The James Webb Space Telescope has revealed that the exoplanet LHS 3844 b, located 48 light-years away, is a scorching, airless "super-Earth" resembling a larger Mercury, with a dark, basalt-rich surface devoid of an atmosphere. Researchers found no signs of geological activity, suggesting the planet may be geologically inactive and similar to the Moon or Mercury in its surface characteristics.
The discovery of LHS 3844 b, a "super-Earth" with a basalt-rich surface and no Earth-like silicate crust, provides a unique opportunity to study the geology of rocky exoplanets without atmospheres. This insight challenges assumptions about plate tectonics and the presence of water on exoplanets, offering a new perspective on planetary formation and evolution. Researchers can leverage these findings to refine models of planetary geology and assess the habitability of other exoplanets.