1938 Death William W. Campbell, U.S. astronomer (Stellar Motions), dies at 76 1920 Event F Pease's interferometer measures 1st stellar diameter (Betelgeuse) 1910 Death William Huggins, discoverer of stellar nature of Andromeda, dies 1863 Birthday Annie Jump Cannon, U.S., stellar spectroscopist, Harvard-classification 1839 Event Thomas Henderson measures 1st stellar parallax (Alpha Centauri)
