Supermassive black holes in the galaxy UGC 4211, MUSE image. These two supermassive black holes on the verge of merging, separated by just 750 lightyears. Bright light is emitted as black holes engulf material in their vicinity. At left is a classical view of this galaxy, with dust lanes obscuring starlight. At right emissions from oxygen (blue), nitrogen (green) and hydrogen (red) are shown. Red indicates areas of star formation, and the bright white central region indicates the presence of two supermassive black holes swallowing material from their surroundings. These black holes likely found each other when their host galaxies collided and merged. Image made using data from the Multi Unit Spectroscopic Explorer (MUSE) instrument, a component of the European Southern Observatory's (ESO) Very Large Telescope (VLT).