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TWO black holes merging billions of light years away created a blast equal to the energy of eight suns and sent a “massive gravitational wave source” through the universe that was detected by an international team.

Scientists from the National Science Foundation’s Laser Interferometer Gravitational-wave Observatory (LIGO) in America, and the Virgo detector in Italy, have released a paper on the cosmic phenomena.

The gravitational wave detectors picked up the signal, which came from two black holes merging 17 billion light years away from Earth, making it one of the most remote waves ever detected.

The first black hole was around 85 times greater than the mass of the Sun, and the second around 66 times.

The first such gravitational waves were detected in 2015. Before detectors such as LIGO and Virgo were in place, scientists could only indirectly observe them through their effects on celestial bodies.

Scientists from the University of Glasgow assisted with the data analysis process, and Daniel Williams, from the Physics and Astronomy Department, said: “Gravitational wave astronomy continues to help us answer questions about how our universe works, as well as present us with exciting new problems to solve.

“This detection gives us a fascinating first look at the physics of intermediate-mass black holes, and opens up the opportunity for future detections to solve the mystery of just how they are formed.”

He said that, given the size of the black holes before they merged, they could have already been the products of previous mergers.

He added: “It’s also possible that black holes of this size might have been formed by stripping gas from other nearby stars to add to their own mass before they collided with each other.

“We’re very much looking forward to finding more pieces of this puzzle in future detections.”

Professor Sheila Rowan, director of the University of Glasgow’s Institute for Gravitational Research, said: “One of the lessons we’ve learned since the first LIGO observing run is the importance of being able to pause occasionally to upgrade the instruments and improve their sensitivity. It translates into more detections, an improved rate of detections, and also detections of individual events made at higher sensitivities. That enables detections like this one, where the very low frequency of the signal might well have been impossible to pick out of the background noise without our improvements.

“It’s an exciting preview of the kinds of science we can look forward to as we continue to develop the new field of gravitational wave astronomy.”

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Source: https://www.thenational.scot/news/18693283.merging-black-holes-detected-17-billion-light-years-earth/

World news – GB – Merging of black holes detected 17 billion light years from Earth

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