Space and Gravity with Stephen Hawking

Stephen Hawking died on 14 March 2018 and for his inspirational work in science we The Smart Innovator: Innovation for people dedicated this post to his notable works in Science specific to Space and Gravity. Stephen Hawking was one of the most brilliant theoretical physicists in history. His work on the science and origin of the universe, from the Big Bang to black holes, he helps us all to understand the most complex secrets of the universe.

“Time travel used to be thought of as just science fiction, but Einstein’s general theory of relativity allows for the possibility that we could warp space-time so much that you could go off in a rocket and return before you set out. I was one of the first to write about the conditions under which this would be possible. I showed it would require matter with negative energy density, which may not be available. Other scientists took courage from my paper and wrote further papers on the subject,”.

Stephen hawking talk this about Time travel, he was actively participates in science and space inventions.

He said about Big bang theory too

“The Big Bang theory says that the universe of matter and energy began at a single point, which reached a critical mass, then exploded outward. The universe continues to expand. In a closed universe theory, at some point, the universe is going to ‘hit the wall,’ when enough energy has been expended from the original big bang, then begin to shrink again. In an open universe theory, the universe will just continue to expand indefinitely as the force of gravity becomes weaker and weaker as objects in space spread further apart.”

A black hole is a collapsed star the has zero volume and practically infinite mass. Black holes are so dense that it was believed nothing could escape from them once it passed the “event horizon,” or the proximity to a black hole where its gravity becomes irresistible. Stephen Hawking postulated the existence of radiation that emits through a black hole and comes out the other side. This is now accepted science, and the concept is known as Hawking radiation.

While all over the world guesses about aliens, Stephen hawking once said about that.

“If aliens visit us, the outcome would be much as when Columbus landed in America, which didn’t turn out well for the Native Americans.”