Astronomers have discovered the closest known black hole to Earth, which is 1,600 light-years away and is 10 times larger than the sun, according to a new study published on Nov. 4. The stellar-mass black hole, dubbed “Gaia BH1,” is located in the constellation Ophiuchus, according to the U.S.-based National Optical-Infrared Astronomy Research Laboratory (NOIRLab)….