Stephen Hawking - Living, Loving, Thinking, Again

Joe Satran and Ryan Grenoble “Iconic Physicist Stephen Hawking Dies At 76” https://www.huffingtonpost.com/entry/stephen-hawking-dead-obituary_us_55e9fa97e4b03784e275e7c1
Robert Barr “Famed Physicist Stephen Hawking Has Died at the Age of 76” http://time.com/5198751/stephen-hawking-physicist-obituary/
CNN Staff “Stephen Hawking, renowned scientist, dies at 76” https://edition.cnn.com/2018/03/14/health/stephen-hawking-dead/index.html
Ian Sample “Stephen Hawking, cosmology's brightest star, dies aged 76” https://www.theguardian.com/science/2018/mar/14/stephen-hawking-professor-dies-aged-76
Roger Penrose “'Mind over matter': Stephen Hawking – obituary by Roger Penrose” https://www.theguardian.com/science/2018/mar/14/stephen-hawking-obituary
安藤健二「ホーキング博士が死去。世界的な物理学者。76歳だった」https://www.huffingtonpost.jp/2018/03/14/hawking-0314_a_23385086/

理論物理学者のスティーヴン・ホーキング博士*1が英国剣橋の自宅で逝去。享年76歳。
CNNの記事から；

With fellow physicist Roger Penrose, Hawking merged Einstein's theory of relativity with quantum theory to suggest that space and time would begin with the Big Bang and end in black holes. Hawking also discovered that black holes are not completely black but emit radiation and will likely eventually evaporate and disappear.

『ガーディアン』（イアン・サンプル記者）の記事から；

Hawking’s first major breakthrough came in 1970, when he and Roger Penrose applied the mathematics of black holes to the universe and showed that a singularity, a region of infinite curvature in spacetime, lay in our distant past: the point from which came the big bang*2.

In 1974 Hawking drew on quantum theory to declare that black holes should emit heat and eventually pop out of existence. For normal-sized black holes, the process is extremely slow, but miniature black holes would release heat at a spectacular rate, eventually exploding with the energy of a million one-megaton hydrogen bombs.
His proposal that black holes radiate heat stirred up one of the most passionate debates in modern cosmology. Hawking argued that if a black hole could evaporate, all the information that fell inside over its lifetime would be lost forever. It contradicted one of the most basic laws of quantum mechanics, and plenty of physicists disagreed. Hawking came round to believing the more common, if no less baffling, explanation that information is stored at a black hole’s event horizon, and encoded back into radiation as the black hole radiates.

さて、彼は21歳だった19631年にALS（筋萎縮性側索硬化症）*3と診断され、２年か３年の余命しかないと医者から宣告されたが、それを裏切って、半世紀以上生き永らえたことになる。

*1:http://hawking.org.uk/ See eg. https://en.wikipedia.org/wiki/Stephen_Hawking Mentioend in http://d.hatena.ne.jp/sumita-m/20120605/1338911826 http://d.hatena.ne.jp/sumita-m/20120709/1341811177 http://d.hatena.ne.jp/sumita-m/20130922/1379847686

*2:S. W. Hawking & R. Penrose”The singularities of gravitational collapse and cosmology” http://rspa.royalsocietypublishing.org/content/314/1519/529 http://rspa.royalsocietypublishing.org/content/royprsa/314/1519/529.full.pdf