NGC 4676: When Mice Collide . ... Credit Copyright: ACS Science Engineering Team , NASA Explanation: These two mighty galaxies are pulling each other apart. ... They will probably collide again and again until they coalesce. The long tails are created by the relative difference between gravitational pulls on the near and far parts of each galaxy. ... NGC 4676 lies about 300 million light-years away toward the constellation of Coma Berenices and are likely members of the Coma Cluster of Galaxies . ...