TOI-199 b Archives

Artist's impression of a gas giant planet orbiting its distant host star. New research, led by astronomers at Penn State and the Jet Propulsion Laboratory, used NASA’s James Webb Space Telescope to analyze the atmosphere of a gas giant planet about the size of Saturn but with Earth-like temperatures and found it to be rich in methane. Credit: NASA/JPL-Caltech.

Astronomy & Telescopes, Atmospheres, Climate, Weather, Biosignatures & Paleobiology, Exoplanets, -moons, -comets, Gas Giants, Habitable Zones, Imaging & Spectroscopy, Press Release

Atmosphere Of Saturn-sized Planet With Earth-like Temperature Contains Methane

by Keith CowingMay 21, 2026May 21, 2026

A planet that is about the size of Saturn, but with a temperature more like Earth’s, has an atmosphere rich in methane, according to a new study using NASA’s James […]

Top: Maximum A Posteriori (MAP) model and 2σ credible regions from ExoTR retrievals on the fiducial reduction, overlaid with data binned at ∆λ = 0.05 µm. Also shown are the contributions from each molecule and clouds to the transmission spectrum. Bottom: 1D histograms of the posterior distributions from the retrieval results, including the median and ±1σ uncertainties (i.e. 16th and 84th percentiles).-- astro-ph.EP

Atmospheres, Climate, Weather, Biosignatures & Paleobiology, Exoplanets, -moons, -comets, Gas Giants, Status Report

Methane On The Temperate Exo-Saturn TOI-199b

by Keith CowingNovember 28, 2025November 28, 2025

Temperate (Teq<400 K) gas giants represent an unexplored frontier in exoplanet atmospheric spectroscopy. Orbiting a G-type star every ~100 days, the Saturn-mass exoplanet TOI-199 b (Teq=350 K) is one of […]