1、高考资源网（） 您身边的高考专家Rosanne SkirbleJanuary 07, 2013British astrophysicist Stephen Hawking has done a lot of thinking about the nature of the universe.The renowned scientist, who has lived most of his 71 years with a paralyzing disease, pioneered efforts to unlock secrets of the cosmos, revolutionizing a
2、strophysics and capturing the imagination of millions in the process.When he turned 70 in 2012, Stephen Hawking was honored with a special exhibit at Londons Science Museum. The tribute gave visitors an inside look at the life and work of one of the worlds greatest minds.“We have some of the first d
3、rafts of Hawkings key scientific papers, astronomy curator Alison Boyle says. And we wanted to do a survey of the key highlights of his career from the early 1960s and 1970s, right through now, and we also have examples of all the popular work hes done over the years.”Universe equationBorn in Oxford
4、, England, in 1942, Hawking studied at both Oxford and Cambridge Universities. He became a math professor at Cambridge and held that post for more than 30 years. In 2009, he left to head the Cambridge University Center for Theoretical Physics.Hawking has spent his life working on big, bold ideas, ac
5、cording to David Devorkin, historian and curator at the Smithsonians National Air and Space Museum in Washington.“His primary passion is to understand physical reality, Devorkin says. What is time? What is space? What is mass, and what do they have to do with one another other? The big push at Cambr
6、idge is to reduce the universe to one equation that encompasses everything.”Bridging the gapHawkings work has focused on bridging the gap between Albert Einsteins theory of relativity -which explains how the pull of gravity controls the motion of large objects like planets- and the theory of quantum
7、 physics, which deals with the behavior of particles on the subatomic scale.Hawking found a wider audience for those ideas with the 1988 publication of his best-selling book, “A Brief History of Time.”“The idea is that the universe is a logical one and one that follows certain rules, Devorkin says.
8、Its out of that that he felt the necessity of a fundamental theory, because if the universe is knowable or logical, we should be able to figure out that logic, and thats what the fundamental theory is.”Seminal workHawking is also celebrated for his seminal work on the strange cosmic phenomena known
9、as black holes.The London exhibit displayed the model Hawking once used to explain his ideas about the unimaginably dense, heavy objects whose powerful gravity swallows up everything that comes close, even light.“It shows the gravitational pull of a black hole, says Science Museum curator Alison Boy
10、le. So when a massive star collapses in on itself, it will keep and keep collapsing until it gets to a point of infinite density. And thats called a singularity, and thats whats right inside a black hole.”Stephen Hawking in his office at University of Cambridge, where he founded the Centre for Theor
11、etical Cosmology. (Science Museum)Hawking applied the idea of singularity to the origin of the universe, which most scientists believe happened about 13 billion years ago in a cataclysmic explosion called the Big Bang.“Much of our understanding of processes in the Big Bang come from Ha
12、wkings work linking black hole physics to Big Bang physics, Devorkin says, and he did a better job at it than anyone else.”Another of the physicists noted contributions is a theory dubbed Hawking Radiation. It proposes that black holes emit radiation and eventually evaporate and vanish. Its an alter
13、native explanation of the structure of the universe that also points to how it might end.Overcoming the oddsSince 1970, Hawking has been almost completely paralyzed by ALS, an incurable, neurodegenerative condition. Confined to a wheelchair, he uses an advanced computer synthesizer to speak.Despite
14、his disabilities, he continues to work, write and travel. At age 65, he was invited aboard a special zero-gravity jet to fulfill his dream of experiencing the weightlessness of a space-faring astronaut. “It was amazing, Hawking said. The Zero-G part was wonderful, and the High-G part was no problem.
15、 I could have gone on and on. Space, here I come!”New eraSpeaking at a 2008 ceremony marking the 50th anniversary of the U.S. space agency, NASA, Hawking called for a new era in human space exploration, comparable, he said, to the European voyages to the New World more than 500 years ago.“Spreading
16、out into space will have an even greater effect, Hawking said. It will completely change the future of the human race and maybe determine whether we have any future at all.”Hawking also posed some fundamental questions.“What will we find when we go into space? he asked. Is there alien life out there, or are we alone in the universe?”Questions inspired by an indomitable mind, and Stephen Hawkings neverending quest to solve the mysteries of the universe. 高考资源网版权所有，侵权必究！
Copyright@ 2020-2024 m.ketangku.com网站版权所有