单词dwarf-planet
n.: 矮行星（以轨道绕着太阳的球壮天体，体积不及行星，未能清除在轨迹上的其他天体）
网络: 冥王星划为矮行星；侏儒行星；之矮行星
矮行星（以轨道绕着太阳的球壮天体，体积不及行星，未能清除在轨迹上的其他天体）:
a round object in space that goes around the sun but is not as large as a planet and does not clear other objects from its path
For most of its orbit Sedna is farther from the Sun than any other known dwarf planet candidate.
对于它的轨道塞德娜是远离太阳比任何其他已知的矮行星候选。
A recently-discovered dwarf planet, named Sedna, has an extra-long and usual elliptical orbit around the Sun.
一颗近期被发现的褐矮星“赛德娜”（Sedna）有一个超长的椭圆形的绕太阳的轨道。
The only other known example of such an oddly angled orbit was Pluto, until its demotion to dwarf planet status.
唯一的另一个已知的以如此奇怪的角度运行的例子是冥王星，直到它降级为矮行星。
That"s when astronomers turned up a handful of large trans-Neptunian objects that led to the creation of the "dwarf planet" category.
当时科学家们连续发现了不少海王星外的大型星体，继而产生了“矮行星”这一分类。
After a year in orbit around Vesta, Dawn will travel on to the dwarf planet Ceres.
在环绕灶神星的轨道运行一年后，“黎明”号将飞向矮行星谷神星（Ceres）。
Pluto, now classed as a dwarf planet, is so small and so distant that its surface has been a mystery to astronomers.
现在归类于矮行星的冥王星是那么小，那么远，对天文学家来说，其表面一直是个谜。
The Pluto used to be the ninth planet in the solar system, but now it is listed as the Dwarf Planet.
冥王星曾经是太阳系的第九颗行星，但是现在被列为矮行星。
and Pluto, which is now classed as a "dwarf planet" , also failed to fit in with Bode"s neat pattern when it was found in 1930.
如今被降至“矮行星”的冥王星，在1930年发现之时也无法符合完全波德模式。
If so, they may be able to slip past the velvet rope and into the exclusive dwarf-planet club.
如果是这样的话，那么它们将踏进矮行星俱乐部的门槛。
Pluto and its moonsAstronomers using the Hubble Space Telescope have identified another moon around the dwarf planet Pluto.
天文学家利用哈勃太空望远镜在矮行星冥王星周围发现了其另一颗卫星。