Astronomers spotted an unexpected trail in the gas surrounding a dwarf galaxy while using the Hubble Space Telescope. During the team’s observations, a trail of an ejected supermassive black hole is believed to have been detected. The light emitting from the trail traveled more than 7.5 billion years to reach Earth and is thought to be traveling

Source: Hot Hardware – Supermassive Black Hole Streaks Across The Galaxy, Leaving Trail Of Gas And Stars