Abell 85 is the remnant of a supernova explosion, which hovers in the night sky at about the size of a full moon and is extremely faint. In the centre of it lies a galaxy cluster with around 500 galaxies, which contains the record number of black holes of different sizes and masses. And in this cluster lies a gigantic galaxy whose stars alone have more than two trillion solar masses, with a huge black hole that is 40 billion times heavier than our sun, making it the most massive that astronomers currently know of in the universe. Because Abell 85 is so faint, I have compiled this image from over 300 5-minute exposures. And yet the galaxy cluster is not recognisable because of the clouds of dust and gas.
Abell 85