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  • Mercury - .37
  • Venus - .88
  • Earth - 1
  • Mars - .38
  • Jupiter - 2.64
  • Saturn - 1.15
  • Uranus - 1.17
  • Neptune - 1.18

Source: "The Solar System", Roman Smoluchowski, Scientific American Library, 1983, Page 164

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Why do all the planets orbit?

Planets orbit around the Sun because of the Sun's gravitational force, it makes the planets move by its gravitational force.


What holds all the planets in order?

Gravitational force is what holds all the planets in their orbits around the sun. This force is determined by the mass of the objects and the distance between them. The gravitational pull of the sun keeps the planets in their respective orbits.


What keeps all of the planets in its orbit?

The gravitational force exerted by the Sun keeps all the planets in their orbits. This force balances the planets' tendency to move in a straight line and keeps them moving in elliptical orbits around the Sun.


Why do the planets circle the sun?

Planets orbit the Sun due to the gravitational pull between them. This gravitational force keeps the planets in their elliptical paths around the Sun. It is a balance between the planets' inertia wanting to move forward and the Sun's gravitational force pulling them inward.


What is he source of the gravitational pull on the planets?

Their mass is. Gravitational force is a force between masses.


What did newton call the force that pulls all the planets towards the sun?

Gravitational Pull?


What is the gravitational force of all planets compared to earth?

Look in the link I will make below.


How does the planets mass affect the strength of gravitational force?

The greater the mass, the greater the gravitational force.


Why do all the planets orbit the sun?

Not all the planets orbit the sun - other stars have planets too. But all the planets in our solar system, which is the system of our sun, revolve around the sun; otherwise they would be in other solar systems. All the planets we can see with our naked eye orbit the sun, since the planets orbiting the sun are the only ones close enough to earth to see without a telescope.


What the gravitational pull of the sun?

That explanation is logical however the sun DOES have a gravitational force because all the planets orbit around the sun.


What keeps the planets and sun in orbit?

The question probably means "What keeps the planets in orbit around the Sun?" The answer to that is : The Sun's gravitational attraction provides the force needed to keep the planets in orbit. This force doesn't pull the planets any closer to the Sun, but it stops the planets moving away (at a tangent to their orbits) due to their own velocities.


Natural force thought to hold planets in orbit is called the what?

gravitational