Earlier this year the research team of Advanced Laser Interferometer Gravitational Waves Observatory (LIGO) made headlines when they were able to record gravitational wave for the first time in the history of Mankind. Albert Einstein predicted the existence of gravitational wave around 60 years ago. This breakthrough discovery of gravitational wave introduced us with the universe and cosmos in a different way.
This week, the team of LIGO announced that they have detected gravitational wave for the second time. This time the gravitational wave was resulted from merging of two mighty black holes. These two black holes hold 8 and 14 solar masses. Scientists predicted that the new black hole hold mass of 21 times the mass of the sun.
Gravitational wave was part of Albert Einstein theory of relativity. According to Einstein, the space itself is flexible and wobbling. Einstein predicted that space and time is stiff but majestic events such as collusion of black holes forces universe to bend. This bending happens because of the pull of gravitational wave.
Researcher David Shoemaker from MIT stated “Just the fact that we’ve now seen more than one [gravitational wave source] is very exciting. It takes us out of the ‘gee whiz, could it be true?’ mindset to yes, this is a tool that we can use.”
David later detailed the detection of the first and second gravitational wave process. According to them the first wave was huge compared to the second one. The second wave came from collusion of two smaller object and thus the signal was much weaker this time. At the same time, because the second wave was much weaker, researcher had enough time to study them properly. The second wave also came much slowly.
Also the second discovery also solved a major dispute among scientists. The research group stated that black hole merging do not radiate gamma rays or X rays. Federico Ferrini from the European Gravitational Observatory (EGO) state “The first event was realizing a dream. Now we have a second, and in the future we’ll have more. It means we’ve really entered the era of gravitational wave astronomy, and we can start to do statistics,” said, the director of European Gravitational Observatory.