Kepler 22b

Kepler 22b  is an extrasolar planet in the constellation Cygnus occurring 600 light years away from Earth. It's mass is 0.11 and radius of 2.4 and discovered by NASA's Kepler Space Telescope in 2010.

It has a temperature of 262 K and is the first transiting planet to orbit within the habitable zone of a Sun-like star. It's discoverers are the Kepler science team when they looked through their space telescope and, according to science, is larger than Earth and it's star (Kepler 22) is thought to be only slightly smaller than the Sun.

The name "B" in it is because the star was discovered before it so it is named B, very much like the naming of the 1987a supernova. It's right ascension is 19h 16m 52.2s.It is the first extrasolar planet confirmed by Kepler to orbit within it's star's habitable zone.

It's radius is roughly 2.4 times that of Earth's radius but it's mass and surface composition remain still unknown.There is a real theory that the planet is "ocean-like" and similar to another planet, Gliese 1214b.