Clouds and Hazes in Exoplanet Atmospheres

Aerosols -- clouds and hazes -- are ubiquitous in planetary atmospheres. These aerosols shape the observable atmospheres of planets within and beyond the Solar System, with consequences for atmospheric chemistry, atmospheric dynamics, and atmospheric evolution. I will discuss our current understanding of exoplanet clouds and hazes as revealed by observations from Hubble, JWST, and ground-based telescopes; the current state of the art for including aerosols in atmospheric models; and the past few years of laboratory haze studies, including unexpected carbon and sulfur sources for haze formation and their implications for warmer exoplanet atmospheres. Finally, I will outline the greatest needs for future laboratory work and observations that can bring us closer to understanding photochemistry and cloud condensation on diverse worlds.