In 2014, the International Space Station had to move three times to avoid lethal chunks of space debris and there is an increasing problem of satellites mysteriously breaking down. With first-hand accounts from astronauts and experts, Horizon reveals the scale of the problem of space junk.

On the 15th December, Tim Peake will launch into space to be Britain's first astronaut on board the International Space Station. For the past two years, Tim has been filming a video diary for Horizon showing the risks, pressures and rigorous training required to launch into space. Horizon also talks exclusively to his wife and two children as they prepare to wave him goodbye on his voyage to space.

On 29 May 2014 ESA astronaut Alexander Gerst, NASA astronaut Reid Wiseman and Maxim Surajew took off from the Russian space agency Roskosmos for six months on the International Space Station. Still fascinated people of space exploration. What was the mission of the astronauts? And what about the life of an astronaut on the ISS really?

On 29 May 2014 ESA astronaut Alexander Gerst, NASA astronaut Reid Wiseman and Maxim Surajew took off from the Russian space agency Roskosmos for six months on the International Space Station. Still fascinated people of space exploration. What was the mission of the astronauts? And what about the life of an astronaut on the ISS really?