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Pluto
2006
Pluto is demoted to a 'dwarf planet'
1999
Pluto again becomes outermost planet
1997
Clyde Tombaugh, astronomer, discovered Pluto in 1930, dies at 90
1996
1st surface photos of Pluto by Hubble Space Telescope
1979
Neptune becomes outermost planet (Pluto moves closer)
1978
James Christy's discovery of Pluto's moon Charon announced
1967
Pinto Colvig, animation voice (Goofy, Pluto), dies at 75
1944
Pipeline under ocean (Pluto) begins operating
1938
William H Pickering, astronomer (predicted Pluto), dies at 79
1930
Planet Pluto named
1930
Clyde Tombaugh announces discovery of Pluto at Lowell Observatory
1930
U.S. astronomer Clyde Tombaugh discovers Pluto
1930
Clyde Tombaugh photographs planet Pluto
1915
Pluto photographed for 1st time (although unknown at the time)
1906
Clyde William Tombaugh, U.S., astronomer, discovered Pluto
1892
Pinto Colvig, OR, animation voice, Goofy, Pluto
1855
Percival "Percy" Lowell, U.S. astronomer, predicted discovery of Pluto
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