Too Many Black Holes in a Single Star Cluster
Palomar 5 Cluster may Entirely Turn into Cluster of Black Holes

Palomar 5 is a ‘fluffy’ cluster, spanning over 20 degrees across the sky and, it has very low density (0.1 times the solar mass over 1 cubic parsec), making it about 3,000 times less dense than average. Recently a study by a group of scientists from Spain, the UK and the…