Abu Dhabi: NYU Abu Dhabi researchers, along with NASA’s James Webb Telescope team, used advanced technology to study a Jupiter-sized exoplanet’s climate. The study, detailed in Nature Astronomy, reveals insights into the planet’s atmosphere.
Observations of WASP-43b’s entire orbit unveiled its temperature distribution and climate. Surprisingly, clouds were found on the planet’s nightside, unlike typical Earth clouds.
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Despite resembling Jupiter in size, WASP-43b has distinct characteristics due to its proximity to its cooler, redder star. Its year lasts only 19.5 hours, causing one side to be scorching hot and the other freezing cold.
Using infrared spectrometry, researchers analyzed the planet’s atmosphere, identifying chemical composition, cloud coverage, and heat redistribution. They found extreme temperature differences between day and night, leading to powerful winds shaping the planet’s climate.
The planet’s nightside, despite being permanently shadowed, remains hot, with temperatures reaching 1,115°F. Thick clouds composed of rocks and minerals cover the nightside, blocking infrared radiation.
Surprisingly, water signals were detected on the nightside, revealing the unusual altitude and density of the clouds. Wind-driven mixing ensures uniform atmospheric chemistry throughout the planet.
The study sheds light on exoplanetary atmospheres and the complex interactions shaping their climates.
NYU Abu Dhabi Webb Telescope exoplanet
