Approximately 4,000 exoplanets have been discovered, a significant portion being gas giants, with a smaller subset considered potentially Earth-like or "super-Earths" (larger, rocky planets with ...

Narrator: Astronomers have found dozens of potentially habitable planets outside of our solar system. That's dozens of chances to discover the first alien life! Or plenty of places we could park our ...

NASA’s Kepler mission has discovered the first Earth-size planets orbiting a sun-like star outside our solar system. The planets, called Kepler-20e and Kepler-20f, are too close to their star to be in ...

Artist's illustration of the super-Earth alien planet Kepler-69c. "Super-Earth" planets are giant-size versions of Earth, and some research has suggested that they're more likely to be habitable than ...