When astronomers announced Kepler-452b, they were not just adding another distant world to a growing catalog. They were ...

NASA scientists announced Monday that they had found the first Earth-sized, potentially habitable planet. The planet, currently known as TOI 700 d, is about 100 light years away. It is orbiting a star ...

Eleven years ago today, NASA made an intriguing announcement. Using the Kepler space telescope, the agency had discovered an exoplanet the size of Earth located in the habitable zone of another star.

A NASA mission has spotted an Earth-size exoplanet orbiting a small star about 100 light-years away. The planet, named TOI 700 e, is likely rocky and 95% the size of our world. The celestial body is ...

Exoplanets like Earth have been discovered but not all Earth-like planets are equal when it comes to alien life.

CAPE CANAVERAL, Fla. -- For the first time ever, astronomers have discovered seven Earth-size planets orbiting a nearby star - and these new worlds could hold life. This cluster of planets is less ...

A newly discovered warp in the outer Solar System may have been created by a small, rocky world, much closer to the Sun than the hypothesized Planet Nine. According to a new measurement of the Kuiper ...