635 light-years from where you are sitting, way out in outer space, lies a planet. The first planet to be discovered inside the habitable zone of a Sun-like star. Its name is Kepler 22-b. When a planet is located within a star's habitable zone, it means that there is a chance that liquid water exists on its surface. And where there's water, there’s also the possibility of life. Human life. What would the weather be like over there?