Astronomers have been able to peer behind a black hole and detect light coming from the other side for the first time, proving Albert Einstein's theory of relativity correct.
Using highly powered X-ray telescopes, the team of international researchers were examining a supermassive black hole 800 million light years away when they made the astonishing find.
Throughout the study, which was published by a working team of scientists at Stanford University, astrophysicist Dan Wilkins came across a series of bright flares when he sent out X-ray "echoes" - something which is commonly seen with black holes.
However, what astounded him was that additional flares then emerged that were much smaller and consisted of different "colours" compared to the.
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