Atmosphere detected on potentially habitable exoplanet LHS 1140b

While astronomers have previously identified atmospheres around gas giants and sub-Neptunes, those findings often occurred outside the temperate regions where life might thrive. Dr. Collin Cherubim, the study’s lead author, noted that this is the first direct identification of atmospheric species on a rocky world in a habitable zone. The planet, which possesses 5.6 times the mass of Earth and a 70% larger radius, orbits its host star in the constellation Cetus.

LHS 1140b presents a complex profile for researchers. Although tidally locked and likely characterized by a significantly different atmospheric composition than Earth, the planet maintains temperatures conducive to surface water. The host red dwarf, while smaller and dimmer than the Sun, remains relatively stable with minimal flare activity. This combination of a protective atmosphere and a quiet star positions LHS 1140b as the most promising laboratory for studying potential habitability outside our own solar system.