Smallest planet shrinks in size

Scientists meet for alien summit
The search for alien life outside our solar system will be at the forefront of discussions by scientists.

Sky survey yields new cosmic haul
Astronomers uncover a haul of new objects in our Solar System - including an unusual icy object.

Meteorite could hold solar clues
A rare meteorite that could hold clues to the Solar System's birth has been bought by the Natural History Museum.

Record spin for newfound asteroid
The fastest spinning natural object in the Solar System is discovered by a British amateur astronomer.

Solar System's 'look-alike' found
Astronomers discover a planetary system orbiting a distant star which looks much like our own.