The Sky at Night — Episode 5: Exploring the Ultraviolet Sky

You are watching the episode Exploring the Ultraviolet Sky The IUE or International Ultraviolet Explorer satellite was launched in 1978. It had an estimated lifespan of three years, but it is still operating and has revolutionised our whole understanding of the stars. In this month's Sky at Night, Patrick Moore is joined by Professor Robert Wilson , who has been the prime mover in the IUE experiment.