They say that behind every successful man there's a woman. The woman behind the success of astronomer Patrick Moore - whose The Sky at Night series is the longest running one-man show on television - is his mother, 86-year-old Gertrude.
When he was six she gave him a book called The Story of the Solar System. He's been looking up at the sky ever since - and making a good living out of it.
Tonight she talks to John Pitman about how it all began.