Gliese 581g is in the 'Goldilocks zone' of its solar system, where liquid water could exist, and is a strong contender to be a habitable world. Astronomers have discovered a potentially habitable planet of similar size to Earth in orbit around a nearby star.
A team of planet hunters spotted the alien world circling a red dwarf star called Gliese 581, 20 light years away.
http://www.guardian.co.uk/science/20...et-gliese-581g
Note:Wednesday 29 September 2010