James Webb Telescope Discovers Scorching Super-Earth LHS 3844 b Without Atmosphere
Airless tidally locked planet 48 light-years away reveals barren geology
Source: Science DailyThe James Webb Space Telescope has identified LHS 3844 b, a super-Earth located 48 light-years away, as a dark, airless world with extreme surface temperatures hot enough to melt metal. This tidally locked planet meaning one side permanently faces its star shows no atmosphere and resembles Mercury in its barren, rocky composition. The discovery provides scientists rare insights into the geology of distant exoplanets and how planets lose or retain atmospheres. This research helps understand planetary formation and evolution in different star systems.
- LHS 3844 b is a super-Earth located 48 light-years from Earth
- Planet is tidally locked with permanent dayside temperatures hot enough to melt metal
- Discovered using the James Webb Space Telescope
- Planet has no atmosphere, making it similar to Mercury
- Study reveals insights into exoplanet geology and atmospheric loss mechanisms
Advanced infrared space observatory launched December 2021 by NASA, ESA, and CSA. Orbits at Lagrange Point 2, approximately 1.5 million km from Earth. Primary mission: observe first galaxies, star formation, exoplanet atmospheres, and universe origins. Cost $10 billion USD.
Exoplanet with mass larger than Earth but significantly smaller than Neptune. Typically 1.25 to 10 times Earth's radius. Most common type of exoplanet discovered. May be rocky or have thick atmospheres.
Orbital condition where a planet rotates synchronously with its star's orbit, meaning one hemisphere always faces the star. Creates permanent day and night sides. Common for planets close to their host stars.
Planet orbiting a star outside our solar system. Over 5,500 exoplanets discovered as of 2024. Study helps understand planetary formation, habitability, and universe's potential for life.
UPSC/SSC questions focus on major space discoveries by JWST, exoplanet characteristics (tidal locking, super-Earths), and what these discoveries teach about planetary science and habitability.
LHS 3844 b = 'Lightless Hell Super-Earth' - 48 light-years away, tidally locked (half in darkness), hot as molten metal, airless like Mercury.