Proposed by British scientists as a joint effort of NASA and the European Space Agency, the mission would offer the first close-up view of Uranus in 25 years.
Sextillion: Astronomers now say there are 300 sextillion stars. That's 200 sextillion more than previously thought.
A huge mass of magnetically charged material ejected from the sun is racing across space toward our planet, where it is expected to arrive on Tuesday. When it strikes the Earth's magnetic field, it could produce spectacular auroras.
The moon, long thought to be bone-dry, actually has a little water, new research shows.
A fiery planet orbiting a distant star is having its atmosphere stripped away, producing a tail similar to that of a comet.
A meteor storm predicted for next year could imperil satellites and the space station, say NASA experts.
The Japanese spacecraft won't survive re-entry, but it will launch a small capsule containing collected space material that hopefully lands in Australia.
Launched by the US Air Force on April 22 from Cape Canaveral, the top-secret X-37B space plane has been spotted, photographed, and tracked by amateur satellite watchers.
The Hubble space telescope has spotted a star in the act of consuming a planet that is skimming around it.
Children are being given the chance to name their own minor planet in a competition to mark the 80th anniversary of the discovery of Pluto. Space scientists' ruling body the International Astronomical Union has promised to consider the winning entries for real worlds now being discovered.