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Space Telescope Blog

Deep dives on space telescopes - JWST, Hubble, Chandra, and what comes next.

Artist's impression of a Saturn-sized temperate gas giant exoplanet orbiting its host star, similar to TOI-199b. Credit: NASA/JPL-Caltech.
Exoplanets

TOI-199b: JWST's Atmospheric Characterization of a Rare Temperate Saturn-Sized Exoplanet

The James Webb Space Telescope's 2026 observations of TOI-199b reveal a unique atmospheric composition, filling a gap between hot Jupiters and our Solar System's cold giants.

3 min read