The suns gravitational pull.
They are all orbiting the Sun, therefor all in the Suns gravitational pull.
The Suns gravitational pull.
When the pull is stronger, they move quicker.
When the pull is stronger, they move quicker.
The suns gravitational pull forces them to move in one direction
All the planets in the solar system are kept in orbit by the gravitational pull of the sun. The effect of the other planets and other bodies in the solar system is to change the shape of the orbits slightly but the sun is what keeps them in orbit around the sun.
Because the suns gravitational pull stops them from zooming off.
It was Nicholas Copernicus. who discovered that the sun keeps the planets one Their orbit.
the suns gravitational pull pulls them toward it but the planets try to escape its gravity
I think this is called the Heliocentric Theory and was first discovered by Copernicus.
The suns gravitational pull keeps all the planets revolving around it. Without it, all the planets would go flying off into who knows where (including Earth) and the planets would of course crash into other objects and everything and everyone on Earth would die.