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The easy answer is gravity. The pull of a star's gravity keeps the planets in orbit in almost equal amounts of centripetal force pulls them away.
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Another contributor clarified:
The answer is 'gravity'. The more massive the body, the more gravity it has.
"Centripetal force" is any force that pulls awayof the path, such as swinging around a weight attached to a string. The faster you spin it, the heavier it seems to become.
What else can I help you with?
What prevent's a planets moon from flying off into space?
Gravity.
Would you fall off of Uranus?
No, like all planets (and most moons), uranus has enough gravity to prevent things from flying off into space.
What does gravity give a planet?
With out gravity planets would go flying off into space
What are the roles of gravity in your solar system?
Gravity locks the planets into orbits, keeping them from flying off into space and permitting humans to remain on the face of the planet.
Why does everything inside of a galaxy remain in place instead of flying off into space?
Well, to tell the truth, everything inside a galaxy is actually flying off in space. Everything that is anything is flying off in space. Space is the thing that everything is in. What does tend to keep things together is gravity. So as things inside a galaxy are flying around in space, gravity keeps them from flying off in their own direction.
What date did Isaac Newton invent gravity?
He needed gravity because he had ideas about motion. He believed gravity caused planets to revolve around the sun instead of flying off into space.
Why can planets and moons be seen?
Planets and moons can be seen because of the light that shines off of them in space.
What holds the planets in their orbits?
Planets are held in their orbits by the gravitational force exerted by the sun. This force is what allows planets to stay in motion around the sun without flying off into space or falling into the sun.
What prevents gases flying off onto space?
gravity.
What makes the planets move?
The planets move in their orbits around the sun due to a combination of momentum from their initial formation and the gravitational pull of the sun. This gravitational attraction keeps them in motion and prevents them from flying off into space.
Why do planets not thrown off into the outer space?
because they have a gravitational pull
What keeps the plates from flying off into outer space?
The force of Gravity.
