As scientists delve deeper into a star system with seven rocky worlds, the prospect of one being a habitable planet seems to be quickly fading. Researchers who used the James Webb Space Telescope, a ...

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

Is our Milky Way galaxy home to other planets the size of Earth? Are Earth-sized planets common or rare? NASA scientists seeking answers to those questions recently revealed their discovery. “We went ...

TRAPPIST-1e, an Earth-sized world in the system’s habitable zone, is drawing scientific attention as researchers hunt for signs of an atmosphere—and potentially life-supporting conditions. Early James ...

A new study has proposed the existence of Planet Y, an alternative Planet Nine candidate that is smaller and closer to Earth than the hypothetical Planet X, which astronomers have been hunting for ...

Scientists did not find a robust atmosphere around TRAPPIST-1d, an Earth-size exoplanet many hoped would show signs of having air. - NASA / ESA / CSA / J. Olmsted illustration As scientists delve ...