Launched in 2007, Dawn is the first mission to explore Vesta and Ceres, the two largest members of the asteroid belt.
“黎明号”于2007年发射升空，是首个探测小行星带两颗最大天体灶神星和谷神星的飞行器。
The mission to Vesta and Ceres is managed by NASA's Jet Propulsion Laboratory in Pasadena, Calif., for the agency's Science Mission Directorate in Washington.
这个飞往维斯塔和塞丝丽的航天任务由加州帕萨迪纳美国国家航空航天局喷气推进实验室主导，航天局科学计划董事会位于华盛顿。
After a year of studying Vesta, Dawn is scheduled to leave orbit and, in 2015, approach the only asteroid-belt object that is larger: Ceres.
一年后，黎明号探测器将离开灶神星的轨道，计划在2015年到达谷神星，它是小行星带中唯一一颗比灶神星大的小行星。
Ceres, too, is spherical and probably divided into core and mantle, though the mantle seems to be wetter than that of Vesta.
之前翻译成潮湿，意思很表面，在这里由于谷神星则是典型的冰态天体，它比“灶神星”应该更“富含水质” ，这样理解更准确。
Ceres, too, is spherical and probably divided into core and mantle, though the mantle seems to be wetter than that of Vesta.
之前翻译成潮湿，意思很表面，在这里由于谷神星则是典型的冰态天体，它比“灶神星”应该更“富含水质” ，这样理解更准确。
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