James Webb Space Telescope Reveals Insights on Airless Super-Earth Kua'kua
JWST Studies a Dark and Airless Super-Earth
Universe Today
Image: Universe Today
The James Webb Space Telescope has studied LHS 3844 b, also known as Kua'kua, a super-Earth located 48 light-years away. This barren planet shows no atmosphere and has a surface resembling dark, volcanic rock, indicating a lack of geological activity and water.
- 01Kua'kua orbits its red dwarf star Batsu every 11 hours and has a surface temperature of around 1000 Kelvin.
- 02The planet's surface is likely composed of volcanic rock, ruling out Earth-like silicate crusts.
- 03The absence of an atmosphere suggests Kua'kua has not been geologically active for a long time.
- 04Space weathering processes may darken the surface, similar to the Moon's regolith.
- 05Further observations with the James Webb Space Telescope will enhance understanding of Kua'kua's geological history.
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LHS 3844 b, informally named Kua'kua, is a super-Earth located approximately 48 light-years from Earth. Discovered by the Transiting Exoplanet Survey Satellite (TESS) in 2018, Kua'kua is about 30% larger than Earth and orbits its red dwarf star Batsu every 11 hours. The James Webb Space Telescope (JWST) recently analyzed Kua'kua using its Mid Infrared Instrument (MIRI), revealing a barren, rocky surface devoid of an atmosphere. Researchers led by Sebastian Zieba from Harvard's Center for Astrophysics found that the planet's surface likely consists of dark, volcanic rock rather than Earth-like silicate crusts, indicating limited geological activity and minimal water presence. The study suggests that Kua'kua may resemble Mercury in surface characteristics but is significantly hotter. Ongoing observations with JWST aim to further clarify the planet's geological history and surface conditions, potentially providing insights applicable to other rocky exoplanets.
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