What is the radius of the Earth

The Earth is not a regular object. First of all, it is not a positive sphere, but an ellipsoid, to be precise, an oblate sphere with slightly flattened poles and slightly bulging equators; Secondly, the north pole and north pole of the earth are also asymmetrical, in terms of sea level, the north pole is slightly convex, and the south pole is slightly concave; Third, the Earth's external topography is undulating (which has no effect on measuring the Earth's radius). The average is about 3959 miles (km).

Radius common values.

Polar radius. The distance from the center of the earth to the North or South Pole is about 3,950 miles (kilometers) (the difference between the poles is negligible).

Equatorial radius. It is the distance from the center of the earth to the equator, about 3,963 miles (kilometers).

Average radius. Approximately 3959 miles (km). This number is the average of the distance from the center of the earth to all points on the earth's surface.

It can be found as follows: mean radius = (equatorial radius 2 + polar radius) 3

Earth's radius is sometimes used as a unit of distance, especially in astronomy and geology. It is usually denoted by re.

The radius of the Earth is about kilometers.

The radius of the Earth is 6371 km.

Earth's radius refers to the distance from the center of the Earth to its surface (mean sea level). The Earth is not a regular object. First of all, it is not a positive sphere, but an ellipsoid, to be precise, an oblate sphere with slightly flattened poles and slightly bulging equators; Second, the Earth's South and North pole halls are also asymmetrical, with the North Pole slightly convex and the South Pole slightly concave at sea level.

Third, the Earth's external topography is undulating (which has an impact on measuring the Earth's radius). The average is about 3959 miles (km).Due to the rotation of the earth, the uneven density of the interior, and the external tidal forces, the shape of the earth deviates from the spherical shape.

At the same time, local topography increases this inhomogeneity, making the earth's surface conditions extremely complex.

Introduction to Earth

Earth (English name: earth; Latin: Terra) is the third planet from the Sun and the only celestial body known to mankind to give birth to and support life.

The surface of the earth is approximately a land mass made up of continents and islands. The remainder is covered by water, mostly by oceans, bays, and other saltwater bodies, but also by lakes, glaciers, rivers, and other freshwater bodies.

In particular, glaciers cover the most states, and together they form the hydrosphere. Most of the Earth's polar regions are covered in ice. The Earth's outer layer is divided into several rigid tectonic plates that migrate to the surface over millions of years while its interior remains active, with a solid iron core, a liquid outer core that generates the Earth's magnetic field, and a convective mantle that drives plate tectonics, among other things.

The above content refers to Encyclopedia - Earth.

The radius of the Earth is about 6,371 kilometers.

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, which is 100 million kilometers away from the sun. The Earth rotates from west to east while revolving around the Sun. There are 40 to 4.6 billion years old.

According to surveys from countries around the world, the radius of the Earth is about 6,371 kilometers.

There are five continents on Earth: Eurasia, Africa, America, Australia, and Antarctica, as well as many islands. The ocean includes the Pacific, Atlantic, Indian, Arctic and Southern Oceans and their affiliated seas.

At present, in the universe, only the earth is the most suitable for human habitation, so we should all take good care of the environment in which we live.

How the Earth was formed

The history of the earth is very long. According to radiocarbon dating, the solar system was formed about 6.5 billion years ago, while the native Earth was formed about 100 million years ago. According to the theory of Li Min, the formation of the sun began with the gravitational collapse of a huge cloud of hydrogen molecules 100 million years ago, and most of the collapsed masses were concentrated in the center, forming the sun.

The rest of the space rotates and flattens out to form a protoplanetary disk, which in turn forms planets, moons, asteroids, comets, meteoroids, and other small solar system bodies.

The nebula hypothesis asserts that the microplanets that form the Earth originate from the massaching masses of gas, ice particles, and dust with a diameter of 1 to 10 kilometers that are left over from accretion and collapse. These materials grew over 10 million to 20 million years to form the native Earth. The nascent Earth's surface is an "ocean" of magma.

The above content refers to Encyclopedia - Earth.

The polar radius of the Earth.

It is from its center the distance to the north or South pole, and is about 3950

miles (km).

Earth's equatorial radius.

It is from the distance of its center to the equator, and is about 3963

miles (km).

Spherical radius refers to the distance from the center of the Earth to its surface (mean sea level).

There are three common values for the radius of the Earth:

Polar radius: The distance from the center of the earth to the north or south pole, about 3,950 miles (km) (the difference between the poles is negligible).

Equatorial radius: The distance from the center of the earth to the equator, about 3,963 miles (kilometers).

Average radius: Approximately 3959 miles (

km). This number is the average of the distance from the center of the earth to all points on the earth's surface.

Equatorial radius, polar radius, equatorial circumference.

The diameter between the Earth's north and south poles is 12630824 meters. In 1743, the value of the pole diameter was announced: 12707216 meters.

In 1841, the famous German astronomer Bessel meticulously calculated a series of data about the Earth. He amusefully announced that the extreme diameter of the earth should be 12712156 meters.

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