BIGGEST BLACK HOLE
The biggest black hole whose mass has so far been properly measured lies at the heart of a galaxy called NGC 1277, 250 million light years from Earth in the constellation of Perseus – and it’s a real whopper. While our own galaxy’s central black hole has an estimated mass of 4.1 million Suns, the black hole in NGC 1277 is around 17 billion solar masses.
Astronomers discover and assess black holes in distant galaxies by measuring the orbits of the stars that surround them. Many have now been found, with masses equivalent to millions or even
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