Check out Some Predictions by Stephen Hawking Proven True

The latest evidence came to light when the Event Horizon Telescope obtained a live image of the supermassive black hole lurking at the center of the giant galaxy Messier 87.

Radiation of Hawking

Black holes get their name because their gravity is strong of photons or particles of light cannot escape from them. 

Applying quantum theory, he realized that some of these photons would appear to radiate from the black hole. This is now known as Stephen Hawking radiation and was recently confirmed in a laboratory experiment at the Technion-Israel Institute of Technology. 

Instead of a real black hole, the researchers used an acoustic analog, a "sonic black hole" from which sound waves cannot escape. They detected the equivalent of Hawking radiation, matching the physicist's predictions.

Ancient Black Holes

Black holes are created by the gravitational collapse of pre-existing material, such as stars. But some may have been created spontaneously in the early universe after the Big Bang.  

Hawking was the first to explore the theory behind ancient black holes in depth. It turns out that they can have any mass, from very light to very heavy. 

One interesting possibility considered by Stephen Hawking is that primordial black holes are mysterious dark matter that astronomers believe permeates the universe. But current observational evidence suggests that this is unlikely to happen. 

Multiverse

One of the topics of Hawking tinkered with towards the end of his life was the multiverse theory, the idea that our universe, which began with the Big Bang, is just one of an infinite number of coexisting bubble universes.  

In his final paper in 2018, Stephen Hawking wrote of "trying to tame the multiverse". He proposed a new mathematical framework that makes it finite. But any speculation about parallel universes is still an enigma and may not be investigated even soon.