The planets have a tangential velocity, they are speeding along sideways relative to the sun. If there was no gravity, this velocity would take the planets away from the sun, but the sun has a huge gravitational force which counteracts this effect. The suns gravitational force attracts the planets in, against this tangential velocity. If the planets were to gradually slow down, then they would eventually spiral into the sun, but in space there is no drag, so the planets maintain their speed and their orbits.
They keep running away from each other.
to keep gravity going
Gravity and inertia
That's "centrifugal force". It's not a "real" force like gravity, but is a convenient way of describing the effect of the inertia of the planets. (The planets would move in straight lines if they were not in a gravity field.)
The two factors that keep planets in orbit are gravity and the forward motion they gained during their formation. Gravity pulls the planet towards the sun, but the forward motion prevents the planet from falling into the sun, leading to a stable orbit.
Yes, it is about 1/3 that on Earth.
then all of the planets will just fly away in space they will just keep on flying.
The sun has a large mass of gravity. And the sun uses that gravity to keep us from flying away. Even though we try to, the sun keeps us in balance. All the movement on the planets move the planets farther away if we didn't have the suns gravity. And because there is no friction in space we keep on moving around very slow. But the farther away the planet is. The slower it goes around.
yes
To keep us from floating in to space.
They keep running away from each other.
The two forces that work together to keep the planets in orbit around the sun are gravity and inertia.
Gravity helps to keep the planets in orbit. It also helps to keep the moon's close to the planets.
Gravity and inertia
Yes.
to keep gravity going
Gravity. It's the weakest of the 4 fundamental forces in our universe, but still the force responsible for holding it together. String theorists suggests explains that gravity leaks down from a stronger force in higher dimensions.