LONG Dr. Donald M. Hunten is an outstanding atmospheric and space scientist who is a world leader in the understanding of planetary atmospheres. Following graduate studies in nuclear magnetic resonance he moved to the University of Saskatchewan where he joined a group engaged in upper atmospheric studies. There he developed a major observing program for the study of alkali metals in the upper atmosphere and was an outstanding instrument builder. During his tenure in Saskatchewan he trained many of Canada's present leaders in space research. In 1963 he moved to Kitt Peak National Observatory where he continued his studies of the terrestrial atmosphere and also became interested in the atmospheres of other planets. In 1977 he moved to the Lunar and Planetary Laboratory of the University of Arizon. He was the first to determine the surface pressure on Mars. He has led much of NASA's work on planetary exploration. He was the first person to recognize the importance of the Roland and Molina work on CFCs and in 1975 even suggested that these gases should be banned. Donald Hunten's outstanding career has been recognized with many awards, possibly the most distinguished being the COSPAR Space Science prize. Although officially retired he continues to provide unparalleled guidance to the next generation of international space scientists. SHORT Donald M. Hunten is an outstanding atmospheric and space scientist who is a world leader in the understanding of planetary atmospheres. He developed a major observing program for the study of alkali metals in the upper atmosphere and trained many of Canada's present leaders in space research. He became the first to determine the surface pressure on Mars. He has led much of NASA's work on planetary exploration.