James Webb Telescope Maps Fiery Atmosphere of Turbulent Exoplanet WASP 4f682q 121b

James Webb Telescope reveals WASP-121b’s fiery atmosphere and clues to its violent origins. a5kn

Written by Gadgets 360 Staff | Updated: 8 June 2025 16:04 IST

James Webb Telescope Maps Fiery Atmosphere of Turbulent Exoplanet WASP-121b

Photo Credit: NASA 5k6834

James Webb Space Telescope captures detailed atmospheric data of the ultra-hot exoplanet WASP-121b

Highlights

JWST detects silicon monoxide in WASP-121b’s atmosphere for the first t
Methane was found on the nightside, indicating strong vertical atmosphe
WASP-121b likely migrated inward from a colder, distant formation zone

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Astronomers have found a way to see through the turbulent atmosphere of a distant planet that experienced heat and gale-force winds — conditions that are thought to be similar to those on an early version of Earth that was also cold and blanketed by clouds. They accomplished it with the help of the NASA James Webb Space Telescope (JWST). WASP-121b orbits 900 light-years from Earth and circles its star once every 30 hours. That is why it has been shaped like a football and cooked to such a high degree; one side may become hotter than 3,000°C, which is hot enough to melt iron. This hellish world's atmosphere has been analysed in unprecedented detail, revealing complex chemical signatures that hint at its violent origins and ongoing transformation.

JWST Detects Rare Molecules in WASP-121b's Atmosphere, Revealing Planet's Fiery Migration and Extreme Conditions g504m

As per a Uranus in our solar system. This inward spiral, which was probably caused by gravity, cut off frozen material but let carbon-rich gas build up, which is what caused the present imbalance in the atmosphere.

The researchers used a three-dimensional model to depict how the temperature varies from the sunlit side to the night side of WASP-121b. They detected silicon monoxide, indicating that minerals were sponged up from the earliest asteroid impacts. It was hot, yes, but they detected methane on the nightside, a sign of vigorous up-and-down mixing that was pushing back toward the planet from cooler altitudes in the atmosphere. That flies in the face of everything we know about the atmospheres of other planets.

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Observations of ultra-hot gas giants teach us about how atmospheres evolve, and JWST could share new insights. Then again, this could change the way we model and comprehend the formation of the planets around stars that aren't so friendly.

It's not what one would call a gentle planet, WASP-121b, a slapdash world. The observations made by JWST will be deeper, and scientists are eager to learn the variety of types of exoplanets out there in our galaxy.

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