Don Hunten was a major contributor to the unmanned space program. He was very involved in the planning and implementation of many of the NASA planetary missions including Pioneer, Venus, Voyager, Galileo and Cassini.The bulk of this collection consists of 25 notebooks. The majority are related to his career as an astronomical researcher at the University Saskatchewan, Kitt Peak Observatory and the University of Arizona. Other items in the collection are correspondence, photographs, computer disks and CD’s.