2006
The longest year on any planet that circles around our sun is on Pluto, which one year on Pluto roughly is 248 Earth years. <><><><><> Since Pluto is no longer considered to be a planet, the role of longest year falls to Neptune, with 168.4 years.
Pluto.
The thinking today is that the planet Pluto is no longer a planet, but is now considered a dwarf, from the year 2006.
2008
2006
The dwarf planet Pluto was discovered in the year 1930. It was discovered by Clyde Tombaugh and is the largest object found in the Kuiper belt.
According to the new definition, in the year 2006, a fully fledged planet is an object that orbits the Sun and is large enough to have become round due to the force of its own gravity. In addition, a planet has to dominate the neighborhood around its orbit. Pluto was demoted to a "dwarf planet" because it does not dominate its neighborhood. Pluto now seems to be just one of many objects in the fairly recently discovered "Kuiper belt". Charon, Pluto's largest moon, is only about half the size of Pluto, while all the true planets are far larger than their moons. Astronomers took a vote in 2006 and Pluto was demoted to a dwarf planet.
The dwarf planet Pluto is the planet with a year 248 earth years long.
Pluto the 10th planet was discovered
2006
2006
Originally, he was named Rover. About a year after the naming of the former planet, they decided to switch the name to Pluto.