Kepler 22b: earth-like planet discovered

NASA’s Kepler space telescope has discovered a planet in a habitable zone around a star with similar conditions to our own Sun. Kepler 22b’s year is 290 days long and scientsts estimate the surface temperature is around 72 degrees, although they are not sure if the planet is made up of water, gas or rock. Kepler 22-b lies about 600 light-years away from earth and is about 2.4 times the size of Earth.