HLX-1 was discovered in 2009 by Dr. Sean Farrell of the Sydney Institute for Astronomy in Australia and the University of Leicester, UK. It weighs in around 20 000 times the mass of the Sun and lies towards the edge of galaxy ESO 243-49, which is 290 million light-years from Earth. Now, Dr. Farrell and his team have studied this black hole in ultraviolet, visible and infrared light using Hubble, and simultaneously in X-rays using the Swift spacecraft.
