Astronomers discover closest known black hole to Earth, Gaia BH1
From the Big Think, November 14, 2022: Gaia BH1 is the closest black hole to Earth that scientists have ever discovered at just 1,600 light years away. Fermilab’s Don Lincoln examines that by looking at the behavior of a star near the black hole, how astronomers might be able to determine the black hole was there, despite never seeing it directly.