Antti Penttilä (born 1977) is University Researcher and Adjunct Professor (Docent) at the University of Helsinki, Finland. Dr. Penttilä received his PhD degree in astronomy at the University of Helsinki in 2011. He is interested in planetary sciences, and especially the photometric, polarimetric, and spectroscopic properties of surfaces of Solar System bodies, such as the regolith layers on asteroids and the Moon.