The Asteroid Belt is dangerous.

The image we have in our head (thanks to movies) of a dense field of tumbling rocks does not exist. The Asteroid Belt is a zone between 200 and 300 million miles from the sun that is basically an incredibly desolate nothingness. If you pulled all of the asteroids together they’d only weigh about 4% the mass of our moon. That’s why NASA makes such a big deal about even just one asteroid colliding with another.