(MEDIA GENERAL) – The Hubble Space Telescope has captured pictures of green ghosts believed to be part of past galaxies that once collided violently in space.
The Hubble scientists released the images Thursday. The green wisps in the pictures are thought to have been lit up by the blast of a quasar. A quasar is a very bright region surrounding a supermassive black hole at the center of a galaxy.
The quasar’s light would have taken tens of thousands of years to reach the green objects and illuminate them, according to scientists. The unmistakable emerald color is caused by ionized oxygen which glows green.
The structures, that look “ghostly” according to scientists, are huge. They span tens of thousands of light-years. Hubble scientists report the green images are thought to be long tails of gas formed when galaxies merged violently a long time ago.