Pluto has not completed a single orbit around the sun since its discovery in 1930, and it will not complete its first observed revolution until the year 2178.

A closer look

Pluto has not completed a single orbit around the sun since its discovery in 1930, and it will not complete its first observed revolution until the year 2178. Because it is located so incredibly far out in the dark fringes of the solar system, one Plutonian year equates to about two hundred and forty-eight Earth years. In the brief time humanity has known about its existence, we discovered it, named it, demoted it to a dwarf planet, and endlessly debated its status, all while it hasn't even made it halfway through its own calendar year. The cosmic iceball is the ultimate victim of human indecision, getting canceled by astronomers before it could even celebrate a single birthday. Honestly, it is probably better off distancing itself from Earthly drama anyway, sitting alone in the Kuiper belt ignoring the absolute mess we have made of our own neighborhood