The goal of my research has been to understand the general circulations of planetary atmospheres, starting with Venus, then Jupiter. Understanding the observed differences of circulations required determining the influences of various types of clouds. As available planetary observations were incomplete and very infrequent, I moved to study the role of clouds in Earth's atmospheric circulation where much more satellite information was becoming available. My career has been developing these satellite cloud measurements and diagnosing the behavior and effects of clouds on weather and climate.