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低血糖怎么办-外刊精读(74): 恒星整容,年岁骤减

Star has faceliftto look much younger

恒星整容,年岁骤减

1

A DISTANT star has just undergonean explosive facelift.

一颗远方的恒星刚刚进行了一场爆炸性整容。

2

Martn Guerrero at the Institute of Astrophysicsof Andalusia in Spain and his colleagues observed a planetary nebula: a cloud of dust and gas around an ageing star. Strangely, the cloud’s centre was cooler than the edge that was furthest from the star

西班牙安大道西亚天体物理学院的马丁格雷罗及其搭档在观测行星状星云(一种由尘埃与气体组成,环绕着病笃星的云)时古怪地发现,这片星云的中心处的温度比它间隔恒星最远鸿沟处的温度还要低。

3

The researchers realised they were witnessing the aftermathof a “born-again event”, in which a star gets hot e草原歌曲nough to fuse helium into carbon and expelit in a high-speed wave.

据此,研究员们意识到他们其时目击了恒星“重生”的余波。这种重生是指一颗恒星的温度上升至足以将氯与碳交融的温度时,它会以高速将这种混合气体排出的行为。

This makes the star look cooler and dimmer, and thus younger. They had glimpsedthe nebula just after a hot wave had passed through it, which is why the outer part was hotter.

这种行为会令它看起来愈加暗淡清凉,也正是恒星变“年青”的体现。在研究人员们看到这片星云时恰逢一股热波通过,所以其时它的外围的温度比中心处更高。

中心词:

facelift 整容

undergo 阅历 遭受

astrophysics 空间物理学

nebula星云

aftermath 大灾难 浩劫

expel 驱赶

dim 暗淡的

glimpse 一瞥

拓宽词:

fitness 健美

keep fit 保持身材

undervalue 轻视

underdeveloped 欠发达的

underdog 屌丝 失败者

astronomy 天文学

astrology 星相学

glance 一瞥

peep 窃视

stare 盯

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