Canadian astronaut Chris Hadfield has been sending tweets from out of this world, conversing with Spock, Sulu, Buzz Aldrin, and Captain James T Kirk.
Hadfield, who is aboard the International Space Station, has been tweeting stunning photos of Earth from space, and answering questions from followers about the mission.
Fellow Canadian William Shatner, who played the Captain James Tiberius Kirk of Star Trek's USS Enterprise, asked Hadfield whether he was tweeting from space.
"@WilliamShatner Yes, Standard Orbit, Captain. And we're detecting signs of life on the surface," Hadfield quipped.
The conversation was then picked up by George Takei who played Hikaru Sulu, who posted the conversation on his Facebook page with the comment "This actually happened".