Methane found on distant world

Probe studies solar system's end
A Nasa spacecraft has been launched into orbit to study the edge of our Solar System.

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.

Smallest planet shrinks in size
The smallest planet in the Solar System has become even smaller, studies by the Messenger spacecraft show.

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.