Everyone knew of Stephen Hawking's cosmic brilliance, but few could comprehend it. Not even top-notch astronomers.
Hawking, who died at his home in Cambridge, England, on Wednesday at age 76, became the public face of science genius. He appeared on "Star Trek: The Next Generation," voiced himself in "The Simpsons" cartoon series and wrote the best seller "A Brief History of Time." He sold 9 million copies of that book, though many readers didn't finish it. It's been called "the least-read best-seller ever."
In some ways, Hawking was the inheritor of Albert Einstein's mantle of the genius-as-celebrity.
"His contribution is to engage the public in a way that maybe hasn't happened since Einstein," said prominent astronomer Wendy Freedman, director of the Carnegie Observatories. "He's become an icon for a mind that is beyond ordinary mortals. ... People don't exactly understand what he's saying, but they know he's brilliant. There's perhaps a human element of his struggle that makes people stop and pay attention."
With Einstein, most people are familiar with e=mc2, but they don't know what it means. With Hawking, his work was too complicated for most people, but they understood that what he was trying to figure out was basic, even primal.
"He was asking and trying to address the very biggest questions we were trying to ask: the birth of the universe, black holes, the direction of time," said University of Chicago cosmologist Michael Turner. "I think that caught people's attention."
And he did so in an impish way, showing humanity despite being confined to a wheelchair with ALS, the degenerative nerve disorder known in the U.S. as Lou Gehrig's disease. He flew in a zero-gravity plane. He made public bets with other scientists about the existence of black holes and radiation that emanates from them — losing both bets and buying a subscription to Penthouse for one scientist and a baseball encyclopedia for the other.
"The first thing that catches you is the debilitating disease and his wheelchair," Turner said. But then his mind and the "joy that he took in science" dominated. And while the public may not have understood what he said, they got his quest for big ideas, Turner said.
Hawking, who was born 300 years to the day after Galileo died, was the Lucasian Professor of Mathematics at Cambridge. It was the same post that Isaac Newton held. Both physicists and astrophysicists claimed him as their own. And much of Hawking's work was in the field of cosmology, a deep-thinking branch of astronomy that tries to explain the totality of the universe.
Hawking's title "is not relevant here; what matters is what his brain did," said Neil deGrasse Tyson, director of New York's Hayden Planetarium. "We claim him as an astrophysicist because his laboratory was the universe."