The rocky planet TOI-561 b appears to have an atmosphere that reflects much of the energy it receives from its star. A 37-hour record of the planet’s changing infrared brightness points to moderate heat transfer around the globe and silicate clouds...

Close-in gas giant planets often exist in a state of chemical disequilibrium, where the mixing of gases happens faster than chemical reactions can keep up. By studying planets like HAT-P-11 b, researchers found that the conversion between methane and...