The farthest one is the slowest - Neptune
Neptune
The closest one goes the quickest - Mercury.
Orbital velocity refers to the speed at which a planet travels in its orbit.
The Earth travels at about 66000 miles per hour around the sun, much faster than the speed of sound which is about 750 miles per hour. Even as the Earth rotates, a point on the equator travels at a little over 1000 miles per hour so parts of the planet are faster than the speed of sound even without the orbit around the sun.
According to Kepler's Third Law, the planets that are nearer to the Sun movefaster than the planets that are farther away. The closest planet - and thus thefastest - is Mercury; the farthest planet from the Sun is Neptune.==================================The way gravity works guarantees, that the closer an object is to the sun, the faster it moves, whether the orbit is almost circular or highly eccentric. This simplerule instantly lines up the speeds of the various solar system objects for us:Fastest speed:Comets which, at their closest approach, spend part of their time inside the orbit of Mercury.Their speed is highest when they're closest to the sun.Known planet with the highest average speed:The planet nearest the sun . . . Mercury.Known planet with the lowest average speed:The planet farthest from the sun . . . Neptune.Known dwarf-planet-like objects with the lowest average speed:Known objects farthest from the sun . . . Pluto, Eris.
Neptune
The velocity a planet travels in it's circle around the Sun
The closest one goes the quickest - Mercury.
Orbital velocity refers to the speed at which a planet travels in its orbit.
A satellite in a closed orbit has the greatest speed when it's closest to the planet, and the lowest speed when it's farthest from the planet.
The orbital speed of the Earth around the Sun averages about 108,000 km/h. The planet travels a total of 940 million kilometers in one revolution.
The orbital speed of a planet is the time it takes to cycle around the sun. The spinning speed of a planet is the time it takes for the planet to rotate on it's axis.
Sedna.
The Earth travels at about 66000 miles per hour around the sun, much faster than the speed of sound which is about 750 miles per hour. Even as the Earth rotates, a point on the equator travels at a little over 1000 miles per hour so parts of the planet are faster than the speed of sound even without the orbit around the sun.
Mercury is the fastest planet in our solar system. It takes just 88 days to orbit around the sun at speeds of 50km per second.
Pluto is the slowest planet to move around the sun, because of its far distance.
Orbital speed is the velocity (speed) of an object as it travels an orbital path around a reference point.