There are nine planets in the solar system.

在太阳系中有九大行星。

So what does Tyson maintain is so wrong with Pluto?

泰森什么要把冥王星从九大行星中移除？

What say we finish ourselves an eight-planet solar system?

我们一起把那8大行星太阳系模型做完吧？

So what's the difference between a small brown dwarf and a really big planet?

那么一颗小褐矮星和一颗大行星有什么区别？

I'm the 2nd largest planet in our solar system.

我是太阳系中第二大行星。

Well, a crater ridge on Vesta, a large asteroid, is around 19 kilometers high.

嗯，大行星灶神星上的陨石坑脊大约有 19 公里高。

All of the giant planets have rings, probably leftover from when the planets formed, and the moons coagulated out of the gas that was there and then it could be a failed moon.

所有的大行星都有，或许是来自行星形成时的残余物，卫星在气体外凝结，而这可能是没有成功的卫星。

It's probably older than any rock you can find anywhere on Earth because it formed from the primordial gas cloud, that nebula that collapsed to form the sun and the planets over four and a half billion years ago.

也许比地球上所有的岩石还要久远，这是因生于最原始的星云团，这个星云团在 45 亿年前形成了太阳和各大行星。

It was a beautiful thing; each of the moons glimmered in place around the nine planets and the fiery sun, all of them hanging in thin air beneath the glass.

这个模型非常美丽，燃烧的太阳、九大行星及们的卫星悬浮在玻璃罩中，在各自的位置上熠熠闪烁。

Originally considered a planet following its discovery in 1930, Pluto was regarded as the ninth planet in the solar system for more than 75 years.

1930年首次发现并被认是行星后，作太阳系第九大行星已超过75年。

NASA provided the image of the rare transit of Mercury, the smallest plant appearing as a tiny black dot on the face of the sun.

航空航天局发布水星罕见“穿越”照片，作八大行星中最小的一颗，水星形似太阳脸上的黑点。

Holding the idea of a circling system of suns and worlds, it takes the form of these bodies, and moves them as it thinks.

在九大行星围绕太阳运转的想法的基础上，母体又逐渐衍生出各大行星的实体，并且让们按照所规划的体系运动着。

Additionally, the eight known major planets of the solar system currently orbit the sun tilted by six degrees compared to the sun's equator.

此外，太阳系中已知的 8 颗大行星目前围绕太阳运行，与太阳的赤道相比，们的倾角 6 度。

While standing on his balcony, Wang observes various planets thousands of light-years away with an astronomical telescope and takes pictures of them.

王至璞站在阳台上，用天文望远镜观察着数千光年之外的各大行星，并拍下们的照片。

Juno's goal is to investigate what the giant planet is made from and how it's put together.

“朱诺”的目的是调查这颗大行星的构成成分和形式。

Venus is the sixth largest planet in the Solar System.

体型上，金星是太阳系中第6大行星。

Callisto orbits Jupiter farthest out of the four biggies, almost two million km away.

在四个大行星中，木卫四的公转轨道离木星最远，约达200万千米。

It's the glue that holds the planets in orbit around the sun.

让九大行星围绕着太阳旋转。

When Eris was discovered in 2005, it was briefly hailed as a tenth planet, but it sparked a debate in the astronomical community about what makes a planet a planet.

2005年，阋神星被发现时，被称第十大行星，但引起了天文学界的讨论，讨论针对行星的定义。

Planets don't like each other, because they're gravitationally tugging each other.

几大行星各自不喜欢对方，几大行星各不相同取决于各自的引力。