Closest known black hole to Earth discovered after years-long hunt

INA - SOURCES 

Astronomers have reportedly discovered the closest-known black hole to Earth.

BH1 was located about 1,600 light-years away in the constellation Ophiuchus, making it three times nearer to Earth than the previous record holder. 

The dormant black hole is about 10 times more massive than the sun, according to astronomers using the International Gemini Observatory. The observatory is operated by the National Science Foundation. 

There are an estimated 100 million stellar-mass black holes in the Milky Way alone, with nearly all of them active.