NASA’s Hubble Telescope discovers closest black hole to Earth – changing our understanding of space Digital Camera WorldHubble Space Telescope finds closest massive black hole to Earth — a cosmic clue frozen in time Space.comAstronomers spot a mysterious black hole nestled in a cluster of stars. NPRStrongest “missing link” in black hole physics discovered at last Big ThinkAfter a 20-Year Search, Scientists Found the Middle-Child Black Hole in the Milky Way Popular Mechanics