Yesterday, the European Southern Observatory announced they'd confirmed the existence of a planet in Alpha Centauri, the star system nearest to Earth. For many of us, it was like a dream come true. In the annals of science fiction, Alpha Centauri is like the Mars of star systems. Because it's the closest system to our own — only 4.3 light years away! — we've spent decades speculating about colonizing the place. Or meeting the aliens who already live there.