The Kepler space telescope has confirmed its first planet in a habitable zone outside our solar system. Spinning around its star some 600 light years away, Kepler-22b is 2.4 times the size of the Earth, putting it in a class known as “super-Earths.”
The Kepler space telescope has confirmed its first planet in a habitable zone outside our solar system. Spinning around its star some 600 light years away, Kepler-22b is 2.4 times the size of the Earth, putting it in a class known as “super-Earths.”