万物简史 第17期:如何营造一个宇宙(9)

The eventual result was the inflation theory, which holds that a fraction of a moment after the dawn of creation, the universe underwent a sudden dramatic expansion. It inflatedin effect ran away with itself, doubling in size every 10-34seconds. The

万物简史 第16期:如何营造一个宇宙(8)

The Big Bang theory isn't about the bang itself but about what happened after the bang. Not long after, mind you. By doing a lot of math and watching carefully what goes on in particle accelerators, scientists believe they can look back to 10-43secon

万物简史 第23期:走进太阳系(1)

2.WELCOME TO THE SOLAR SYSTEM 2.欢迎来到太阳系 Astronomers these days can do the most amazing things. If someone struck a match on the Moon, they could spot the flare. From the tiniest throbs and wobbles of distant stars they can infer the siz

万物简史 第22期:如何营造一个宇宙(14)

For a long time the Big Bang theory had one gaping hole that troubled a lot of peoplenamely that it couldn't begin to explain how we got here. Although 98 percent of all the matter that exists was created with the Big Bang, that matter consisted excl

万物简史 第24期:走进太阳系(2)

This was actually something of a blow to Pluto's status as a planet, which had never been terribly robust anyway. Since previously the space occupied by the moon and the space occupied by Pluto were thought to be one and the same, it meant that Pluto

万物简史 第25期:走进太阳系(3)

One nice touch about Christy's discovery was that it happened in Flagstaff, for it was there in 1930 that Pluto had been found in the first place. That seminal event in astronomy was largely to the credit of the astronomer Percival Lowell. 克里斯蒂

万物简史 第26期:走进太阳系(4)

Tombaugh had no formal training as an astronomer, but he was diligent and he was astute, and after a year's patient searching he somehow spotted Pluto, a faint point of light in a glittery firmament. 汤博没有受过成为天文学家的专门训练，

万物简史 第27期:走进太阳系(5)

As for Pluto itself, nobody is quite sure how big it is, or what it is made of, what kind of atmosphere it has, or even what it really is. A lot of astronomers believe it isn't a planet at all, but merely the largest object so far found in a zone of

万物简史 第28期:走进太阳系(6)

So if Pluto really is a planet, it is certainly an odd one. It is very tiny: just one-quarter of 1 percent as massive as Earth. If you set it down on top of the United States, it would cover not quite half the lower forty-eight states. 因此，如果冥

万物简史 第29期:走进太阳系(7)

And how far is that exactly? It's almost beyond imagining. Space, you see, is just enormousjust enormous. Let's imagine, for purposes of edification and entertainment, that we are about to go on a journey by rocketship. We won't go terribly farjust t

万物简史 第30期:走进太阳系(8)

Now the first thing you are likely to realize is that space is extremely well named and rather dismayingly uneventful. Our solar system may be the liveliest thing for trillions of miles, but all the visible stuff in itthe Sun, the planets and their m

万物简史 第37期:埃文斯牧师的宇宙(1)

3 THE REVEREND EVANS'S UNIVERSE 3.埃文斯牧师的宇宙 When the skies are clear and the Moon is not too bright, the Reverend Robert Evans, a quiet and cheerful man, lugs a bulky telescope onto the back deck of his home in the Blue Mountains of Au

万物简史 第38期:埃文斯牧师的宇宙(2)

Supernovae occur when a giant star, one much bigger than our own Sun, collapses and then spectacularly explodes, releasing in an instant the energy of a hundred billion suns, burning for a time brighter than all the stars in its galaxy. It's like a t

万物简史 第39期:埃文斯牧师的宇宙(3)

Evans's is a talent so exceptional that Oliver Sacks, in An Anthropologist on Mars, devotes a passage to him in a chapter on autistic savantsquickly adding that there is no suggestion that he is autistic. Evans, who has not met Sacks, laughs at the s

万物简史 第40期:埃文斯牧师的宇宙(4)

The term supernova was coined in the 1930s by a memorably odd astrophysicist named Fritz Zwicky. Born in Bulgaria and raised in Switzerland, Zwicky came to the California Institute of Technology in the 1920s and there at once distinguished himself by

万物简史 第41期:埃文斯牧师的宇宙(5)

But Zwicky was also capable of insights of the most startling brilliance. In the early 1930s, he turned his attention to a question that had long troubled astronomers: the appearance in the sky of occasional unexplained points of light, new stars. 然而

万物简史 第42期:埃文斯牧师的宇宙(6)

On January 15, 1934, the journal Physical Review published a very concise abstract of a presentation that had been conducted by Zwicky and Baade the previous month at Stanford University. 1934年1月15日，《物理学评论》杂志刊登了一篇论

万物简史 第43期:埃文斯牧师的宇宙(7)

Interestingly, Zwicky had almost no understanding of why any of this would happen. According to Thorne, he did not understand the laws of physics well enough to be able to substantiate his ideas. Zwicky's talent was for big ideas. OthersBaade mostlyw

万物简史 第44期:埃文斯牧师的宇宙(8)

Surprisingly little of the universe is visible to us when we incline our heads to the sky. Only about 6,000 stars are visible to the naked eye from Earth, and only about 2,000 can be seen from any one spot. With binoculars the number of stars you can

万物简史 第45期:埃文斯牧师的宇宙(9)

So when a hopeful and softspoken minister got in touch to ask if they had any usable field charts for hunting supernovae, the astronomical community thought he was out of his mind. At the time Evans had a ten-inch telescopea very respectable size for