Exoplanet

Researchers have discovered an Earth-size exoplanet, called LP 791-18 d, beyond our solar system, that could be covered with volcanoes.

Discovery

The exoplanet was discovered based on data from NASA's TESS, the now-retired Spitzer Space Telescope, and ground-based observatories.

Possibility

Given the amount of volcanic activity that could take place on the exoplanet, scientists think the alien world might "sustain an atmosphere."

Habitable distance

The newly discovered exoplanet lies within a habitable distance from its star where scientists think liquid water could exist on its surface.

Future studies

Astronomers hope to conduct "atmospheric studies" of the alien world with the James Webb Space Telescope (JWST).