5 years ago
Astronomers discover two supermassive black holes in a death spiral
Using images obtained from the Hubble Space Telescope, a US collaboration of astronomers have detected two supermassive black holes on a collision course, 2.5 billion light years from Earth. The two black holes will continue to get closer to each other sending out huge ripples in space-time, known as gravitational waves, which can be detected back on Earth. Though we're not likely to detect their signal for billions of years, they will help astronomers gain a better understanding of these enormous ripples.
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