New observations using the High Accuracy Radial velocity Planet Searcher (HARPS) spectrograph – a high-precision instrument on the 3.6-m telescope at ESO’s La Silla Observatory in Chile — have revealed unexpected daily changes in the mysterious bright spots on Ceres, suggesting that the spots change under the influence of sunlight as the dwarf planet rotates. This artist’s impression shows the very bright patches of material in the crater...