Extra-terrestrial means from outside, Earth, and is another word often used to describe aliens.

“地球外”是指自地球外，是另一个经常用描述外星人词。

And what could they tell us about the universe and life beyond our planet?

这些图又能告诉人类宇宙和地球外生命什么信息？

In fact, it was the first ocean ever discovered on another celestial body.

事实上，这是在除地球外天体上发现第一个海洋。

It was the first ocean discovered on another planet.

这是在除地球外天体上发现第一个海洋。

I'm acting as link between Earth and those on an extra-terrestrial planet.

我是地球和外星球联系人。

It's also why off-planet volcanoes tend to look more like pancakes than Mt. Fuji.

这也是什么地球外火山比富士山看起煎饼原因。

All my life, I've wondered about life beyond the Earth.

一生中，我都在好奇地球外生命。

The future, then, looks bounded by that new outer limit of planet Earth, the geostationary orbit.

那么，未看要被限制在地球新外边界内，即同步轨道。

The reservations " weight lesseted" , and the view of the best " off earth" .

“重量减少”预定，和“地球外”最好风景。

The passengers also will have to deal with the physical demands of traveling outside Earth's orbit.

乘客们还必须应对在地球轨道外旅行身体需求。

And finally, extra-terrestrial means from outside Earth, and is another word often used to describe aliens.

最后，“地球外”是指自地球以外，是另一个经常用描述外星人词。

Now, while astronomers are scientists who study questions concerning things outside of Earth, they often avoid investigating supposed aliens.

现在，虽然天文学家是研究与地球外事物有关问题科学家，但他们经常避免调查所谓外星人。

Titan is the only planet in our solar system besides Earth to have known bodies of liquid on its surface.

土卫六是太阳系中除地球外唯一已知表面有液体星球。

Now, if you remember, space is the area that is outside the Earth.

现在，如果你还记得，太空是地球外区域。

They've let us gather more knowledge of what goes on outside our planet than ever before.

他们让我们收集到比以往任何时候都多关于地球外发生事情知识。

Scientists are searching for extraterrestrial life.

科学家们正在寻找地球外生命。

U.S. government officials are set to approve a mission by privately-held space company Moon Express to travel outside of Earth's orbit in late 2017.

美国政府官员在2017年底批准了一项私营航天公司Moon Express将在地球轨道外遨游任务。

They were on this planet for more than 100 million years, and these guys were very successful and they only went out because of extraterrestrial causes.

它们在这个星球生存了一亿多年，它们是非常成功，它们灭绝也只是由于地球外因素。

Because of this, when NASA is looking for evidence of life outside our planet, we first start by looking for evidence of water.

因此， 当美国宇航局寻找地球外生命存在证据时，我们首先从寻找水迹象开始。

And what the NASA scientist showed was that with a simple analysis you can show that that was moving at 40 miles an hour, so certainly nothing very extra-terrestrial about that.

NASA科学家所展示是，通过一个简单分析，你可以证明那个东西是以每小时40英里速度移动。因此，它肯定不是地球外事物。