He became renowned as an authority on positional astronomy and served as Astronomer Royal for 23 years .
Sir Harold Spencer Jones KBE FRS FRSE PRAS ( 29 March 1890 Kensington , London -- 3 November 1960 ) was an English astronomer .
Harold Spencer Jones became renowned as an authority on positional astronomy and served as Astronomer Royal for 23 years .
Sir Harold Spencer Jones KBE FRS FRSE PRAS ( 29 March 1890 Kensington , London -- 3 November 1960 ) was an English astronomer .