A new Earth like planet Kepler 22-b was discovered in 2009 but only confirmed as a planet in 2011. Its made big news in November 2011 as it is thought to be around 2.4 times the size to Earth and orbits a star that is similar to our own star (the sun) around 600 light years away.
More importantly though, it is in the habitable zone, orbiting just the right distance from its star to allow for water to occur in liquid form - essential for life as we know it.
There is a lot that we dont know about it as it is so far away, we dont even know what its atmosphere is like or even if it has one, which is also essential to life.
It was actualy not too long ago. Scientists discovered it Wednesday morning, December 7th 2011.
The planet which was found past Neptune and is 1 1/2 times the size of Pluto has been given a temporary name 2003 UB313. A permanent name has been requested of the International Astronomical Union but hasn't been released yet.
No new gas giant planet has been discovered in our solar system.
New planets are found in other planetary systems almost weekly.
Yes Little Big Planet 2 was released in January 2011 and the Little Big Planet for the Playstation Vita will release on December 31 2011
Gliese 581g
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the only planet that scientists do not consider a planet is Pluto, (but they also found new planets in the asteroid belt.)Pluto
the sun
saturn
Uranium was the first name from 1789; the name is derived from the name of the planet Uranus.
because earth is the only planet which has water,75% of the earth is water but now i think they found out a new planet which also has water in it.