Hawking was diagnosed with motor neurone disease when he was in his 20s, studying physics at Cambridge. Despite predictions that he would die within a few years, he completed his PhD, and kept going for another five decades. Here's a page of his PhD, which was published online last year.
Hawking also gave lectures and presentations that expanded the minds of millions of people. Here he is at the University of Geneva in 2009, explaining the big bang.
Hawking also met some of the most powerful people on earth. He is pictured below in 1998 with then-President Bill Clinton and First Lady Hillary Clinton.
Hawking met several Popes — he's shown here with Pope Francis in 2016 at a Vatican science conference.
Hawking was also pals with the Queen. He met her a lot of times for various reasons — this photo shows them at a disability charity reception in St James's Palace in 2014.
If it's possible, Hawking became even more famous when he was the subject of a Hollywood biopic, "The Theory of Everything." Here he is at the UK premiere with Eddie Redmayne, who played him, his ex-wife Jane Wilde Hawking, and Felicity Jones, who played her.
Hawking never quite made it to space — but he got extremely close. Here he is in 2007 experiencing zero gravity in a specially-modified plane on the edge of the atmosphere.
Hawking also scaled the heights of pop culture, making four separate appearances in "The Simpsons."
Hawking's first appearance, shown above, was in Season 10, Episode 22. He made three further appearances in later seasons.
Hawking also made cameos in "Family Guy", "The Big Bang Theory", and "Star Trek: The Next Generation."
