The volcanic mountain of Mauna Kea in Hawaii is home to some of the world's best astronomical obvervatories. At 14,000 feet, it's well above cloud level, giving astronomers the best view of the Universe they can get. Chris Lintott looks around the telescopes, whilst Patrick Moore speaks to the British Scientists who use them for their research.

With Saturn well situated in the night sky, Chris Lintott advises on what to look out for, while Patrick Moore talks to Professor John Zarnecki about the Cassini Mission.