The Hubble Telescope has revolutionised our understanding of the Universe. It has, among many other achievements, revealed thousands of galaxies in what seemed to be empty patches of sky and measured precisely how fast the universe is expanding.
In this talk, the first American woman to walk in space, Kathryn D Sullivan, recounts how the team of astronauts, engineers and flight controllers helped launch, rescue and maintain Hubble, the most productive observatory ever built. Her book, 'Handprints on Hubble: An Astronaut's Story of Invention' is available now.