Video: 'Reflections on Clyde Tombaugh'
(Tuesday, February 18, 1930) — Dwarf planet Pluto was discovered today by astronomer Clyde Tombaugh at Lowell Observatory in Flagstaff, Arizona. Continue reading Dwarf planet Pluto discovered by astronomer Clyde Tombaugh 90 years ago #OnThisDay #OTD (Feb 18 1930)
