In February 18, 1930 Pluto was discovered as a planet. Pluto remained a planet for 76 years before being demoted to a dwarf planet. The worst part is that Pluto never completed one orbit around the sun as a planet. This created controversy whether Pluto should be a planet. I Believe Pluto Is A Planet And Will Always Be A Planet!. Let's make this a reality and sign the petition to support these four words: Pluto Is A Planet!