Is the Earth round or elliptical? Whether the earth is elliptical or round

The Earth is not a standard spherical sphere, but an irregular sphere with two levels slightly flattened and slightly bulging at the equator, with an equatorial radius: kilometers.

Pole radius: km.

Average radius: 6371 km.

Equatorial circumference: 40,000 km.

Surface area: 100 million cubic kilometers.

Volume: 10,888 cubic kilometers.

The Earth is a sphere, but due to gravity, it is not a perfect sphere, and the equator bulges outwards to form a "spare tire" structure. In fact, the polar radius of the Earth is kilometers, while the radius of the equator is kilometers.

Elliptical! Because of the centrifugal force of the earth's rotation.

The radius of the equator is 7378, and the radius of the poles is 6351, in kilometers.

However, due to gravity, objects are spherical in shape, such as a mass of water, due to gravity, and automatically gather.

The Earth is neither round nor elliptical. Rather, it is a geometry that is closer to an ellipsoid. If you have to choose one, it's an ellipsoid, it's definitely not a standard sphere.

On the question of whether the earth is round or not, "Arctic Magnetic Energy: A New Understanding of the Earth" has the following insights:

At the beginning of the formation of the earth, it was not necessarily a full sphere, although the earth's crust was constantly evolving, and the strong geocentric attraction made it turn more and more round, so as to adapt to the operation in the cosmic vacuum. Due to the attraction of the North Star, the earth becomes a slightly flattened spinning top over time, which is also the charm of nature.

The evolution of the earth's crust is accompanied by the long history of the earth, always maintaining the evolution process of ups and downs, in order to maintain the appearance of the earth that is getting more and more round, the three geographical manifestations described above are opposites and unified, the first and second is the expansion of the earth's crustal area, representing the "containing" meaning of the sinking of the "seven waters", and the third is the embodiment of the northwestward moving force, representing the "horn" color of the "three mountains" floating. However, there is also floating behind the sinking, what should I do if there is too much floating? This has the alleviation of natural erosion and transportation by wind and rain, but the key is that there is room for maneuver only if there is a geocentric attraction.

It can be considered that most of the earth's crust drifted to the North Pole after the fault around Antarctica, and the pressure of the drift caused the formation of the Arctic Ocean, and the pressure of the sinking of the Arctic Ocean stimulated the geocentric attraction to form a "squeezing uplift" to the earth's crust and began a new evolutionary journey, so there are submarine seamounts formed in the ocean, and there are islands that "surfaced" from volcanic eruptions.

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The earth is an irregular sphere with two levels slightly flattened and the equator slightly bulging, and if you want to say it, it is still relatively close to an ellipse.

The ellipsoid, short from north to south and long from east to west, rotates and falls, throwing the mass into the middle.

In the 1976 astronomical constant system of the International Astronomical Union, the radius of the Earth's equator was 6378140 meters, and the Earth's flattening factor was 1 f. The Earth is not a positive sphere, but an oblate sphere, or rather, more like a pear-shaped rotating body. Observations by artificial earth satellites show that the Earth's equator is also an ellipse, which can be considered to be a triaxial ellipsoid.

The inertial centrifugal force of the Earth's rotation causes the spherical Earth to gradually expand from the poles to the equator, becoming the current slightly flattened spheroid shape, with a polar radius about 21 kilometers shorter than the equatorial radius. The uneven distribution of materials in the Earth's interior further causes irregularities in the shape of the Earth's surface. In geodesy, the so-called shape of the earth refers to the shape of the geoid plane, on which the gravitational position is the same everywhere, which is an isotopic plane.

The gravitational effect of the sun and the moon on the earth causes tidal phenomena in the oceans and atmosphere on the earth, and also causes the solid earth (to some extent, an elastic body) to undergo elastic deformation, which is the so-called "solid tide".

Ellipsoidal ......The Earth is flattened, and the distance from the north and south poles to the Earth's core is somewhat shorter than the distance from the equator to the Earth's core, about 21 kilometers shorter

Rounded, but the two levels are slightly flattened. That's because of the gravitational pull of the Earth. Overall it is round.

The Earth looks round from a distance, but it is actually elliptical. It's just that the radius of the equator is the radius of the poles.

The Earth is an irregular elliptical sphere with slightly flattened poles and slightly bulging equators. Earth is one of the eight planets in the solar system, the third planet in order from near to far, and it is also the terrestrial planet with the largest diameter, mass and density in the solar system, 100 million kilometers away from the sun.

What is the diameter of the Earth.

The diameter of the Earth is 12,742 kilometers. The Earth's equatorial radius is kilometers, the polar radius is kilometers, and the average radius is about 6371 kilometers. So the average diameter of the Earth is 2 6,371 = 12,742 km.

The Earth is an irregular sphere with a large diameter at the equator and a small diameter at the north and south poles.