The rocket s blue glare
火箭的蓝色眩光
After spending a year in orbit around Vesta, Dawn will perform a trick rare in spacetravelit will reignite its engines and head off to orbit another body.
在绕行灶神星轨道一年后,黎明号将施展航天探索中少有的绝技它将重新点燃发动机向另一个天体的轨道进发。
Ceres, at about 960km in diameter, is the largest asteroid. Dawn is due to arrive there in2015.
谷神星直径大约为960公里,是小行星带里体积最大的成员。黎明号将于2015年到达谷神星。
Ceres, too, is spherical and probably divided into core and mantle, though the mantle seemsto be wetter than that of Vesta.
谷神星也是球状天体,它可能也被划分成地核和地幔,但它的地幔似乎比灶神星的地幔更富含水质。
Indeed, Ceres may have ice caps and a thin atmosphere.
实际上,谷神星可能有冰层覆盖而且大气稀薄。
But it has been luckier than Vestaand almost every other asteroidin avoiding collisions,and has thus not yielded a huge crop of meteorites for Earth-bound scientists to examine.
但在避免碰撞方面,它比灶神星要幸运得多几乎比其它任何小行星也都幸运,因此它没有产生可供地球科学家研究的大量陨石。
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