NASA's Hubble hunts for intermediate-sized black hole close to home
Astronomers using NASA's Hubble Space Telescope have come up with what they say is some of their best evidence yet for the presence of a rare class of "intermediate-sized" black hole that may be lurking in the heart of the closest globular star cluster to Earth, located 6,000 light-years away.
Like intense gravitational potholes in the fabric of space, virtually all black holes seem to com