Are all the planets travelling around the sun at the same speed ? and what is their speed(s)?

Answer 1

No, the planets closer to the Sun are orbiting faster, as a result of Kepler's third law of planetary motion.

Mercury: 47 km/s
Venus: 35 km/s
Earth: 30 km/s
Mars: 24 km/s
Jupiter: 13 km/s
Saturn: 10 km/s
Uranus: 7 km/s
Neptune: 5 km/s

Answer 2

What is happening in solar system motion of planets is that all planets revolve araound a center of mass between them and the Sun. And they all Revolve relative to that fulcrum except the fulcrum is not static it experience a 3 dimensional motion forming a virtual surface and its on that surface that it moves.
Since the planets have different masses they do not orbit the sun at the same speed.The movement of the planets is in continuous equilibrium with the sun's motion.
The speed of the planet has been observed by astronomy and are plotted in the astronomy tables.However the changes in speed are very small.

Answer 3

Kepler's 3rd law says the square of the orbital period P is proportional to the cube of the avg distance A from the sun. If P is in years and A is in astronomical units:

P^2 = A^3

The equation shows that as A goes up, P must go up faster. So if you double the distance A from the sun, the orbital period will increase by a factor of sq rt (2^3) = 2.83.

Since the linear velocity varies directly with A and inversely with P, the linear velocity goes down as we move out from the sun.

Answer 4

The law of orbiting bodies, dictates that you have to travel faster to stay in orbit, the closer you are to the gravitational parent.

That goes for artificial satellites. The ISS goes around in little over an hour and is a few hundred miles up. Then there are geosynchonous satellites at about 22,000 miles where all they need to do is orbit in the same time that the Earth rotates - 24 hours. So, in effect they stay positioned over one part of the Earth, and are used for bouncing communications off.

Answer 5

No they are not. However further planets travel longer distances in the same amount of time than closer planets (because it's a elliptic orbit).

There's a table of speeds right there: http://www.grandpapencil.com/projects/plansped.htm

Answer 6

No, the greater distant planets return and forth greater slowly. curiously, maximum stars return and forth on the comparable velocity around the midsection of the Milky way, autonomous of their distance from the midsection.