Joining us this month is Chris Lintott, a Professor of Astrophysics at Oxford University but known to millions as a current presenter on the BBC's The Sky At Night, a show which has been on our screens ever since 1957!

He co-authored Bang! – The Complete History of the Universe and The Cosmic Tourist with Sir Patrick Moore and Queen guitarist and astrophysicist Brian May. A book which has had a recent revision having been published originally in 2006.

He's also co founder of Galaxy Zoo, an online crowdsourcing project where members of the public can volunteer their time to assist in classifying over a million galaxies.

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