 This Hubble Space Telescope archival photo captures a curious linear feature that is so unusual It was first dismissed as an imaging artifact from Hubble's cameras But follow-up spectroscopic observations Reveal it as a 200,000 light-year long chain of young blue stars a Supermassive black hole lies at the tip of the bridge at the lower left The black hole was ejected from the galaxy at the upper right. It compressed the gas in its wake Triggering the development of the young stars