Observational constraints of exoplanet clouds

Abstract

We entered a new era in extrasolar planets characterisation. We are indeed given access to constraints on their meteorology. New facilities have been designed specifically for exoplanet atmospheric characterisation. Higher spectral resolution of exoplanet atmosphere observations allow us to infer atmospheric properties with unprecedented details, including the presence of clouds. Moreover, time varying observations could in principle study the variability of exoplanet atmospheres, such as climate and cloud coverage temporal variations. Here we will review the recent observational constraints relative to clouds in exoplanet atmospheres, as well as discuss the exciting prospects for the near future.