Question

proportionally how do the gravity of the sun and the moon affect the earth? How much each?

Answer 1

Gravity is the force (or pull) that a planet, or object, is drawn towards another object

Newton’s theory to find the force of gravity

• That formula is : F=G M m / r^2

Gravity provides the necessary centripetal acceleration needed to keep the earth in its orbit around the sun and the moon in its orbit around the earth.

An important effect of the combination of gravity of sun and moon on earth is the tidal gravity.

Sun Gravity

Gravity is greater on the sun than it is on Earth because the sun is more massive than the Earth The earth stays in orbit around the sun by the sun's gravitational force.

Isaac Newton found out that the strength of the pull of gravity weakens the farther you get away from an object, in proportion to 1/(r*r), where r is the distance you are away from the center. The strength of the gravitational pull is also proportional to the mass of the object.

The sun is really massive and really big. It has a mass of about 2 times ten raised to the thirtieth power kilograms. (that's 2000000000000000000000000000000 kg), and a radius of about 700000 kilometers. This makes the strength of gravity on the "surface" of the sun 28 times stronger than the force of gravity on the surface of the Earth.

at the distance we orbit the sun, the gravitational pull of the sun is only 0.0006 of the strength of the earth's gravity on the surface of the earth. But that's enough to pull the entire planet around in a big, nearly circular orbit, once per year.

the variation in the strength of the sun's gravitational pull from the part of the earth that faces towards the sun to the part that faces away is partly responsible for the tides of the ocean.

The moon impacts the Earth's tidal patterns

Tides are one of the more observable results of the moon's gravitational pull

There could be a correlation between movement of water within the plant’s leaves and the lunisolar tide cycles, in a movement referred to as "leaftide."

The moon's gravitational pull slows down the Earth’s rotation, in a phenomenon known as "tidal braking" at a rate of 2.3 milliseconds each century,

The Earth causes "lunar body tide," which creates "bulges" on the surface of the moon, one on the Earth-facing side, and a matching lump on the far side. Earth's gravitational pull is so powerful that it creates a small bulge on the surface of the moon.

In space, the closest object to Earth is the Moon.

1.The lowest (neap) tides occur when the Sun and the Moon pull at right angles to each other and their pulls partly cancel each other out.

2.When the Sun and Moon line up in space, their gravities combine and create the highest spring tides.

The gravity on the Moon is about 17% what it is on the Earth. So if you weigh 200 pounds on Earth, you will weigh 34 pounds on the Moon

Earth’s gravity is 9.807 m/s², compared to the moon’s gravity of 1.62 m/s² or just 17 percent of Earth’s gravity.