science ๐ญ JWST finds mysteries in ultra-hot Jupiter WASP-121b
New JWST observations are puzzling astronomers regarding the atmosphere of the ultra-hot Jupiter, WASP-121b. Researchers analyzed NIRISS data covering over one full orbit of this planet orbiting its F-dwarf star. The models predicted 12โ15% more emission than observed, and the phase-curve offset varied unexpectedly with wavelength. This suggests complex atmospheric drag or issues in determining the planet's non-spherical radius. These precise observations are now pushing existing planetary models to incorporate more physics. ๐ช