I am a writer of science fiction and I need to know some basics about space travel. I've read that it would take a ship 40 years to travel 1 parsec (3.26 light years) if the ship moved at 10% the speed of light. Does that sound right? Given that a futuristic ship could travel at this speed, how many kilometers would the ship travel in one hour? Should a ship slow down when cruising through a solar system or approaching an asteroid where, in this case, it needs to land at a port. This said asteroid is traveling in an orbit about 3.26 light years out of the Centuari system.