Relative sizes of the newly discovered habitable-zone planets and Earth. Left to right: Kepler-69c, Kepler-62e, Kepler-62f and Earth (except for Earth, these are artists' renditions). Image credit: ...

The planet appears to have a size and orbit similar to Earth’s, while it may also lie within its star’s so-called “habitable ...

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 ...

The ultra-low-density planet Kepler-51d is surrounded by the thickest layer of haze found on a planet yet, according to a new study that used NASA’s James Webb Space Telescope to take a deeper look at ...