Orbital speed is determined by the mass of the body and the distance from the sun. Given its extreme distance, Pluto has the slowest orbit. However, Pluto is no longer considered a planet, but instead a planetoid. Therefore Neptune now has the slowest orbit.
Neptune. (Pluto is no longer considered a planet, but, rather, a dwarf planet.)
Warm front
the slowest animal only moves 10 Centimetres per minute
Of the major planets, Neptune. The speed of planets in their orbits is directly related to their distance from the sun. The farther a planet is from the Sun, the slower its orbital speed.
A cold front moves the fastest, and a stationary front moves the slowest. A cold front moves about 20 mph, while a stationary front moves very little.
The farther a planet is from the sun, the slower it moves in its orbit. So the planet with the largest orbit is the slowest. That's Pluto ... if you still consider Pluto a planet ... or Neptune if you don't.
Neptune would move the slowest. The orbit speed is related to the distant the planets are to the sun. Farther the planet, slower the pace. Remember, Pluto is no longer a planet.
The planet that has the slowest orbit would be Neptune due to the fact that is is furthest away from the sun. However, if you want to count dwarf planets, then Eris would be the slowest.
If you still consider Pluto to be a planet then Pluto would be the slowest to orbit the sun. If you don't believe Pluto is a planet anymore then Neptune would be the slowest planet to orbit our sun.
At its aphelion, the point furtherest from its primary while in orbit.
Sedna.
Pluto is the slowest planet to move around the sun, because of its far distance.
Curiously, the nearer the planet is to the Sun the faster it orbits. Thus Mercury orbits the fastest, whereas Neptune is the slowest.
Neptune. (Pluto is no longer considered a planet, but, rather, a dwarf planet.)
Neptune is the furthest planet from the sun, taking the longest time to complete one orbit, 164.79 years in total. Its distance means that is has further to go to complete one orbit, while it also means that the planet travels the slowest. The further a planet is from the gravitational pull of the sun, the slower it will move tangentially.
Each planet moves in a different orbit, at a different average distance from the sun, and at a different speed.
That planet will move faster in its orbit.