The atmosphere of the exoplanet WASP-18 b reaches nearly 5,000 degrees Fahrenheit (2,700 degrees Celsius).
. As a result of this tidal locking, considerable differences in temperature exist across the planet's surface. The Webb measurements, for the first time, enabled scientists to map these differences in detail.
The signature of water detected in the super hot atmosphere of exoplanet WASP-18 b by the James Webb Space Telescope.The measurements found that the most intensely illuminated parts of the planet can be up to 2,000 degrees F hotter than those in the twilight zone. The scientists didn't expect such significant temperature differences and now think that there must be some not yet understood mechanism in action that prevents the distribution of heat around the planet's globe.
"The brightness map of WASP-18 b shows a lack of east-west winds that is best matched by models with atmospheric drag," co-author Ryan Challener, of the University of Michigan, said in the statement."One possible explanation is that this planet has a strong magnetic field, which would be an exciting discovery!"
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