Want a ride in a spaceship? It will cost you about 20 million US dollars. At least that's what Dennis Tito recently paid for a trip to the International Space Station. What if you aren't rich, but still want to travel in space? Don't worry. Research supported by NASA might make your dream come true. Scientists are refining a process that, if successful, will enable rockets to take off from the back of an airplane. If people do end up taking vacations in space, don't worry about finding somewhere to stay. Businessmen like British Richard Branson are already thinking about building hotels out there.