Asteroid Belt

The classic movie portrayal of a crowded asteroid belt in our solar system where the asteroids are only meters apart is inaccurate. In reality, the average distance between asteroids is around 965,000 km (600,000 miles) and if you were to fly through it, a collision would be unlikely. Ceres, which is supposed to be the largest object (with a 473 km radius) in the asteroid belt, alone is estimated to hold about a third of the asteroid belt's mass. In fact, the asteroid belt is so not-dense that when sending probes through it, mission control doesn’t even bother calculating a clear path. The chances of hitting something are so low that it’s a waste of time to worry about it. NASA estimates that the odds of hitting an asteroid if you just randomly shoot a probe at the asteroid belt are 1/1,000,000,000.