What was the planet last to be discovered out of these?
science with planets - Dave, Tuesday, March 23, 2010 at 7:26pm
Only 3 of the 9 planets in our solar system have official "discoverers" and "times of discovery".
Uranus was discovered by Sir William Herschel in 1781.
Neptune was discovered by John Couch Adams in 1846.
Pluto was discovered by astronomer Clyde Tombaugh in 1930.