Saturn's mysterious moon Enceladus has startled astronomers with its amazing ice geysers, which spew out material into space. Sir Patrick Moore talks to the scientists who are trying to unlock the secrets of this tiny world.

Dr Chris Lintott visits the Open University to find out the latest on our own Moon. He meets scientists from the Japanese Kaguya mission and the Indian Chandrayaan mission, with its British instrument CIXS.

Every day, asteroids whizz past the Earth on their journey through space. Sir Patrick Moore discusses the chances of a close encounter with an asteroid, after telescopes recently got a unique view of an asteroid disintegrating in our atmosphere.