I'm posting this under the guise that it is copyright related. But it's really because it's an awesome video, I'm a Bowie fan, and I think Commander Chris Hadfield is the ultimate geek rockstar.
http://www.economist.com/blogs/economist-explains/2013/05/economist-explains-12?fsrc=scn%2Ftw%2Fte%2Fbl%2Fee%2Fcopyrightinspace
http://www.economist.com/blogs/economist-explains/2013/05/economist-explains-12?fsrc=scn%2Ftw%2Fte%2Fbl%2Fee%2Fcopyrightinspace