The distance from the center of the earth to the North Pole or South Pole is about 3950 miles (6356.9088 kilometers) (the difference between the two poles is negligible).

The equatorial radius of the earth is about 6378. 137 km, the polar radius is about 6356.752 km, and the average radius is about 637 1 km. Radius of the earth refers to the distance from the center of the earth to its surface. The earth is an irregular object. It is not a right sphere, but an ellipsoid, or an oblate sphere with slightly flat poles and slightly protruding equator. Secondly, the South Pole and the North Pole of the Earth are also asymmetrical.

The earth is the third planet in the solar system from the inside out, and the earth-like planet with the largest mass, diameter and density in the solar system. The earth rotates from west to east and around the sun. The surface area of the earth is 5 1 10,000 square kilometers, of which 29% is land and the rest is ocean. Seen from outer space, the earth is generally blue.

earth

The name of the earth comes from the understanding of the shape of the earth, which can be traced back to the name and concept of the earth put forward by Aristotle, an ancient Greek scholar, and comes from the philosophical perfection and mathematical balance of the sphere. Westerners often call the earth Gaia, which means "God of the earth" and "Mother of the gods". The earth is the third planet in the solar system from the inside out, and the earth-like planet with the largest diameter, mass and density in the solar system. Humans living on the earth often call the earth the world.