How many circles are in the planet

To the human eye, circles and spheres are abundant in nature and in our universe. They can occur naturally — in planets, stars, celestial bodies, tree rings, rain drops — or they can be man-made — such as traffic roundabouts, buttons, volleyballs, pizza.

But there is a nuance to what our eyes see as a circle and what math would tell us about their true shape. Perhaps nothing appears more perfectly spherical than the gaseous ball of fire we see in the sky every day. Gravitational forces pull matter toward the center of mass, making most of the objects in the solar system, like the sun, settle on a spherical plane.

As stars, planets and moons spin on their axes, centrifugal force causes these objects to bulge at their equators, making them wider than they are tall.

The faster an object spins, the more oblate than truly spherical it becomes. The shape marks many more important gathering places used by diverse cultures as centers of worship, governance and even spectacle. Roman amphitheaters, including the Colosseum, for example, were designed as circles or ellipses to place the focus on one main event, such as gladiatorial battles.

In addition to the physical purposes they serve, circular structures have also been built to act as more abstract symbols. In Beijing, the Temple of Heaven is a conical structure that sits adjacent to a three-tiered circular marble altar used for imperial sacrifices during the Ming and Qing Dynasties. We call the extra width the equatorial bulge.

Saturn bulges the most of all the planets in our solar system. If you compare the diameter from pole to pole to the diameter along the equator, it's not the same. Saturn is Jupiter is 6. Instead of being perfectly round like marbles, they are like basketballs squished down while someone sits on them. Earth and Mars are small and don't spin around as fast as the gas giants.

They aren't perfect spheres, but they are rounder than Saturn and Jupiter. Earth is 0. Since they're not even one whole percentage point thicker in the middle, it's safe to say they're very round. As for Uranus and Neptune, they're in between.

Uranus is 2. Neptune is 1. They're not perfectly round, but they're pretty close. How do the planets stay in orbit around the sun? How did the planets get their names? How many planets in the Solar System have rings? Why are all of the planets round?

What is the order of the planets in the Solar System?