A newly discovered warp in the outer Solar System may have been created by a small, rocky world, much closer to the Sun than ...

For almost a decade, astronomers have been searching for a ninth planet in the solar system. Recently, new evidence of ...

NASA’s planet-hunting TESS mission has found its first Earth-size exoplanet in a star system only 53 light-years from Earth. Another exoplanet, a warm mini-Neptune, was found in the same system. “It’s ...

Scientists have detected a hidden alien planet by examining the orbits of the known worlds in the star system, known as Kepler-139. The newfound exoplanet, called Kepler-139f, is a gigantic world ...