Exoplanets with relatively clear atmospheres are prime targets for detailed studies of chemical compositions and abundances. Alkali metals have long been suggested to exhibit broad wings due to pressure broadening, but most of the alkali detections only show very narrow absorption cores, which probably hints the presence of clouds. We have been

Much of our understanding of gas giant exoplanets come from those transiting in front of bright stars at small orbital separations (P 3 days, a 0.05 au). These hot Jupiters are coupled to their host star: stellar irradiation impacts the chemistry and temperature structure of their atmospheres and tidal interactions affects the orbital dynamics and

The observation of exoplanets during their primary transits and secondary eclipses is a powerful tool to characterise their atmospheres. These observations provide important information about their temperature structures and circulation efficiencies, as well as the ability to detect the presence of clouds, hazes and specific molecular features

Starmus is a global festival of science communication and art that brings together the most brilliant minds on the planet. The festival is a gathering of top artists and scientists celebrated every two years. The aim of the project is to inspire and educate the next generation of explorers and regenerate the spirit of discovery. Starmus combines

Surveys have shown that super-Earth and Neptune-mass exoplanets are more frequent than gas giants around low-mass stars, as predicted by the core accretion theory of planet formation. We report the discovery of a giant planet around the very-low-mass star GJ 3512, as determined by optical and near-infrared radial-velocity observations. The planet

In this presentation, we describe several months of monitoring of Gault since January 2019 using various telescopes and instrumentation. The goal is to characterize and to model the asteroids and the tails to impose constraints on the physical properties of the ejected dust, and to shed light on the activity timeline and the causes for the ejection