Chris Hadfield has spent the past five months on the ISS. And, if you regularly follow our site, you’ll know that the media-savvy astronaut has engaged earthlings with a steady stream of tweets, a series of educational videos (see below), and the occasional entertaining routine. In recent months, he has kibitzed with William Shatner and even strummed a tune for Peter Gabriel. Now, before handing over command of the ISS to a Russian cosmonaut, Hadfield bade us farewell by singing a zero gravity version of “Space Oddity,” the song that helped launch David Bowie’s music career back in 1969. What could be a more perfect pick? In case you’re wondering, Hadfield is playing a Larrivée Parlor guitar, which he used to make the first album ever recorded in orbit. We’ll eventually tell you more about that….