January 13 , 2023
677 days
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- Astronomers observed two merging galaxies about 500 million light-years from Earth.
- The two black holes were growing in cycle near the centre of the merging galaxy resulting from the merger.
- They met when their host galaxies, known as UGC 4211, collided.
- One is 200 million times the mass of our sun, while the other is 125 million times the mass of our sun.
- The black holes are located the closest together scientists have ever seen, only about 750 light-years apart.
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