In this image, taken January 13, 2015, NASA's Dawn spacecraft captures the dwarf planet Ceres in both visible and infrared light. The infrared image, right, serves as a temperature map of Ceres, where white is warmer and red is colder.
This map from NASA's Dawn mission indicates the presence of hydrated minerals on the giant asteroid Vesta about 30 degrees north latitude, in August 2011. At the time, it was winter in Vesta's northern hemisphere.
This colorized map from NASA's Dawn mission shows the distribution of minerals across the surface of the giant asteroid Vesta. It was made from spectra -- or data collected in different wavelengths of radiation.