Clyde Tombaugh didn't set out to discover Pluto when he sent his sketches of the night sky to Lowell Observatory in Flagstaff ...

While that quest is still ongoing, the observatory made history as the place where assistant Clyde Tombaugh discovered Pluto in 1930. (If you’re still not over its dwarf planet demotion ...

Pluto was discovered in 1930 by Clyde Tombaugh, an American astronomer at the Lowell Observatory in Flagstaff. Cold, dark and ...

Eventually, the work of Lowell and Pickering would pay off. On February 18, 1930, astronomer Clyde Tombaugh discovered Pluto at the Lowell Observatory. The search began in 1929, using the ...