ESA astronaut Tim Peake during spacewalk training in Houston, USA. <br />Training underwater on life-size mockups of the Space Station is one way astronauts prepare for their missions as working in water resembles working in space. <br /> <br />Tim is training for his mission to the International Space Station set to be launched on a Soyuz spacecraft from Baikonur Cosmodrome in Kazakhstan in December 2015.
