Beginning in 2009, the Kepler Space Telescope began staring intensively at a single patch of sky, about one quarter of one percent of the sky. After staring for four years straight, scientists had identified about 1,200 new planets. Sift through the Kepler discoveries for planets with a variety of Earth-like features, including presence in a habitable" zone, and learn why billions of Earthlike planets are estimated to exist in our galaxy."