"Inertia" plus gravity (of the sun).
Note that the orbits do change over time, but that in the last few billion years they have been quite stable.
Because of their momentum and the mutual gravitation between them and the sun.
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Mars does not revolve around any planets, it is a planet in its own right. If it did, it would be called a moon. It orbits the sun directly.
Kepler
Planets orbit stars. Our planet (earth) orbits a star we call the sun.
Yes, they revolve around the sun in their orbits. Their orbits depend on their weight, which would determine the weight of gravity in individual cases, and the planets are controlled by their own gravity and the centrifugal and centriputal forces always in effect.
galelio
They have their own orbits, around the star they formed around, just like how our planet orbits our sun.
because of the gravity the sun has and also the planets have gravity turning around the sun
The planets orbits are the routes or paths that the planets follow around our sun. One orbit is one trip around the sun (one year).
Planetary orbits are eliptical, that is they are shaped as elipses. All planets revolve around the sun anti-clockwise as viewed from Earth's north pole.
Planets revolve around the Sun. The Sun does not revolve or rotate around the planets. Planetary orbits are best described as an ellipse. Revolving is when the planet goes around the Sun. Rotating is when the planet spins on its own axis. The Earth does one revolution in 365 days but one rotation in 24 hours.
Yes, like all of the planets in our solar system Neptune orbits the Sun.