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！

So planetary astronomer, Heidi Hammel, submits a proposal to NASA.

行星天文学家海蒂∙海莫向NASA递交了一项建议。

The timing issue has everything to do with planetary mechanics.

这一时间安排与行星力学有很大关系。

Or is the planetary model of the atom doubly wrong?

或是行星原子模型又错了?

A triumph for humanity in the name of planetary defense!

以行星防御的形式实现了人类的胜利！

The planetary safety boundary of 1.5 degrees has not been reached.

地球还没有达到1.5度的安全界限。

The rockets will be used to study physics and planetary science.

这些火箭将用于研究物理学和行星科学。

And we see all the stars surrounded by completed planetary systems.

我们也知道所有恒星都由完全形成的行星系统环绕。

Working on the origin of planetary systems is like being a detective.

研究行星系统的起源就像做一名侦探。

Bruce Banerdt, a planetary geophysicist at the Jet Propulsion Lab in California.

加州喷气推进实验室的行星地球物理学家布鲁斯·巴纳特说到。

Now two new studies posted at arxiv.org have strengthened the planetary argument.

目前，另两项发表在 arXiv.org 上的新研究强化了行星论论点。