Channel 4 plans to broadcast a complete orbit of the International Space Station live on air later this year with Dermot O'Leary as host.

The show will link live to the astronauts from mission control in Houston as they make a 90-minute circuit of the Earth on the ISS which orbits 250 miles above.

The show will also feature contributions from Professor Stephen Hawking and British astronaut Tim Peake, who is due to join the crew of the ISS next year.

The set of three shows will also give an insight into life on the Space Station from astronauts Rick Mastracchio and Koichi Wakata, from the effects of gravity on daily tasks and how it affects the body.

Another episode will look at the work done by mission control to support astronauts on the space station, including a treacherous space walk to repair the Hubble Space Telescope.

O'Leary, who has presented talent show The X Factor since 2007, said: "Like most of my Star Wars/Trekkie generation, space has always held a fascination.

"It's already been an education to research this project and so I can't wait to join the viewers in finding out both the spectacular workings of the ISS. I simply can't wait."