Astronomers at Ohio State University have discovered what they say is the closest-known black hole to Earth, 1,500 light-years away, dubbing it “the Unicorn.”

The nickname for the stellar-mass black hole serves as a double meaning because it resides in the constellation Monoceros, which is Greek for “unicorn.” The name was also given due to its notably low mass for a black hole, which is still 3 times that of the sun in our solar system, making it essentially one of a kind.