英语听力：2013-11-08 地平线：黑洞吞噬—22

Was there any connection between the two? What Magorian discovered was completed unexpected. The relationship that we find was essentially that the bigger the galaxy, the bigger the black hole. That's in its broad terms. If you want to be a bit more

英语听力：2013-11-06 地平线：黑洞吞噬—21

Far from being violentaions and destruction, it seems instead , black holes might actually be benign architects ,whichve played a part in the creation of the galaxies,stars,and even the life itself. One of the first scientists to begin to see black h

英语听力：2013-11-03 地平线：黑洞吞噬—20

The super bright quasar phase having ended many billions of years ago, when the fuel that fires violent emissions was completely consumed. But now, with the approaching gas cloud and a prospect of feeding, the black hole should get brighter. Exactly

英语听力：2013-11-01 地平线：黑洞吞噬—19

We now know this light is produced by the rotating disk of matter, spinning round the edge of the black hole at the heart of the Cygnus A galaxy, waiting to be devoured. It means that against all popular expectations, the brightest sources of light i

英语听力：2013-10-30 地平线：黑洞吞噬—18

Here then is the strange paradox of black holes: the defeating black hole is anything but black. Just how greedy and bright a black hole can get is revealed by an aptly very ordinary looking galaxy called Cygnus A, some 650 million light years away.

英语听力：2013-10-27 地平线：黑洞吞噬—17

The difference is that when you have a lot of gas, a lot of stuff orbiting around the black hole, there is a little bit of friction that causes matter to slowly spiral in towards the black hole. As gas continues to spiral in towards the Event Horizon

英语听力：2013-10-25 地平线：黑洞吞噬—16

To stare into the void of a black hole, to tumble through space before disappearing forever within it, it's the prospect of catching that unique moment that explains the excitement of this year's events. What happens to matter once it's been swallowe

英语听力：2013-10-23 地平线：黑洞吞噬—15

It's clear that it will come very close to the black hole, might even hit the black hole. So maybe we actually are feeding the black hole here. Now exactly how much and how fast of all these is completely unknown and that's the excitement about it be

英语听力：2013-11-13 地平线：黑洞吞噬—24

The X-ray image revealed how the black hole at the heart of the galaxy was firing unimaginable amounts of radiation into surrounding space and with extraordinary consequences. We could see what was going on at the centre and we could start to underst

2015-05-08 BBC:星光七纪元-32

An implosion that launches an explosion creating enough heat and energy to forge almost all the other elements.The supernova explosion is able to produce some of the very rare elements heavier than iron, the zinc, the gold, the platinum, the silver,

2015-06-03 BBC:星光七纪元-39

It remains to some extent a theory, but Doug has got as close as anyone to actually seeing it happen.It's started by getting alert on the computer that a supernova had gone off in a very nearby galaxy, only 210 million light years away, here is a pic

2015-05-29 BBC:星光七纪元-38

There were apparently nonsensical structures of space and time, spat out when Albert Einstein's equations weretaken to their extreme conclusion. Einstein's theory of relativitydoes lead us into very strange and unfamiliar paths. Einstein himself didn

2015-05-27 BBC:星光七纪元-37

And became billions of times stronger than our sun's, now as the star span, it channelled out radio signals from its north and south poles, signals that swept past earth with every rotation of the star, this was the source of the mysterious pulses, s

2015-05-22 BBC:星光七纪元-36

The calculations focus on a strange quality of all matter. It's one that defies common sense. But it's fundamental to the work of Astrophysicists like professor Douglas Leonard. Solidity is an illusion. If I run up with my fist and punch a burg wall,

2015-05-20 BBC:星光七纪元-35

Could these be the neutron stars predicted by Z? astronomers nicknamed them pulsars and immediately set their telescopes searching for further clues about them, just a year later, they found one, in the perfect place to put Z's theory to the test.In

2015-05-13 BBC:星光七纪元-33

Bloating in old age to become red giants;their cores contracting into white dwarves; The most massive ones exploding as supernovae; Fleeing the elements they have created, out into space to form the materials for the next generation of stars. But tha

2015-05-06 BBC:星光七纪元-31

And with his colleagues, he did the calculations to prove it. The key was the conditions created in the final stages about massive stars fighting against its gravity. These stars are so massive and hot that they can go through a whole series of nucle

2015-05-01 BBC:星光七纪元-30

And so i can see that there is hydrogen being produced by the supernova, and over here the yellow orange light is due to glowing atoms of sodium, it's the same sodium glow that we saw when I sprinkled the chemical into the fire, these ones here in th

2015-04-29 BBC:星光七纪元-29

The supernovae that Alex photographs are hundreds of millions of light years away. The only reason that he can photograph them so distinctly is because there are such colossal explosions. And appreciating the power of a supernova's explosion has been

2015-04-24 BBC:星光七纪元-28

And takes dedication perseverance and a love of the thrill of the chase, not just any kind of astronomer but a supernovae hunter, and one with perfect timing.You know usually nothing much happens in astronomy, stars live for millions or billions of y