geekosystem

Even if you're not a Twitter nut, astronauts are some of the most worthwhile people you can follow on Twitter. Let's face it: while they're interesting people in their own right, being able to send never-before-seen pictures directly from space is a pretty good way to get popular fast. Though you could track them down yourself, we thought it'd be helpful to compile a list of astronauts on Twitter who are currently active: