Russian billionaire Yuri Milner, with the help of Stephen Hawking and Mark Zuckerburg, plans to launch a fleet of nano-probes1 toward a star close to our solar system, Alpha Centuri. The craft, outfitted with lightsails, will be pushed along to their destination in just 20 years by powerful lasers on Earth.
In the last decade and a half, rapid technological advances have opened up the possibility of light-powered space travel at a significant fraction of light speed. This involves a ground-based light beamer pushing ultra-light nanocrafts - miniature space probes attached to lightsails - to speeds of up to 100 million miles an hour. Such a system would allow a flyby mission to reach Alpha Centauri in just over 20 years from launch, and beam home images of possible planets, as well as other scientific data such as analysis of magnetic fields.
Breakthrough Starshot aims to demonstrate proof of concept for ultra-fast light-driven nanocrafts, and lay the foundations for a first launch to Alpha Centauri within the next generation. Along the way, the project could generate important supplementary benefits to astronomy, including solar system exploration and detection of Earth-crossing asteroids.
So, this is a time travel movie with Keanu Reeves (narrator) and Alex Winter (director), but it's not Bill & Ted's Excellent Adventure, Part 3? No, of course not. It's actually a video about quantum chess featuring Paul Rudd, Stephen Hawking, and music from The Matrix. Like, WHAT?! If The Chickening hadn't dropped earlier, this would be the oddest thing you'll watch this week. (And it's not quite clear, but the video appears to be an advertisement for a quantum chess game that's launching on Kickstarter next week. Nothing about this makes any sense...) (via @gavinpurcell)
An Oscar presented to the actor who played him was just the latest honor presented to a man who has no shortage of amazing achievements. But Stephen Hawking's most amazing -- and mysterious -- achievement could be the fact that he's alive. From WaPo: How Stephen Hawking, diagnosed with ALS decades ago, is still alive.
In this compelling memoir, his first wife, Jane Hawking, relates the inside story of their extraordinary marriage. As Stephen's academic renown soared, his body was collapsing under the assaults of motor neurone disease. Jane's candid account of trying to balance his 24-hour care with the needs of their growing family reveals the inner-strength of the author, while the self-evident character and achievements of her husband make for an incredible tale presented with unflinching honesty.
Most physicists foolhardy enough to write a paper claiming that "there are no black holes" -- at least not in the sense we usually imagine -- would probably be dismissed as cranks. But when the call to redefine these cosmic crunchers comes from Stephen Hawking, it's worth taking notice. In a paper posted online, the physicist, based at the University of Cambridge, UK, and one of the creators of modern black-hole theory, does away with the notion of an event horizon, the invisible boundary thought to shroud every black hole, beyond which nothing, not even light, can escape.
In its stead, Hawking's radical proposal is a much more benign "apparent horizon", which only temporarily holds matter and energy prisoner before eventually releasing them, albeit in a more garbled form.
Steven Hawking came up with a simple and clever way of seeing if time travel is possible. On June 28, 2009, he threw a party for time travellers from the future...but didn't advertise it until after the party was already over.
In an effort to improve the chances of the party invite being noticed by future generations, Peter Dean, working with approval from Hawking, has made this gorgeous hand-printed poster of the party invitation:
I have been fortunate in the director of the film, Errol Morris. He is a man of integrity, with a feeling for the issues. It would have been all too easy to have someone who would have concentrated on the more sensational aspects of my private life, and my medical condition, and who would have treated the science in a superficial way. A friend of mine, who has had several television programmes based on his work, was envious of how the scientific ideas came through on the film.
Claudia Dreifus of the NY Times scores a rare interview with Stephen Hawking. The ten questions were sent to him in advance and then he met with Dreifus in person to play his answers for her.
Q. Given all you've experienced, what words would you offer someone who has been diagnosed with a serious illness, perhaps A.L.S.?
A. My advice to other disabled people would be, concentrate on things your disability doesn't prevent you doing well, and don't regret the things it interferes with. Don't be disabled in spirit, as well as physically.
Audio clips of some of his answers are available in the article's sidebar. Interestingly, despite the advances in text-to-speech audio and upgrades to his writing hardware & software, Hawking's voice remains the same.
In The Grand Design we explain why, according to quantum theory, the cosmos does not have just a single existence, or history, but rather that every possible history of the universe exists simultaneously. We question the conventional concept of reality, posing instead a "model-dependent" theory of reality. We discuss how the laws of our particular universe are extraordinarily finely tuned so as to allow for our existence, and show why quantum theory predicts the multiverse--the idea that ours is just one of many universes that appeared spontaneously out of nothing, each with different laws of nature. And we assess M-Theory, an explanation of the laws governing the multiverse, and the only viable candidate for a complete "theory of everything."
If we want to travel into the future, we just need to go fast. Really fast. And I think the only way we're ever likely to do that is by going into space. The fastest manned vehicle in history was Apollo 10. It reached 25,000mph. But to travel in time we'll have to go more than 2,000 times faster. And to do that we'd need a much bigger ship, a truly enormous machine. The ship would have to be big enough to carry a huge amount of fuel, enough to accelerate it to nearly the speed of light. Getting to just beneath the cosmic speed limit would require six whole years at full power.
Description of attending an amazing talk by Stephen Hawking. "In the beginning there's a long pause. Really long. The applause dies down and then... crickets. For thirty seconds... a minute... two minutes. Then suddenly, Hawking's synthesized voice: 'Can you hear me?' The climactic scenes of blockbuster movies are not as thrilling."