Gas giants, by contrast, are hydrogen-rich, which should make for a reducing atmosphere. We should see water, methane, and hydrogen sulfide, not carbon dioxide and sulfur dioxide. Planet-scale ...

Rich in heavier molecules. What sets GJ 9827 d apart is its atmosphere's composition. By combining JWST/NIRISS and HST data, Piaulet-Ghorayeb showed that, unlike the hydrogen-dominated atmospheres ...

Astronomers from the National Astronomical Observatories of China have detected the heaviest single element in the atmosphere of an exoplanet. The planet, MASCARA-4, is what's known as an ultra ...

The gas giant, which orbits a bright A-type star 556 light-years away from Earth, has an equilibrium temperature of 2,250 K and a size of about 1.51 Jupiter radii.

If a planet's gravity is low enough, gas molecules can escape simply by having a higher velocity (at a given temperature) than the escape velocity of the planet. If there are no activities (such ...

Ultraviolet light blasting the atmosphere of giant exoplanet WASP-39b is producing a toxic gas called sulfur dioxide. WASP-39b, an exoplanet about 700 light years away, is about as massive as ...

The gas is 17,000 times more potent as a global warming agent than a similar mass of carbon dioxide. It survives in the atmosphere about five times longer than carbon dioxide.