On Twitter, messages of 140 characters may seem confining. Mike Massimino is finding a different type of space even more limiting — outer space. The astronaut is sending messages to the social networking site from 350 miles above Earth on the space shuttle Atlantis — and what’s cramping his “tweets” is time, not the character limit.
On Earth, Massimino tweeted about having dinner, eating lunch, working out in the gym and watching a movie. In space, he just doesn’t have the time to tweet the routine, if you consider anything on orbit routine.
