Want to get away this winter? Consider Kepler-22b, a newly discovered alien world just 600 light-years away where the average temperature is around 72 degrees Fahrenheit. NASA’s Kepler space telescope ...

NASA may have found another Earth. Although it’s 600 light years away and considerably larger than our own planet, Kepler-22b (we win with the catchier name) maintains a 72-degree climate, marking it ...

Kepler-22b is the dream. But the journey is the nightmare. We call it "Earth 2.0"—a Super-Earth in the habitable zone that looks like paradise. But at 600 light-years away, reaching it is the hardest ...