Comet impacts can distribute water all over the Moon, but most of it is destroyed by sunlight.

彗星的撞击可能会把水分布到整个月球上，但其中大部分都因为阳光照射而消失了。

It's possible that the ingredients of life on Earth didn't start here, but instead were brought to our planet from comet impacts.

有可能地球上的生命成分不是从地球本身形成的，而是来自彗星的撞击。

Hubble's pictures of the comet impact prove that the kind of violence that formed our planet billions of years ago, continues through this day.

哈勃拍摄的关于彗星碰撞的图片证明了正是这种猛烈的能量在数十亿年前形成了我们的地球并且持续至今日。

The air doesn't provide much of a shield from asteroid and comet impacts, so the surface is heavily cratered — and it still gets hit today.

火星对于小行星和彗星的撞击并不能提供足够的保护，所以火星表面布满了坑坑洼洼的陨石坑——时至今日它也仍然会受到撞击。

If they were coming from, say, comet impacts on neutron stars (which was one possible hypothesis) then we should see more bursts along the plane of the Milky Way than above it.

如果它们产生于，比如说，彗星撞击中子星(这是一种可能的假设)，那么我们应该在银河系平面上看到更多的伽玛射线爆，而不是在其上方。

It's the best few scientists have gotten of Mercury's impact craters, which are formed by large asteroid or comet impacts, revealing more about the history of their formation and of the planet's volcanic history.

这是科学家们获得的关于水星撞击坑最好的几张照片，它们是由大型小行星或彗星撞击形成的，揭示了更多关于它们的形成历史和行星的火山历史。

Because should the world face a cataclysmic event, such as a comet impact or nuclear war, the vault contains enough seeds to bring almost every kind of plant species imaginable back to life.

因为如果世界面临灾难性事件，例如彗星撞击或核战争， 保险库中的种子足以让几乎所有可以想象到的植物物种复活。