Sir Patrick Alfred Caldwell-Moore (; 4 March 1923 – 9 December 2012) was an English amateur astronomer who attained prominence in that field as a writer, researcher, radio commentator and television presenter. Moore's early interest in astronomy led him to join the British Astronomical Association at the age of 11. He served in the Royal Air Force during World War II and briefly taught before publishing his first book on lunar observation in 1953. Renowned for his expertise in Moon observation and the creation of the Caldwell catalogue, Moore authored more than seventy astronomy books. He hosted the world's longest-running television series with the original presenter, BBC's The Sky at Night, from 1957 until his death in 2012. Idiosyncrasies such as his rapid diction and monocle made him a popular and instantly recognisable figure on British television. Moore was co-founder and president of the Society for Popular Astronomy. Outside his field of astronomy, Moore appeared in the video game television show GamesMaster. Moore was also a self-taught xylophonist and pianist, as well as an accomplished composer. He was an amateur cricketer, golfer and chess player. In addition to many popular science books, he wrote numerous works of fiction. He was an opponent of fox hunting, an outspoken critic of the European Union and a supporter of the UK Independence Party, and he served as chairman of the short-lived anti-immigration United Country Party. He was knighted in 2001.