Exoplanet with Volcanoes and Potential for Liquid Water Discovered

A newly discovered exoplanet, LP 791-18d, orbiting a small star about 90 light-years from Earth, has a radius and mass very similar to Earth's, suggesting it also has a rocky composition. Based on what we know of the star, it can potentially contain liquid water. And, based on the forces exerted by nearby planets, it's likely to have very active geology, potentially including volcanoes. The exosolar system at the star LP 791-18 was first discovered by the Transiting Exoplanet Survey Satellite (TESS).