Post by Max Planck Institute for Astronomy

🔭 The James Webb Space Telescope (JWST) has provided groundbreaking insights into the rocky exoplanet LHS 3844 b. This tidally locked planet always faces its cool red dwarf star, resulting in extreme surface temperatures of around 1000 Kelvin (approximately 725°C). Here are the key findings of the team led by Laura Kreidberg (MPIA) and Sebastian Zieba (Center for Astrophysics | Harvard & Smithsonian): ·      LHS 3844 b has a dark and hot surface, devoid of an atmosphere. ·      JWST’s analysis shows that LHS 3844 b likely has a surface composition of basalt or mantle rock, differing significantly from Earth's silicate-rich crust. ·      The results suggest LHS 3844 b may have experienced significant space weathering. Its surface is a dark regolith, similar to that of planet Mercury or the Moon, possibly shaped by meteorite impacts and stellar irradiation. ·      Observations indicate a lack of geological activity, as no volcanic gases were detected, suggesting a prolonged period of geological dormancy. These findings not only enhance our understanding of exoplanetary geology but also offer a glimpse into the processes shaping rocky worlds beyond our solar system. What are your thoughts on the implications of these findings for our understanding of planetary formation? We welcome your opinions and questions in the comments! #Exoplanets #JWST #PlanetaryScience #SpaceWeather https://lnkd.in/dKz2gJj5