"Life on Dwarf Planet Ceres?" Mysterious Daily Changes in Bright Spots Baffle Scientists - The Daily Galaxy --Great Discoveries Channel
http://www.dailygalaxy.com/...planet-ceres-mysterious-changes-in-bright-spots-puzzle-scientists.html
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. These observations suggest that the material of the spots is volatile and evaporates in the warm glow of sunlight.