http://www.skyandtelescope.com/astronomy-news/a-partly-cloudy-exoplanet/Artist’s illustration of a cloudy exoplanet. A new study suggests that the Jupiter-like exoplanet 51 Eri b may have partly cloudy skies.
Mark Garlick/University of Warwick
Images of 51 Eri b from GPI (top) and Keck (bottom).
Rajan et al. 2017
Color–magnitude diagrams for brown dwarfs and imaged exoplanets (click for a closer look). The color of 51 Eri b (marked with red star) places it among late T dwarfs, but it is redder than most comparable-temperature brown dwarfs. The tracks for the L–T transition for two different planet masses are shown.
Rajan et al. 2017