Actually, 2008-nq sub-17 is a planetary body.

事实上 2009-NQ SUB-17只是颗行星。

In short, this makes planetary bodies more susceptible to collision and impact.

简而言之，这使得行星更容易受到碰撞和冲击。

The Smithsonian Institution says they were the first ever retrieved from another planetary body.

史密森尼学会天文台说，这是有史以来第一次从另一个行星体中找到它们。

Actually, 2008NQ Sub17 is a planetary body. I'm not talking about you, I'm talking about me.

2008NQ sub 17号，实际上是一颗行星。我又没说你，我在说我呢。

In space, a planetary body that comes close enough to a star falls victim to its strong gravitational pull.

在太空中，离恒星足够近的行星会受到强大的引力的影响，成为其牺牲品。

The astronomers wanted to see if any others planetary bodies formed near the Earth and could have crashed into it.

天文学家们希望看到会有其它行星物体在地球附近形成，并能够撞击她。

Zhang told the Reuters news agency that most planetary bodies are made of groups of rocks joined under the influence of gravity.

张告诉路透社，大多数行星体是由在引力作用下结合在一起的岩石群组成的。

Clouds, essentially,   are liquid droplets or solid particles suspended in the atmosphere of a planetary body.

本质上，云是悬浮在行星体大气中的液滴或固体颗粒。

This wouldn't be engineering an Earth organism and preadapting them, and preconditioning them in a way that they exist and survive in this other planetary body.

不是改造地球已有的生命，对其进行预处理，使其适应其他星球的生活方式。

" If humans want to move to different planetary bodies someday, we will have to understand what's going on at the surface to be able to prepare."

“如果有一天人类想要搬到不同的行星体上，我们就必须了解这些行星表面发生了什么，才能够做好准备。”

And I myself am floating with wild caprice in the midst of this nebulous mass of fourteen hundred thousand times the volume of the earth into which it will one day be condensed, and carried forward amongst the planetary bodies.

而我自己则随心所欲地漂浮在这片体积为地球一百四十万倍的星云之中， 有一天它会被凝结成这样，并在行星体中前进。