... Tonight's Sky . ... Mars . ... Observing . ... Mapping ice on Mars . The Thermal Emission Imaging System improves scientists' understanding of Mars' water cycle. ... False colors in this map, made using THEMIS temperature measurements, show how deep ice lies underground. ... We find the top layer of soil has a huge effect on the water ice in the ground," says Joshua Bandfield, a research specialist in Arizona State University's School of Earth and Space Exploration and sole author of the paper. ...