ou are on the way to Alpha Centauri but the first thing you need to do is to go outside Solar system. There are an untold number of tiny objects in the asteroid belt that are too all to be seen from Earth, and the thing is: they’re just as lethal as the large objects. At 72,000 miles/hr (32 km/sec) it really doesn’t matter if you hit an object the size of a mouse or the size of a all moon — you’re just as dead.