The largest asteroid is Ceres, which is about a quarter the size of the moon.
最大的小行星是谷神星，其体积大约是月球的四分之一。
Between the orbits of Mars and Jupiter lies the asteroid belt, which includes the dwarf planet Ceres.
在火星和木星的轨道间分布着小行星带，之中有一颗矮行星谷神星。
So Pluto should be a planet, as should Eris and the dwarf planet Ceres (the largest body in the asteroid belt between Mars and Jupiter), as well as many other objects.
这样看来，冥王星应该属于行星，就像厄里斯和矮行星谷神星(火星和木星之间的小行星带里最大的天体)，以及许多其他的物体也应如此。
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。
Ceres, at about 960km in diameter, is the largest asteroid. Dawn is due to arrive there in 2015.
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。
Indeed so could Ceres, a dwarf planet in the asteroid belt, and Pluto, a dwarf planet even farther off than Neptune.
谷神星，小卫星带上的一颗矮卫星，以及比海王星更加远的矮卫星——冥王星，也可能拥有海洋。
Pluto was still a planet, and so were Eris and even Ceres, which had been thought of as the largest asteroid.
冥王星仍是行星，厄里斯也是，行星名单甚至包括被认为是最大的小行星的谷神星。
THE picture shows Ceres, the largest objectin the asteroid belt, as seen a few days ago from Dawn, an American spacecraftthat is en route there.
图片显示的是位于小行星带的最大天体——谷神星，由正在飞往它的美国航天器“黎明号”在几天前看到的。
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。
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。
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