Home / Science / Webb Telescope Reveals Mercury-like Exoplanet
Webb Telescope Reveals Mercury-like Exoplanet
8 May
Summary
- Webb telescope offers clearest exoplanet surface view.
- Planet LHS 3844 b is a desolate, airless, hot world.
- Surface composition suggests dark, ancient volcanic rock.
Astronomers have achieved an unprecedented look at the surface of an exoplanet using NASA's James Webb Space Telescope. The planet, named LHS 3844 b and orbiting a red dwarf star 49 light-years away, is a rocky world about 30% larger than Earth. Data indicates it is a barren, airless environment with extreme temperature variations, rendering it uninhabitable.
Observations suggest a surface resembling Mercury, covered in dark regolith formed from billions of years of bombardment. This exoplanet is tidally locked, with its star-facing side reaching about 1,340 degrees Fahrenheit (725 degrees Celsius), while the other side shows no detectable heat. The spectral analysis of infrared light points to dark volcanic rocks, likely basalt, as the dominant surface material.
This breakthrough allows direct study of exoplanet geology, offering context for our own solar system. Unlike Earth, where granite formation is linked to water and plate tectonics, LHS 3844 b's surface composition and lack of atmospheric gases like sulfur dioxide suggest a vastly different geological history and an environment devoid of conditions necessary for life.
