Thursday, June 12, 2025

Webb Shows Another Jupiter Forming in Real Time

Artist's impression of the YSES-1 System consisting of the ~16 Myr Sun-like star in the center, YSES-1 b and its dusty circumplanetary disk (right), and YSES-1 c with silicate clouds in its atmosphere (left). Credit: Ellis Bogat.

Astronomers have used JWST to study a fascinating planetary system that's only 16.7 million years old, with two bizarre giant exoplanets. Designated YSES-1, its closer planet, YSES-1b seems to be surrounded by a disk of material that could be the birthplace of moons, similar to what might have happened at Jupiter billions of years ago. The other, YSES-1c, has a layer of silicate particles in its upper atmosphere—clouds of sand.



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