We have NASA's rules for tweeting in space

When NASA sent Mike Massimino back to low-Earth orbit to service the Hubble Space Telescope in 2009, agency staffers asked him if he'd mind doing another chore while he was up there: draft the first tweet sent from space. Massimino said yes and didn't think too much else about it. The New York native did remember that when he was a younger astronaut, Neil Armstrong had told him that he hadn't planned what he was going to say when he first landed on the moon during the Apollo missions far in advance. Massimino figured he could take the same approach….