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

— -- Astronomers on Monday reported the discovery of an Earth-like planet outside the solar system whose size and distance from its own star put it in the "habitable" zone and make for a surface ...

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

All seven roughly match the size and mass of our own planet and are almost certainly rocky. Researchers announced Wednesday the stunning discovery of seven Earth-like planets orbiting a small star in ...

The supposed "strange signals" were not mysterious at all, but commonly observed transit signals, according to NASA.

One of the worlds in the TRAPPIST-1 system, a mere 40 light-years away, just might be clad in a life-supporting atmosphere. In exciting new JWST observations, the Earth-sized exoplanet TRAPPIST-1e ...

Our science fictions dreams of Martians may never come true, but three earth-like planets discovered orbiting a nearby star have potential life and water, astronomers announced Monday. The sizes and ...

It's been about twenty years since the discovery of the first definitive proof that there are planets outside our solar system, and today NASA has revealed that it has found the first near-Earth-sized ...