The Sky at Night — Episode 11: Mapping The Universe

You are watching the episode Mapping The Universe Man is scanning the night sky and counting stars, galaxies and other solar bodies. Patrick Moore discusses two of the most comprehensive surveys - 2dF and the Sloan Digital Sky Survey - and asks what they tells us about our Universe. Chris Lintott visits the Palomar Observatory in Southern California. Patrck also ventgures into his gardne to look at the Perseids.