JWST
NASA's James Webb Space Telescope has observed an unusually thick haze on the exoplanet Kepler-51d, obscuring its atmospheric composition. This super-puff planet, part of a rare low-density system around the star Kepler-51, challenges standard models of planetary formation. The findings, led by Penn State researchers, were published on March 16 in the Astronomical Journal.
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Astronomers using the James Webb Space Telescope have detected sulfur in the atmospheres of giant exoplanets in the HR 8799 system, suggesting they formed through core accretion similar to Jupiter. This finding challenges previous models, as these planets are five to ten times more massive than Jupiter and orbit much farther from their star. The discovery was led by researchers from the University of California San Diego and published in Nature Astronomy.