There were many planets and asteroids circling the sun.

周围有许多星和小星。

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

小星靠近小星带，它们是岩石而非气体。

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

接下来，小星会变成非小星吗？

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

据信，在所有已知的小星中，有近10000是近地小星。

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

系中的小星也没有这种形状的。

But an asteroid zipped by us yesterday.

但是我们昨天同小星擦身而过。

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

例如把它称作“325小星”。

It's going to attempt to move an asteroid.

NASA将试图移小星。

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

小星又被成为微型星，不要把它和像冥王星这样的矮星混淆了。

And four times further than the asteroid belt.

比小星带的四倍还多。

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

这小星就是这么大岁数了。

Those asteroids sometimes pass very close to us.

那些小星有时会离我们非常近。

Can we really harness an asteroid?

我们真的能控制小星吗?

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

这为小星提供了反方向的微弱推进力。

The spacecraft is scheduled to make impact next Monday.

航天器定于下周撞击小星。

Closer in, in the asteroid belt.

在接近点，在小星带里。

In this case, an asteroid hitting the Earth.

在这个例子中，坏事为小星撞击地球。

But a small planet also had drawbacks.

但是小星也有不好的地方。

Asteroids are also called minor planets.

小星也被称为微型星。

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

周晚，美国国家航空航天局的“双小星重定向测试”宇宙飞船撞上了小星。