Stargazing Live: Back to Earth

Episode 1 (4x1)

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After an hour's Stargazing at Jodrell Bank, Dara O Briain and Brian Cox return to answer questions with the help of special guests including legendary Apollo 11 astronaut Buzz Aldrin. Plus Dr Lucie Green needs viewers' help to complete one of the toughest tasks in astronomy - the daunting Messier Challenge.