As astronaut and prolific tweeter Chris Hadfield prepares for his return to Earth, we take a look at his highlights in space.

Astronaut Chris Hadfield's highlights in space

International Space Station astronaut Chris Hadfield has recorded a video for David Bowie's Space Oddity - in space.

Astronaut records first ever music video in space

The seventh Earth Hour, an annual event that encourages the public to turn their power off for an hour, has been marked around the world.

The Queen has sent a message to a Canadian astronaut who has become an Internet hit after he started tweeting photographs from space.

Astronauts hovering around 240 miles above the Earth have fielded live questions from around the world in NASA's first live video web chat.

Astronaut Chris Hadfield has posted majestic pictures of Earth from the International Space Station. Here are some of his best images.