Canadian astronaut Chris Hadfield's rendition of "Space Oddity," an astronomically popular music video shot in the International Space Station, is going offline today. According to a tweet by Hadfield, the song was posted under a year-long license from David Bowie's publishers, and it expires today. That means that the song will need to be pulled from YouTube, although Hadfield's son and publicist Evan says they're hoping to find a way to make it available again. "We're working with the CSA and Bowie's licensers to hopefully find a way to keep it up," he says, though he declined further comment.