Abell 2744-QSO1
Abell 2744-QSO1 (abbreviated as QSO1) is a 50-million-stellar-mass supermassive black hole (technically an active galactic nucleus) traveling through space almost by itself, located approximately 13 billion years ago in the epoch of re-ionisation behind the galaxy cluster Abell 2744. It is surrounded by a very small galaxy, with very tight upper limits on its stellar mass; the matter surrounding it comprises mostly hydrogen and helium, with very few of the heavier elements which are created by stars, etc.