@In Exile: You know, I've never been a fan of the "space wonderment" genre actually.
I hate any science fiction where giant luxury cruise liners float through space with their occupants doing little but going on adventures and basically sight seeing on a galactic level. (I'm looking at you Star Wars/Trek)
Any real space exploration is going to be dangerous, serious, dirty and filled with work work work. Far more akin to ocean voyage during the Age of Sails... than taking a nice jaunt to the islands on a Disney ship.
SO.... to that end, I actually find Cash's music appropriate.
That doesn't mean you have to, just sharing my thoughts on the topic.