Protecting our Earth from space rocks.

保护我们的地球免受太空石块的撞击。

It takes an 800-meter wide space rock to create a hole that large.

需要直径800米的太空岩石撞击才能形成这么大的洞。

For example, a system for nations to share info about incoming space rocks.

比如一套系统以供各个国家间分享关于即将来临太空岩石的信息。

We've already smacked the space rock, we've seen what's happened.

我们已经撞击了那块宇宙岩石，看到了所发生的情况。

The space rocks then headed toward the Earth and moon, Ghent added.

根特补充说，这些太空岩石随后向地球和月球移动。

Can you imagine what would happen if Earth collided with a huge space rock?

你能够想像地球如果撞上太空中的一颗巨大石块会怎么样吗？

There is no chance that this space rock will collide with our planet.

这块来自太空的大岩石根本没有任何几率会同地球相撞。

But that might leave us with hundreds of smaller killer space rocks to dodge.

但这样一来，我们得躲避数以百计从太空掉落下来的致命陨石。

Scientists say there may be a greater threat of space rocks smashing into Earth.

科学家称太空陨石撞击地球的可能性十分巨大。

Finally this week auction house christie's is looking to turn space rocks into cash.

终于在本周，佳士得拍卖行打算把太空岩石变成现金。

Several Hollywood movies have explored the idea of a mega sized space rock hitting earth.

几部好莱坞电影都曾探讨过一个超大尺寸的太空岩石撞击地球的想法。

Scientists have played around with the idea of life hitching rides on space rocks for decades.

几十年来，科学家们一直在研究生命搭乘太空岩石的想法。

What is the term for a space rock that enters Earth's atmosphere and hits the ground?

以下哪一个是进入地球大气层并撞击地面的太空岩石的术语？

Its hoped the technique could one day be used to defend Earth from any approaching space rock.

NASA希望这项技术有一天可以用来保护地球免受任何接近的太空岩石的伤害。

It caused the space rock to speed up its orbit after impact four times more than predicted.

撞击后，这块太空岩石的轨道速度比预期的快了四倍。

Ten-second trivia time: Which of these space rocks is also referred to as a minor planet?

以下哪种太空岩石也被称为小行星?

The United States space agency NASA lists its observation of large space rocks that could crash into Earth.

美国航空航天局NASA列出了对可能撞击地球的大型太空岩石的观测结果。

The mission aims to assess how difficult it would be to stop a sizeable space rock hitting earth.

该任务旨在评估阻止一个相当大的太空岩石撞击地球的难度。

The beads are everywhere, the result of the cooling of melted material sent out by incoming space rocks.

玻璃珠到处都有，这是太空岩石熔化后释放的物质冷却的结果。

Ten-second trivia: What is this space rock that passes through Earth's atmosphere and hits the ground?

穿过地球大气层后撞击地球表面的太空岩石叫什么？