Patrick Moore talks to the world's leading comet experts about the fallout from NASA's impactor probe, Deep Impact, to the comet 9P/Tempel-1. Chris Lintott reports from the Palomar Observatory.
Dr Chris Lintott advises on how best to see Saturn, whilst Sir Patrick Moore finds out the latest from the Cassini mission which is currently orbiting Saturn.
Patrick Moore takes a tour of the winter sky, looking at twinkling 'variable stars' with Dr John Mason and at planets and galaxies with Pete Lawrence and Paul Abel.
Sir Patrick Moore charts the development of the telescope over four centuries and fasts forward to meet the astronaut who repaired the Hubble Space Telescope. Dr Chris Lintott visits some modern day astronomical leviathans.
Sir Patrick Moore talks about the latest news from Messenger, the spacecraft over Mercury. Dr. Chris Lintott looks at the legacy of the last moon mission, Apollo 17.
Chris Lintott visits the Johnson Space Centre to talk to the Commander of Apollo 17, Eugene Cernan about his memories of being the last man on the Moon in 1972.
Patrick Moore discusses the possibility of life on other planets with Professor Monica Gardy and Professor Simon Conway Morris. Chris Lintott spends a night meteor-watching.
Patrick Moore commemorates the show's 50th anniversary by traveling back in time to the filming of the first episode in April 1957, then goes forward to 2057 to witness the 100th anniversary.