Lonely Galaxy Devours Its Companions, Becomes Isolated.

Galaxy 3C 297, located 9.2 billion light-years from Earth, is now a "fossil group" as it appears to have devoured all the other galaxies that once surrounded it. The galaxy is shrouded in clouds of scorching gas, which is common for a cluster, and its active galactic nucleus (AGN) suggests that it interacted with gas surrounding 3C 297, indicating a former cluster. However, it is unclear how the system could have evolved this way in such a relatively short time frame, challenging our ideas of cosmology.