Black Holes Unexpectedly Discovered in Globular Clusters M15 and G1

Image Credits for M15: NASA and The Hubble Heritage Team (STScI/AURA)

Image Credits for G1: NASA and Michael Rich (UCLA)

Science Credits: NASA, Roeland Van Der Marel and Joris Gerssen (Space Telescope Science Institute), Puragra Guhathakurta and Ruth Peterson (University of California Observatories/Lick Observatory), Carlton Pryor (Rutgers University), Michael Rich (UCLA), Karl Gebhardt (University of Texas), and Luis Ho (Carnegie Institution of Washington)