UK astronaut Major Tim Peake training underwater
24 January 2014 Last updated at 08:29 GMT
The UK's first official astronaut, Major Tim Peake, has been training underwater to prepare him for space.
He's heading to the International Space Station for a mission next year.
Major Peake is training at the European Astronaut Centre in Germany, where he's using a pool to try and experience what it's like to work in zero gravity.
Watch this clip of Major Tim Peake talking underwater!