Black Hole Closest to Earth Discovered, a 'Silent' Whose Companion Stars Are Visible to Naked Eye: ESO

The black hole is located in the constellation of Telescopium, and the HR 6819 system is so close to Earth that it can be viewed without binoculars or telescope from the southern hemisphere on a dark, clear night.

from Gadgets 360 https://ift.tt/3ccRxn8