Runaway black hole leaves trail of stars captured by Hubble.

The Hubble Space Telescope has accidentally discovered a runaway supermassive black hole that is creating a trail of stars behind it. The black hole, estimated to be 20 million times more massive than the Sun, was ejected from its host galaxy after colliding with two other supermassive black holes. The phenomenon was spotted in an image captured by the Hubble Space Telescope, and the team is now on the lookout for more of these newborn star streaks in space.