Astronomers have characterized the atmosphere of a young (20 Myr old) transiting exoplanet and found it to be unusually clear and puffy. By analyzing the planet's atmospheric features, they were able ...

NASA's James Webb Space Telescope has peeled back the layers on sub-Neptunes, a type of gassy exoplanet scattered in large numbers throughout the universe. While sub-Neptunes' thick atmospheres have ...

Unlike the James Webb Space Telescope's views of other sub-Neptune exoplanets' atmospheres, its look at TOI-421 b was clear. Credit: NASA / ESA / CSA / Dani Player illustration A sweltering planet ...

A new report explains a young star system where low-density planets show how super-Earths and sub-Neptunes begin to form, based on new findings from the V1298 system ...