Astronomers have found a smaller, stellar-mass black hole lurking in a nearby satellite galaxy of our own Milky Way. The black hole has been hiding in a star cluster named NGC 1850, which is one of the brightest star clusters in the Large Magellanic Cloud. The black hole is 160,000 light-years away from Earth, and is estimated to be about 11 times the mass of our Sun. Using the European Southern Observatory’s Very Large Telescope in Chile, astronomers found the black hole when they noticed a star with a peculiar motion among the star cluster, where other stars weren’t behaving the same way. Further investigation revealed the gravitational influence came from a stellar mass black hole. This is the first time astronomers have used this detection method to reveal the presence of a black hole outside of our galaxy. Astronomers say this method could be helpful in locating other hidden black holes in the Milky Way and nearby galaxies, and it can also help shed light on how these ...