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

密森尼学会天文台说，这有以来第次从另个行星体中找到它们。

That's a very common shape for planetary nebulae.

这行星状星云很常见的形状。

These disks are the remnants of planetary formation.

这些圆盘行星形成的剩余物质.

That's a long time for humanity but negligible in relation to planetary and galactic  timescales.

这对人类来说段很长的时间，但与行星和银河系的时间尺度相比可以忽略不计。

It's going to some other planetary system.

而去了其它星系。

Lowell was posthumously hailed everywhere as a genius of the first order, and Tombaugh was largely forgotten, except among planetary astronomers, who tend to revere him.

已经不在人世的洛厄尔到处被颂扬流的天才人物，而汤博在很大程度上已被人们忘得干二净，除了在研究行星的天文学家当中，他们往往对他怀有崇敬之情。

The James Webb Space Telescope is already looking at the spectra of planetary atmospheres and who knows what it may one day discover?

詹姆斯·韦伯太空望远镜已经在观察行星大气的光谱，谁知道有天它会发现什么呢？

By the time we're ready to settle even the nearest other planetary systems.

到那时，我们准备好移民到即使最近的星球的时候。

The planetary society says that if all goes according to the plan, the collision will push the moonlet slightly closer to Didymous and shorten its orbit around the asteroid by a few minutes.

行星协会表示，如果计划进行，撞击将使小卫星更加靠近Didymous小行星点，并将小卫星围绕小行星的轨道缩短几分钟。

And so, this was NASA's first ever planetary defense test mission.

这NASA的第次行星防御测试任务。

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

研究行星系统的起源就像做名侦探。

So some planetary systems are aligned just so.

所以有些行星系就这样排列的。

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。

But over the last hundred years, our innovations have gotten us into planetary trouble.

但最近100年来我们的改变引起了些全球化的问题。

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。

What you're looking at is thousands of light years away, it's a planetary nebula, a giant cloud of gas that forms around an ancient star that hasn't yet exploded.

你正在看的数千光年以外的团行星状星云，在尚未爆炸的古老恒星周围形成的巨大气体云。

Mann added that he believes this pattern " is connected to human-caused planetary warming" .

曼恩补充说，他相信这种模式" 与人类造成的地球变暖有关" 。

Charles El Mir is a mechanical engineer who studies planetary science at Johns Hopkins University.

约翰·霍普金斯大学研究行星科学的机械工程师查尔斯·埃尔米尔说到。

The ocean also acts as a giant planetary air conditioner.

海洋还台巨大的空调，调节着地球的温度。

Daniel Baker is an expert in planetary and space physics from the University of Colorado.

丹尼尔·贝克科罗拉多大学行星和空间物理学专家。