The closest black hole to Earth has been discovered. Free Technical Library News

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Found the closest black hole to Earth

12.05.2020

The European Southern Observatory (ESO) announces an important discovery: the closest black hole to us known to date has been discovered.

The object is located at a distance of approximately 1000 light years from Earth. Curiously, this black hole is part of a triple star system that is visible to the naked eye.

This is a system with the designation HR 6819, which is located in the constellation of the Telescope. To study this structure, the FEROS spectrograph was used on the 2,2-meter MPG/ESO telescope at ESO's La Silla Observatory in Chile.

It turned out that one of the two visible stars revolves around an invisible companion in 40 days, and the second is at a great distance from this inner pair. Observations have shown that the mysterious invisible object is a black hole. Its mass is estimated to be at least four solar masses.

The hidden black hole in HR 6819 is one of the very first stellar-mass black holes discovered that do not actively interact with their surroundings and therefore remain truly black.

Experts say that the significance of the discovery is difficult to overestimate. The discovery of this "sleeping" invisible black hole gives clues to where other hidden black holes in the Milky Way might be.

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