Patrick Moore discusses what Herschel, Europe's biggest and most expensive space satellite, will do once it begins its infrared exploration of the universe.

Dr Chris Lintott gets a rare chance to see the Herschel mirror, which at 3.5 metres will be the biggest astronomical mirror ever to be sent into space.

Containing trillions of stars, Andromeda is the largest galaxy in our neighbourhood. It is 2.5 million light years away, yet is still visible to the naked eye. Sir Patrick Moore and his guests unravel some of the mysteries in the star systems that surround us and look at the latest discoveries from our local galaxies.