What balances the sun's great gravitational pull?

Answer 1

No. Because any changes in gravity will affect both sides of the balance equally, it requires no calibration for changes in gravity. Obviously, in zero g it wouldn't work, but theortically it could work in micro-gravity.

Answer 2

The point of the question isn't clear. Why must there be a force to 'balance' the

gravitational attraction of the Earth toward the sun ?

If you're concerned about identifying Newton's 'Action -- Reaction' in this particular

situation, that's easy, when you remember that gravitation always works both ways.

The Earth attracts the sun with a force that's exactly equal to the force with which

the sun attracts the Earth.

The whole set-up is what keeps the Earth in orbit. Virtually all of the gravitational

force acting on the Earth is due to the sun. If there were other forces to 'balance' it,

then our planet would stop orbiting, and sail off in a straight line.

Answer 3

If this question means "Why don't we fall right through the ground to the center of the Earth", then the answer is the electromagnetic force.

Answer 4

it is a kind of composition is the complete adaptaion to its suroundings.