Astronomers have found an alien world that could be the closest known planet smaller than the Earth.
Details have emerged of a mountain rescue team that came across alleged Sputnik debris in 1962.
As the hunt for habitable planets intensifies astronomers are turning their attention to alien oceans.
Astronomers using the Hubble Space Telescope have discovered a new moon orbiting Pluto.
Even with spacesuits and other protective equipment the lunar dust could prove lethal to astronauts.
Richard Branson's flagship commercial space company is set to start flights in December 2013.
Simple organic molecules could be present just a few inches below the soil on the surface of Mars.
Astronomers have discovered two red dwarf stars orbiting one another in a record breaking 2.5 hours.
Observations of a distant dust-filled solar system have shed light on the process of planet formation.
NASA researchers believe that Titan harbours an extensive subterranean layer of liquid water.
Scientists believe that the mantle of Mars contains enough water to cover the planet's entire surface.
A mysterious red cross in the sky in 774AD may have been a previously unrecognised supernova explosion.
China's latest space mission has been a resounding success as the crew landed after 13 days.
Scientists believe they have solved the mystery of what is powering Saturn's turbulent jet streams.
Astronauts have conducted experiments to determine which life forms can survive the vacuum of space.
Special training exercises have taken place underwater in preparation for a manned asteroid mission.
Excalibur Almaz is offering members of the public a trip to the moon in exchange for a £100M fee.
China's latest space mission to dock a manned capsule with their orbiting space lab has been a success.
Move over Face on Mars - Disney's beloved mascot has been photographed by the Messenger probe.
NASA's two Voyager spacecraft are will soon be passing in to the cold dark of interstellar space.