A black hole is an area in space with a gravitational force that cannot survive such strong matter, radiation and light.
A stellar black hole is small and is formed when a star collapses. It is about the size of a small town. Then there are supermassive black holes that can be billions of times larger than the Earth’s sun. Galaxies revolve around these.
However, physicist Nelson Christenson, director of research at the French National Center for Scientific Research, found that black holes can actually merge to form stellar black holes 70 times larger than the size of our sun.
“Very large scale black holes merge together and emit gravitational waves as they do so,” Christensen told the Associated Press. “Now we have merged black holes and are already producing gravitational waves, but what is interesting here is that this system is so widespread.”
In May 2019, astronomers detected a signal that was energy from two stellar black holes, one crashing 66 times the mass of our sun and the other 85 times that of our sun. Combined they created a black hole that was 142 times the mass of our sun. The previously observed stellar black hole merger never resulted in this major result.
The collision released a gravitational wave, a space wave that moves at the speed of light – a signal that was heard by astronomers. Yes, Heard. Detectors called LIGO and Virgo converted gravitational waves into audio signals. “Thud” finished tenth of a second.
But here’s the real kicker. The accident is so far away from the Earth that it was blown out 7 billion years ago and astronomers could still find it.
“We have great success today, where we are already looking towards the future in a way that will tell us even more about the universe,” Christensen told The Associated Press. “And I think we have discovered a lot that seems incredible, but we are working hard to keep it going with even more in the future.”
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