That would be American astronomer Clyde Tombaugh a twenty four year old from Kansas who used a technique where he "Blinked" two pictures of the sky until he discoved a body that moved over the two hour difference. It was found on February 18, 1930. More can be found here: http://library.thinkquest.org/28327/HTML/universe/solar_system/planets/Pluto/exploration/discovery_of_pluto.HTML
Clyde Tombaugh in 1930.
Well first of all, Pluto is very small like a star. Plus it is far away and cold and you have to be close enough or be on Pluto to see it.
see 'why was Pluto removed from the planetary system? '
If you count Pluto, the answer is PLUTO.
Pluto was never visited.
Pluto was first observed by the astronomer Percival Lowell.
Pluto is a dwarf planet, not a star. See related questions,
Disney's Pluto was first seen in "The Chain Gang" 1930 .
Pluto was discovered in 1930 by a lucky accident. It was predicted mathematically that there was a planet beyond Neptune. Not knowing this, Clyde W. Tombaugh at Lowell Observatory in Arizona did a very careful sky survey which turned up Pluto anyway.
by telloscope
no
No one has visited Pluto yet.