24-inch Alvan Clark refractor

Lowell Observatory in Flagstaff, Arizona is famous as the place where dwarf planet Pluto was discovered by Clyde Tombaugh in 1930, but it has an illustrious 121-year-old record of astronomical research and discovery. After a 20-month-long restoration project, Lowell’s historic 24-inch Alvan Clark refractor is poised to reopen for public observing sessions.