C 297, which lies about 9.2 billion light-years from Earth. The galaxy is lonelier than expected after it likely pulled in and absorbed its former companion galaxies.
3C 297 is now being referred to as a"fossil group" because it appears to be the final phase of a merger involving multiplethat were once part of a cluster. It is also the most distant fossil group ever discovered. Missaglia and her research team saw that this solo body of stars behaves like a group in several ways. For example, it is shrouded in clouds of scorching gas that are tens of millions of degrees — not the norm for a lone galaxy, but common for a cluster.
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