2 supermassive black holes may collide 100 years from now ‪—‬ and Earth would feel it

In a galaxy 500 million light-years away, two supermassive black holes could merge, spreading gravitational waves across the universe.

2 supermassive black holes may collide 100 years from now ‪—‬ and Earth would feel it
In a galaxy 500 million light-years away, two supermassive black holes could merge, spreading gravitational waves across the universe.

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