Last month, a comet called Siding Spring, or as it is more formally known, Comet C/2013 A1, flew very close to Mars, dumping several tons of primordial dust into the thin atmosphere of the planet.

While our space programs are in many manners in their own infancy in regards to intergalactic quest, NASA scientists are taking a look at methods to send manned aircraft further than we have ever gone to Mars.