The ‘ripples’ caused by a huge collision between two black holes in a distant galaxy have reached our planet. Scientists detected gravitational waves from the collision, leading to a new black hole, which is about 80 times bigger than our sun.
It was one of the four detections announced this week. The detections are made using the data collected from the advanced Laser Interferometer Gravitational-wave Observatory (LIGO) that is capable of detecting gravity waves, tiny ripples in space and time.
Professor Susan Scott of Australian National University (ANU) said that the collision has taken place none billion light years away (and nine billion years ago). The ripples were detected on 29 July last year.
‘This event also had black holes spinning the fastest of all mergers observed so far. It is also by far the most distant merger observed,’ Professor Scott said.
This was followed by other three other black-hole collisions which took place between 9 and 23 August 2017. Those collisions occurred between three and six billion light years away and were 56 to 66 times bigger than the Sun.
‘These were from four different binary black hole systems smashing together and radiating strong gravitational waves out into space,’ said Professor Scott.