There were many planets and asteroids circling the sun.

太阳周围有许多和。

Closer in the asteroid belt, these are rocks not gas.

靠近带，它们是岩石而非气体。

Next up, though, could an asteroid ever become a disasteroid?

接下来，一颗会变成一颗非吗？

It is believed that nearly 10,000 of all known asteroids are NEAs.

信，在所有已知的中，有近10000颗是近地。

None of the asteroids in our solar system look like that.

太阳系中的也没有这种形状的。

But an asteroid zipped by us yesterday.

但是我们昨天同一颗擦身而过。

He might call it, for example, " Asteroid 325."

例如把它称作“325”。

It's going to attempt to move an asteroid.

NASA将试图移动一颗。

Asteroids are also called minor planets, not to be confused with dwarf planets like Pluto.

又被成为微型，不要把它和像冥王这样的矮混淆了。

And four times further than the asteroid belt.

比带的四倍还多。

That's how old the asteroid is estimated to be.

这颗就是这么大岁数了。

Those asteroids sometimes pass very close to us.

那些有时会离我们非常近。

Can we really harness an asteroid?

我们真的能控制吗?

This gives the asteroid a small kick in the opposite direction.

这为提供了反方向的微弱推进力。

The spacecraft is scheduled to make impact next Monday.

航天器定于下周一撞击。

Closer in, in the asteroid belt.

在接近一点，在带里。

In this case, an asteroid hitting the Earth.

在这个例子中，坏事为一颗撞击地球。

But a small planet also had drawbacks.

但是也有不好的地方。

Asteroids are also called minor planets.

也被称为微型。

And a NASA spacecraft named Dart rammed into an asteroid late Monday.

周一晚，美国国家航空航天局的“双重定向测试”宇宙飞船撞上了一颗。