The mission of Lowell Observatory is to pursue the study of astronomy, especially the study of our solar system and its evolution; to conduct pure research in astronomical phenomena; and to maintain quality public education and outreach programs to bring the results of astronomical research to the public. Founded in 1894, the Observatory has been the site of many important findings including the discovery of the large recessional velocities (redshift) of galaxies by Vesto Slipper in 1912-1914, and the discovery of Pluto by Clyde Tombaugh in 1930. Today, Lowell's 20 astronomers use ground-based telescopes around the world, telescopes in space, and NASA planetary spacecraft to conduct research in diverse areas of astronomy and planetary science. The Observatory welcomes more than 75,000 visitors each year for tours, telescope viewing, and special programs.