These disks are the remnants of planetary formation.

这些圆盘是行星形成的剩余物质.

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

事实上 2009-NQ SUB-17只是颗行星。

So some planetary systems are aligned just so.

所以有些行星系就是这样排列的。

Jay Melosh studies planetary impacts at Purdue University.

在普渡大学研究行星撞击的杰伊·梅洛什说到。

It's going to some other planetary system.

而是去了其它星系。

Mercury brushes against another planetary embryo.

水星与另一颗胚胎期行星擦肩而过。

This explosive planetary drama demands a dynamic human response.

这场爆炸性的地球戏剧需要人类作出积极的反应。

So, what do you eat on the planetary health diet?

那么，所谓对地球健康的饮食方式是以什么为食呢？

And that creates an interesting problem in understanding planetary evolution.

引出了一个关于行星演化的有趣问题。

So planetary nebulae really may owe their existence to planets!

所以行星状星云的存在可能真的要归功于行星！