TITLE: Dynamics, Geometry and Solar Sails AUTHORS: Ariadna Farres and Angel Jorba Departament de Matematiques i Informatica Universitat de Barcelona, Gran Via 585, 08007 Barcelona, Spain E-mails: ariadna.farres@maia.ub.es, angel@maia.ub.es ABSTRACT: This note focuses on some dynamical aspects of a solar sail. The first part of the paper is a survey of the use of dynamical systems tools to control a solar sail near an unstable equilibrium point of the Earth-Sun system. The second part focuses on new results on the dynamics near an equilibrium point of a sail near an asteroid. The main tool is a reduction to the centre manifold to focus on the bounded motions. In both cases, the role of the geometrical structures of the phase space is highlighted. This is the text of a presentation given at the Workshop "Dynamics and Geometry", Leiden, June 2015.