If ever there was a Big Blue Thinker, it's Chris Hadfield, until today the commander of the ISS. When he's not been running his ship for the last five months he's been delighting people worldwide with his gorgeous pictures of Earth plus a stream of amusing and educational tweets and videos. And just out is the first-ever space music video - his rendition of David Bowie's Space Oddity, shot as he floats around the station with his guitar. He has a sweet voice too. Nearly five million have watched this already on YouTube. The last words of the song (just a little bit rewritten to suit the occasion) are so perfect for a happy astronaut heading back home - "Planet Earth is blue and there's nothing left to do..."
Hi, I'm Lindsey Dawson.