The James Webb Space Telescope has peered into the atmosphere of Saturn's largest moon Titan, capturing the first evidence of cloud formation in this moon's northern hemisphere. Titan is the second largest moon in the solar system,

Is frozen water scattered in systems around other stars? Astronomers have long expected it is, partially based on previous detections of its gaseous form, water vapor, and its presence in our own solar system.

Webb Space Telescope reveals a surprisingly clear atmosphere on planet TOI-421 b, helping scientists understand the evolution of sub-Neptunes.

Astronomers didn’t even know sub-Neptunes existed until NASA’s Kepler mission uncovered them over the past decade. Although a few times larger than Earth, they are far smaller than gas giants and usually cooler than hot Jupiters, making them difficult to study with earlier telescopes.