What effect do the other plants orbiting the sun have on Earth?

Question

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Answer 1

Not much directly. In my planetary physics class we once had to calculate the affect of the gravity of Jupiter on the earth's tides. It turned out to be only about 1 inch.
Indirectly, the other planets have a little more affect. The gravity of Jupiter, Saturn , Neptune and Uranus are more likely to perturb or def elect rogue comets and asteroids into the inner solar system where we will pass through comet trails (meteor showers) or be in danger of collisions.

Answer 2

I am yet to see plants orbiting the sun.

OH, you mean PLANETS?

It is the centrifugal force of the sun - like swirling the stone at the end of a string. The weight of the stone keeps the string taught. The same way, several planets are being 'swirled' by the sun with its centrifugal force (gavity - the force away from centre) and at the end of this 'string' are the planets. It is amazing that the stones (planets) in themselves do not collide with each other because they, in turn, have centripetal force (force towards the centre) to keep themselves apart.

Nature is wonderful. They follow a certain law. There is so much to marvel about our universe.

At least these are things we know.
There are many things we still do not know.

Answer 3

The major effect of the other planets is in the small perturbations their gravity has on the orbit of the earth. These perturbations cause cyclical changes in the eccentricity of Earth's orbit, which in turn causes ice ages and inter-glacial periods.

Answer 4

It is a delicate balance actually,with Saturn and Jupiter acting as 'bodygaurds' for planet Earth.Sheilding it from the biggest asteroinds and meteors.