Astronomers are on the hunt for a massive undiscovered planet lurking in our own solar system.
It is believed that more than 50 of those discovered may be able to support life as we know it.
NASA's Kepler telescope has discovered the smallest known planet outside our Solar System.
A 45-year-old gas worker has discovered four new planets from home in his own spare time.
Two scientists have come up with a method to detect forests on extrasolar worlds.
NASA's Cassini spacecraft has taken detailed pictures of a vast storm on the planet Saturn.
Pluto may have been demoted but it turns out it is the largest body in the outer solar system after all.
For the first time scientists have observed a planet that originated outside our own galaxy.
Astronomers have discovered two Jupiter-like planets orbiting two close sister stars.
A senior NASA official has announced a project to create a new type of interplanetary spacecraft.
NASA has greenlit an ambitious Mars mission designed to study how the planet lost its atmosphere.
An Earth-like planet only 20 light years away has been tipped as having the perfect conditions for life.
The planet Jupiter will be particularly bright in the night sky during its closest approach this month.
Scientists are hopeful that a space telescope to be launched in 2014 will be able to see oceans on other planets.
The planet Neptune is nearing the end of its first complete orbit since it was discovered in 1846.
With interest in Venus increasing NASA are considering ways in which to explore the planet in a future mission.
A rare shrimp that could be the oldest animal species on the planet has been found alive and well in Scotland.
Remains of the largest rat every to walk the planet have been discovered in a cave in East Timor.
NASA's Messenger probe has revealed intense electromagnetic storms in the planet's magnetic "tail".
Astronomers have spotted an unusual planet that's size and position in relation to its star is baffling.