Saturn is the second biggest planet in the solar system.
土星是太阳系的第二大的行星。
The picture shows six of the nine planets in the solar system.
这张图片展示太阳系9个行星中的6个行星。
Mars is the lightest planet in the solar system, which makes Mars the second smallest planet in the solar system.
火星是太阳系中最轻的行星，这使得火星成为太阳系中第二小的行星。
Scientists have launched many spaceships to explore other planets in the solar system.
科学家们已经发射了很多宇宙飞船去探索太阳系的其他行星。
Mars is one of the four planets in the solar system that is a rocky planet.
火星是太阳系中四颗岩态行星之一。
The Moon's spin and tilt are unique among other planetary bodies in the solar system.
月球的自转和倾斜在太阳系的其他行星体中是独一无二的。
For more than 300 years, we thought Saturn was the only body in the solar system with rings.
在300多年的时间里，我们一直认为土星是太阳系唯一拥有光环的天体。
The surface of Mars shows a wide range of geologic features, including huge volcanoes—the largest known in the solar system—and extensive impact cratering.
火星表面显示出广泛的地质特征，包括巨大的火山——太阳系中已知的最大的火山——和广阔的撞击坑。
Complex life evolved on the Earth's surface, but not on Mars or other planets in the solar system because on those planets, early surface life was killed by UV radiation.
复杂的生命在地球表面进化，而不是在火星或太阳系的其他行星上，因为在那些行星上，早期的地表生命被紫外线杀死了。
What is the coldest place in the solar system?
太阳系里最冷的地方在那里？
It's the largest known vortex in the solar system.
它是太阳系中已知的旋涡中最大的一个。
Earth has successfully colonized every planet in the solar system.
而且，太阳系其他星球都成了地球人的殖民地。
The lowest temperature ever measured in the solar system was on the Moon.
太阳系里所测量到的温度最低的地方是在月球上。
Many impact craters seen in the solar system were caused by such collisions.
太阳系中的许多冲撞坑都是由这种碰撞造成的。
Such a definition would greatly expand the list of planets in the solar system.
这一定义将会大大地加长太阳系行星的名单。
In 1846, another discovery was confirmed, the eighth planet in the solar system.
在1846年，人们确定了另一个发现，即太阳系中的第八颗行星。
Mars is the fourth rock from the sun and our outer neighbour in the solar system.
火星是太阳外第四个星球，我们在太阳系中的好邻居。
It is one planet, one place, and there is nothing else like it anywhere in the solar system.
这是一个星球、一个居民区，是太阳系中一个独特的地方。
You guessed it; the best helium-3 supply in the solar system is from the "Gas Mines" of Uranus.
你猜对了，在太阳系以内最好的氦-3供应来自天王星的“天然气田”。
Results like this make Enceladus one of the most exciting places we've found in the solar system.
正是这样的结果，让我们相信土卫二是太阳系中我们找到的最令人感到激动的地点。
Training doesn't get any simpler than this, not on this planet or anywhere else in the solar system.
没有比这个更简单的训练了，不管是在地球上还是在太阳系的任何地方。
Jupiter, the largest planet in the solar system, is visible in the eastern sky before dawn, NASA said.
木星是太阳系中最大的行星，在地球的东方地区里，可以在黎明前的天空里看得它，美国宇航局表示说。
This montage of photos, taken by various NASA spacecraft, shows the order of planets in the solar system.
这张蒙太奇照片，由各种美国宇航局飞船所获得的多种照片构成，它显示了太阳系行星的次秩。
Titan, on the left, is among the largest moons in the Solar System and is perpetually shrouded in clouds.
土卫六（泰坦），左边那颗，是太阳最大的卫星之一，永远被云层覆盖。
Ganymede, the largest moon in the solar system, has a dirty ice surface cut by fractures and peppered by impact craters.
这颗太阳系中最大的卫星，表面冰盖布满断层的切口和火山灰的粉末。
What they learn from all this may help us find life elsewhere in the solar system, according to a statement from NASA.
据来自NASA的一份声明说，由此获知的信息或许能帮助我们找到太阳系中其他地方的生命。
With perfect observing conditions, the Moon will be the principal astronomical observation platform in the solar system.
由于具备最理想的天文观察条件，月球将建设成太阳系最重要的天文观察平台。
With perfect observing conditions, the Moon will be the principal astronomical observation platform in the solar system.
由于具备最理想的天文观察条件，月球将建设成太阳系最重要的天文观察平台。
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