Since its 1930 discovery, Pluto has traveled only a third of the way around the Sun. But Sedna takes 11,000 years Posted on 2022/03/11 by Carl Robitaille Since its 1930 discovery, Pluto has traveled only a third of the way around the Sun. But Sedna takes 11,000 years. pic.twitter.com/gmAUwQRqGN— Andrew Rader (@marsrader) February 28, 2022