It can be used to find out when an asteroid or comet will hit the Earth.

The comet drops from the sky and hits the crater.

That comet really did hit the back side of the Moon.

That comet probably won't hit, and we sure as hell don't want to be owning foreign cars after it goes by.

First I knew, one of the girls was yelling that the comet had hit us.

At the song's conclusion the comet hits the Earth and destroys everything.

Some people think they died after a comet or large meteorite hit earth.

If a comet should hit us, we couldn't stop it.

We'll have to gamble that the comets won't hit near them.

As noted, it seems very likely that, 65 million years ago, a comet did indeed hit the Earth.