Video was made in 2008 on the International Space Station - but without permission
Of course, if the space agency is wrong, a planet-sized spaceship is heading straight for us
You couldn't live on Kepler-20e or Kepler-20f, but their discovery is still important
Earth-like microbes could survive in large parts of the Red Planet, according to study
New planet could harbour liquid water but scientist casts doubt on whether it is habitable
Above: 'X-43', Barbara Prey, 2005
After nine months and a journey of 422 million miles, Nasa's Phoenix probe touched down in the arctic region of Mars
Forty years ago, Neil Armstrong made a giant leap.
On Monday, seven Nasa astronauts embarked on an 11-day mission to mend the Hubble Space Telescope
Nasa astronauts are repairing the ageing telescope
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