The International Ultraviolet Explorer (IUE) geosynchronous satellite, launched in 1978, was the creation of diverse interests in Europe (European Space Agency), the United Kingdom (Scientific & Engineering Research Council), and the National Aeronautics and Space Administration's (NASA) Goddard Space Flight Center. It was, until the launch of the Hubble Space Telescope in April 1990, the only astronomical telescope working in orbit. Many notable discoveries emerged from the IUE, including the detection of sulfur in the nucleus of a comet, the observation of a massive hot halo of gas surrounding our galaxy, and the continuous monitoring of Supernova 1987A. Scientists discuss the creation, design, manufacture, administration, and use of the IUE. . DeVorkin documented the IUE image processing lab and control center, recorded an observing session with a guest astronomer, where data was collected and discussed, and examined specific pieces of equipment that formed the IUE. His general interest was in observational techniques and the effect of new technologies on astronomical data gathering. Key participants were Carol Ambruster, Albert Boggess, Yoji Kondo, and George Sonneborn. Charles Loomis, Lloyd Rawley, and Mario Perez assisted during the observing session.