Charles Piazzi Smyth (3 January 1819 – 21 February 1900) was a British astronomer who was Astronomer Royal for Scotland from 1846 to 1888; he is known for many innovations in astronomy and, along with his wife Jessica Duncan Piazzi Smyth, his pyramidological and metrological studies of the Great Pyramid of Giza. == Astronomical career == Charles Piazzi Smyth (pronounced ) was born in Naples, Kingdom of the Two Sicilies, to Captain (later Admiral) William Henry Smyth and his wife the former El…