It took hundreds of scientists worldwide, including several CNRS teams, to produce the world’s largest digital camera, the LSST (Legacy Survey of Space and Time), which has finally arrived in Chile. Mounted on the telescope at the Vera C. Rubin Observatory, it will scan the southern sky in order to investigate and map the Universe, determine the nature of dark energy and dark matter, and even detect any asteroids that might pose a threat to our planet.