Space: The undiscovered country. The final frontier. The last vestige of explorers. And, yes, the setting of Star Trek. Space is the greatest mystery and, even though it literally surrounds us, it's the one we ignore the most. When was the last time you sat around and pondered how you're sitting on a planet in the middle of the biggest "ocean" in existence? We did some pondering for you. These 19 jaw-dropping facts about space might just have you wanting more from the universe. Just don't try to build your own Starship Enterprise or anything of the sort. They're not...