... Green ESO . ... Observations made using the HARPS spectrograph at ESOтАЩs La Silla Observatory in Chile have revealed unexpected changes in the bright spots on the dwarf planet Ceres. Although Ceres appears as little more than a point of light from the Earth, very careful study of its light shows not only the changes expected as Ceres rotates, but also that the spots brighten during the day and also show other variations. ... ArtistтАЩs view of bright spots on Ceres imaged by the Dawn spacecraft . ...