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[探索发现] 2015-04-10 BBC:星光七纪元-24

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This tiny companion to the bright dog-star was dubbed the pup. And by the 1926, this new type of the star had an official classification, it was called a white dwarf, but named it with the list of the scientists’ problems, when they compare its size to is mass, something extraordinary emerged, it was denser than anything on earth, denser than anything previously emerged, they were type of star they shouldn’t exist, the burn out remnant is one of his fusion has stopped, their fuel is exhorted, so how can they still shin? Mystery that have been long intrigued professor John Alice.
Throughout their lives, stars make their energy by fusing together, light nuclei to make heavier ones, they start off with hydrogen, and the helium, then they go on to fuse together, helium to make carbon and oxygen, and as time goes on they burn up more, more the fuel and until eventually it’s like a car you run out of the gas.
With its helium burning days is to end, the white dwarf active live is over, all is left with is dead core of carbon and oxygen. It’s not really a star at all, but a cinder, and internal battle raging in the heart of the star between gravity and fusion, now has a clear victor.
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