Daytime observation of the Sun: with sunglasses and telescopes, discover sunspots and prominences. Evenings under the stars: identify the constellations, discover the visible planets, observe the Moon, star clusters and galaxies through a telescope… Guided geological walks: follow in the footsteps of the Earth’s past, reading landscapes, rocks, fossils and tectonic folds. Lectures open to all: on the origins of the universe, the evolution of the Earth, exoplanets and asteroid impacts. Make sundials, models of planetary systems, experiments on gravity and the formation of craters.