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Hawking’s Black Hole Theorem Gets Physicists’ Nod

The Black Hole theory is centered on a law that says that the area of all the bodies- no matter what size- event horizons must never shrink.

It is known as Hawking’s area theorem, which physicist Stephen Hawking put forward in 1971.

Fifty years post, physicists at MIT and around the world confirmed the theorem for the first time using gravitational waves observations.

In the research, the scientists take a microscopic view of GW150914, LIGO’s first detected gravitational wave signal back in 2015.

It results from two inspiraling black holes that produced another Black Hole and vast energy that rippled as gravitational waves through space-time.

If Hawking’s area theorem is true, then the newly formed Black Hole area shouldn’t be less than that of the parent black holes.

In the latest study, physicists studied the signal from GW150914 pre and post cosmic collision again and concluded that indeed, after the merger, the total event horizon area did not reduce.

Their research spots the first straight observational confirmation of Hawking’s theorem, which had mathematical proofs but had no observational evidence.

The research team plans to analyze other gravitational wave signals to observe if they may further prove Hawking’s theorem or end up being a new discovery in the Physics world.

Maximiliano Isi, the team lead, said that the idea of a zoo of various compact objects is quite impossible. In contrast, some of these objects obey Hawking and Einstein’s laws, and others might behave as different species.

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