S'COOL: If you're a fan of clouds, this project is for you. S'COOL is designed to provide "ground truth" observations of clouds and cloud formations. The data is correlated with overhead satellite imagery from the CERES instrument. CERES stands for Clouds and the Earth's Radiant Energy Sytem. It is now orbiting the Earth as part of NASA's Earth Science Enterprise to study the ways in which clouds may affect the Earth's climate. Sign up as a school, a classroom, or as an individual citizen scientist.