The IUE (International Ultraviolet Explorer) satellite was an orbiting astronomical observatory for ultraviolet spectroscopy between 115 and 325 nanometers. It was a joint venture between NASA, the United Kingdom, and ESA (European Space Agency). Objects of study ranged from Halleys comet and planets in the solar system to hot stars, supernova 1987A, and active galaxies powered by supermassive black holes.
