Who Discovered the Nine Planets?

All different people discovered the planets. In fact, according to NASA, just 3 planets have been discovered because the other 6 were always visible to everyone on earth. The 3 that have discoverers are: Uranus (Sir William Herschel in 1781), Neptune (John Couch in 1846) and Pluto (Clyde Tombaugh in 1930). For more information look here: