Kepler-7b is to date the only exoplanet for which clouds have been inferred from the optical phase curve — from visible-wavelength whole-disk brightness measurements as a function of orbital phase.

At optical wavelengths, Titan’s brightness for large Sun-Titan-observer phase angles significantly exceeds its dayside brightness. The brightening that occurs near back-illumination is due to ...

Do rainbows exist on distant worlds? Many phenomena that happen on Earth—such as rain, hurricanes, and auroras—also occur on other planets in our Solar System if the conditions are right. Now we have ...

The atmospheres of exoplanets have been a focal point of the field lately, with the James Webb Space Telescope taking a look at as many as it can manage. But time on the world's most powerful space ...