# What forces keep the planets in their orbits?

## What forces keep the planets in their orbits?

First, gravity is the force that pulls us to the surface of the Earth, keeps the planets in orbit around the Sun and causes the formation of planets, stars and galaxies.

## What keeps a planet together?

The gravity of the sun and the planets works together with the inertia to create the orbits and keep them consistent. The gravity pulls the sun and the planets together, while keeping them apart. The inertia provides the tendency to maintain speed and keep moving.

What factors affect the planets orbits?

A planet’s orbital speed changes, depending on how far it is from the Sun. The closer a planet is to the Sun, the stronger the Sun’s gravitational pull on it, and the faster the planet moves. The farther it is from the Sun, the weaker the Sun’s gravitational pull, and the slower it moves in its orbit.

### Why do bodies move in circular orbit?

Explanation of how objects under the influence of gravity move in orbits. A body in uniform circular motion undergoes at all times a centripetal acceleration given by equation (40). According to Newton’s second law, a force is required to produce this acceleration.

### What is known as a dirty snowball?

Comets are several miles in diameter, composed of rock, ice and other organic compounds, making them “dirty snowballs” in space, according to NASA’s near earth object program. They originate outside the orbit of the outermost planets and form elliptical orbits that pass close to the sun.

What planet is no longer?

Answer. The International Astronomical Union (IAU) downgraded the status of Pluto to that of a dwarf planet because it did not meet the three criteria the IAU uses to define a full-sized planet. Essentially Pluto meets all the criteria except one—it “has not cleared its neighboring region of other objects.”

#### What would happen if planets collided?

If the cores collide at an angle then the planets may or may not merge, but in all cases a large amount of the gaseous envelope will be lost. Very oblique collisions do not disrupt the planets at all and both would continue on almost the same orbits without losing any mass.

#### What is the most powerful force in the universe?

The strong nuclear force
The strong nuclear force, also called the strong nuclear interaction, is the strongest of the four fundamental forces of nature. It’s 6 thousand trillion trillion trillion (that’s 39 zeroes after 6!) times stronger than the force of gravity, according to the HyperPhysics website.

What forces are acting on the moon to keep it in orbit?

The Earth’s gravity keeps the Moon orbiting us. It keeps changing the direction of the Moon’s velocity. This means gravity makes the Moon accelerate all the time, even though its speed remains constant.