Earth.
Neptune moves more slowly than Earth. The farther a planet is from the Sun, the longer its orbit. But the lesser gravity of the Sun at longer distances means that the planets also do not need to move as rapidly in their orbits. A planet farther from the Sun moves more slowly than one closer to the Sun.
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.
Neptune
Relative to the Earth, almost all stars are moving faster than any planet is.
the earth moves faster than you or i can run the earth moves faster than the bullet from a gun
Earth moves faster in its orbit around the sun when it is closer to the sun, which happens in December. This is due to the conservation of angular momentum in the solar system, where the closer a planet is to the sun, the faster it moves in its orbit.
Mercury.
The first planet to be discovered using observed gravitational anomalies was Neptune. Its existence was predicted mathematically based on irregularities in the orbit of Uranus, which led astronomers to search for and discover Neptune in 1846.
the planet mercury (:
The outer planets are usually defined as Jupiter, Saturn, Uranus and Neptune. The innermost of those, Jupiter, moves around the sun the fastest. The speed of planet is a function the size of its orbit only -- mass doesn't matter, as figured out by Kepler about 500 years ago. Thus Mercury, the innermost of all planets, has the greatest orbital speed (87.96 Earth days for an orbit), and Neptune the slowest (164.81 Earth years). If you want to include Pluto, then it has the greatest orbital period (247.7 earth years)
The apparent backward motion of a superior planet as Earth passes it is called "retrograde motion." This phenomenon occurs due to the relative positions and movements of Earth and the other planet in their orbits around the Sun. As Earth moves faster in its orbit, it creates the illusion that the superior planet is moving backward against the background stars.
third. it goes Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune, and PlutoEarth is at a distance of about 150 million kilometers from the Sun. The direction varies, as Earth moves around the Sun.Earth is the third planet from the Sun.