How common are planets like Earth? That’s been a question astronomers and dreamers have pondered for decades, and now, thanks to the Kepler spacecraft, they have an answer. One in five Sun-like stars in our galaxy have Earth-sized planets that could host life, according to a recent study of Kepler data. “What this means is, … Continue reading "22% of Sun-like Stars have Earth-sized Planets in the Habitable Zone"