I grow ever more impatient everytime I hear of voyages being launched or to be launched only at the moon or mars or pluto! Why don't we launch interstellar travels? Certainly the Orion propulsion system can get us to Alpha Centuari in under a century! We have the capability! And then there is an issue, though, communication. I've always wondered, we can't send probes to faraway stars because it would take ages for their information to come back to us. How can we communicate with each other when we are at such distances?