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They are held by the gravitational pull of the sun. All the planets and things like asteroids and comets are all within the influence of the sun's gravity.
Additional answer
But the reason they go on moving is that there is nothing to stop them. On Earth things stop moving because of friction, but in space there is no friction so, according to Newton's 1st Law of Motion which says that a body will continue in its state of motion unless acted on by an external force, the planets just go on.
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Who believed that forces keep moons orbiting planets and planets orbiting the sun?
Newton- he created the law of universal gravitation, which states that all objects in the universe have gravity.
Why do the 8 planets keep orbiting the sun?
The sun's gravity keeps them in orbit and prevents them from flying off into space. The planets travel quickly enough that they do not fall into the sun.
Is our sun the only star that has planets orbiting around it?
No. Other stars have been found to have planets orbiting them.
The earths gravity keeps the planets circling the sun?
The Sun's gravity keeps the planets orbiting the Sun.
Why is ganymede not a planet?
Because Ganymede is orbiting Jupiter whereas planets are orbiting the sun
Does gravity keep the planets orbiting the sun?
Yes.
What helps keep the planets orbiting the sun?
Gravity and Inertia
What makes the planets orbit around the sun?
The gravitational pull between the planets and the sun keep the planets orbiting the sun all day everyday.
Where does force needed to keep planets orbiting the sun come from?
The force is provided by the Sun's gravitational attraction.
Who believed that forces keep moons orbiting planets and planets orbiting the sun?
Newton- he created the law of universal gravitation, which states that all objects in the universe have gravity.
Why do the 8 planets keep orbiting the sun?
The sun's gravity keeps them in orbit and prevents them from flying off into space. The planets travel quickly enough that they do not fall into the sun.
Where are the planets found?
Orbiting stars. We know of eight planets orbiting our Sun, and we know of over 300 planets orbiting other stars.
What happens if the planets stop orbiting the sun?
The planets will fall into the sun and get destroyed.
What happens if the planets stops orbiting the sun?
The planets will fall into the sun and get destroyed.
Is our sun the only star that has planets orbiting around it?
No. Other stars have been found to have planets orbiting them.
The earths gravity keeps the planets circling the sun?
The Sun's gravity keeps the planets orbiting the Sun.
8 of these orbit the sun?
There are 8 planets orbiting the sun.
