Abell 754 is a galaxy cluster in the constellation Hydra that was formed from the collision of two smaller clusters. This collision, which began about 300 million years ago, is ongoing, and the system is still disturbed. Eventually, the cluster will reach a level of equilibrium in a few billion years. See also Abell catalogue List of Abell clusters References External links MASSIVE MERGER OF GALAXIES IS THE MOST POWERFUL ON RECORD (NASA) Galaxies rent asunder in huge cosmic collision Galaxy clusters Hydra (constellation) 0754 Abell richness class 2