British astronomer and broadcaster Sir Patrick Moore has died, aged 89, his friends and colleagues have said.
Sir Patrick presented the BBC programme The Sky At Night for over 50 years, making him the longest-running host of the same television show ever.
He wrote dozens of books on astronomy and his research was used by the US and the Russians in their space programmes.
Described by one of his close friends as “fearlessly eccentric”, Sir Patrick was notable for his habit of wearing a monocle on screen and his idiosyncratic style.
Sir Patrick presented the first edition of The Sky at Night on 24 April 1957. He last appeared in an episode broadcast on Monday.
Sir Patrick Moore is known to Whovians for his cameo appearance (as himself) in the Eleventh Doctor’s first episode, “The Eleventh Hour.”