Some black holes at the centers of galaxies have a buddy − but detecting these binary pairs isn’t easy

Some black holes at the centers of galaxies have a buddy − but detecting these binary pairs isn’t easy

Source: space
Source Link: https://www.space.com/the-universe/some-black-holes-at-the-centers-of-galaxies-have-a-buddy-but-detecting-these-binary-pairs-isnt-easy