总体来说，以上所述的就是太阳系了——包括围绕主要行星们运转的卫星、数不胜数的小行星(包括冥王星)以及彗星。
For the main part, that's it for the solar system — including a whole host of satellites orbiting the main planets and countless minor planets (including Pluto) and comets.
据行星学家罗宾·卡纳普说，冥王星的所有三个卫星可以追溯回同一次撞击。
According to planetary scientist Robin Canup, all three of Pluto's satellites could trace back to a single impact.
除了在此模拟的照片里所看到了行星和卫星外，我们的太阳系统还包含一个恒星、一些小行星和彗星，和像冥王星那样的侏儒行星。
In addition to the planets and moons seen in this simulated photo, our solar system contains a star, asteroids and comets, and dwarf planets such as Pluto.
更奇怪的是，在1978年科学家宣传他们发现了一颗冥王星的卫星，它的体积居然达到冥王星体积的一半，这颗卫星也就成为了已知卫星中与其母星体积相比最大的一颗。
Adding to the oddities, in 1978 scientists announced they'd found a moon of Pluto—but one that's almost half its size, making it the largest moon in relation to its parent body.
这里可以看见它的已知3个卫星：冥卫1，冥卫2，和冥卫3。 包括冥王星在内的一群物体，在海王星的凯伯带（数十亿颗在海王星轨道之外绕行的小型冰体构成的碟形带）之上，围绕着太阳的作盘形轨道运行。
Seen here with its three known moons, Charon, Nix, and Hydra, Pluto is a member of a group of objects that orbit in a disklike zone beyond the orbit of Neptune called the Kuiper belt.
其他小组的研究课题包括表面地质、内部结构以及冥王星五卫星体系的形成等等。
Other mission members are focused on surface geology, interior structure, and formation of the Pluto-Charon system of five moons, among other things.
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。
Indeed so could Ceres, a dwarf planet in the asteroid belt, and Pluto, a dwarf planet even farther off than Neptune.
此时海王星、冥王星都是规则的，且适用于大多数卫星。
In this case Neptune and Pluto are regular, and so are mostly satellites.
现在大家知道，冥王星及其卫星们只是被称作柯伊伯带的天体群中较大的例子，和太阳系其他行星不同，不是其所在区域的唯一行星。
Instead of being the only planet in its region, like the rest of the Solar System, Pluto and its moons are now known to be just a large example of a collection of objects called the Kuiper Belt.
等到2015，一旦美国宇航局的新视野号宇宙飞船抵达目的地，这一推测将得到印证。新视野号是第一个专为环绕冥王星及其卫星飞行的探测器。
This is a prediction that can be tested once the NASA's New Horizons spacecraft arrives in 2015, the first probe specifically designed to fly by Pluto and its moons.
哈勃太空望远镜最近发现了第四颗绕行冥王星的卫星。天文学家们暂时把它命名为P4。该是迄今为止发现的围绕这颗冰雪覆盖的矮行星的最小的卫星。
Hubble recently showed a fourth moon orbiting Pluto. Astronomers temporarily named it P4. The moon is the smallest to be discovered around the icy dwarf planet.
冥王星唯一的卫星卡戎，大小是冥王星的一半。
哈勃望远镜最近发现了冥王星第4颗卫星，天文学家暂时称之为冥卫四(P 4)，它是环绕冥王星的最小的卫星。
Hubble recently showed a fourth moon orbiting Pluto. Astronomers temporarily named it P4. The moon is the smallest to be discovered around the icy dwarf planet.
1978年的今天，冥王星的冥卫一卫星被发现。
1978 - Charon, a satellite of the planet Pluto, is discovered.
直到去年，科学家还认为冥王星只有一颗卫星卡戎。
Until last year, scientists thought Pluto was accompanied by only one moon, Charon.
直到去年，科学家还认为冥王星只有一颗卫星卡戎。
Until last year, scientists thought Pluto was accompanied by only one moon, Charon.
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