The James Webb Space Telescope detected atmospheric behavior on WASP-94 A b, a hot Jupiter exoplanet orbiting a distant star, by analyzing how the planet filters starlight during transit. Researchers said the measurements reveal weather-like patterns in an extreme environment where temperatures and winds differ sharply from Earth.
Hot Jupiters are gas giants that orbit close to their host stars, making them valuable laboratories for studying planetary atmospheres under intense radiation. Webb’s infrared sensitivity allowed scientists to distinguish subtle changes in light absorption linked to cloud formation and circulation.
The findings add to a growing catalog of exoplanet atmospheres characterized since the observatory began science operations. Astronomers plan follow-up observations to test models of heat transport and chemical composition on WASP-94 A b.
By examining how the planet filters its host star’s light, researchers identified signatures consistent with dynamic atmospheric processes rather than a static envelope. The work demonstrates Webb’s capacity to probe distant worlds whose conditions cannot be replicated in solar system laboratories.
Observations of WASP-94 A b used the telescope’s capacity to analyze filtered starlight during planetary transit events. Scientists said the resulting data provide evidence of atmospheric dynamics on a hot Jupiter located far beyond our solar system.
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Sources:
https://www.nature.com/news