Black Holes
Everything Everywhere Daily
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The Origins of the Black Hole
In 1971, Cygnus X-1 was the first black hole to be discovered. Black holes are hundreds of thousands to billions of times more massive than our Sun. LIGO Gravitational Observatory measured gravitational waves from a black hole merger for the first time in 2015. The largest black hole which has been discovered is at the center of the galaxy Home 15A - 700 million light-years from Earth.
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