A research team has discovered that the more massive black holes tend to be located in galactic environments with higher density, thus indicating that galaxies in a dense area often merge together, causing the growth of massive black holes.
All large galaxies have a massive black hole at their centre, each millions of times the mass of a single star.
The find of supermassive black holes growing in surprisingly small galaxies suggest that central black holes form at an early stage in galaxy evolution.
Day in Pics: 23rd November
Showbiz World - November 23, 2014
Los Angeles Auto Show