Astronaut John Grunsfeld talks about working on Hubble

John Grunsfeld is deputy director of the Space Telescope Science Institute and a former NASA astronaut. In this role, he flew on three of the five Servicing Missions, carrying out repairs and upgrades to the Hubble Space Telescope. In this video, he talks about his experiences working hundreds of kilometres above the Earth’s surface. The interview was carried out at the “Science with the Hubble Space Telescope – III” conference in Venice, Italy, in October 2010.