Sir Patrick Alfred Caldwell-Moore, CBE, FRS, FRAS (4th March 1923 - 9th December 2012) was an English amateur astronomer who attained prominent status in that field as a writer, researcher, radio commentator and television presenter. Moore was a former president of the British Astronomical Association, co-founder and former president of the Society for Popular Astronomy (SPA), author of over 70 books on astronomy, and presenter of the world's longest-running television series with the same original presenter, The Sky at Night on the BBC. As an amateur astronomer, he became known as a specialist on observing the Moon and creating the Caldwell catalogue. Idiosyncrasies such as his rapid diction and monocle made him a popular and instantly recognisable figure on British television.