What is the shape of the earth and what is the shape of the earth?

How did it come to be!!

The Earth is a member of the solar system. The solar system family consists of the Sun, Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune, Pluto, and 500,000 asteroids, moons, and comets. The Sun is the parent of the solar system.

Before the formation of the solar system, it was a nebula made up of red-hot gas, which rotated when the gas cooled and caused contraction. Due to gravity, the gas and wind wind and grass contract and rotate faster, and the nebula becomes a flat disk. We know that the washing machine used to wash clothes in modern families has a dehydrator, put wet clothes in it, and the dehydrator rotates quickly, and the moisture in the clothes will be "thrown" out, and the wet clothes become dry clothes.

The force that throws water out is the force generated by the water droplets leaving the center when they move in a circular motion, which is called centrifugal force. In the same way, when a rotating nebula shrinks and rotates, and the centrifugal force of the surrounding matter exceeds the centrifugal pull of the center on it, it separates a ring. And just like that, one ring after another was created.

Eventually, the central part becomes the sun, and the surrounding rings become planets, one of which is the Earth, which was created four or five billion years ago.

This is a scientific hypothesis, a doctrine put forward by the German philosopher Immanuel Kant and the French mathematician Laplace in the 18th century. In 1944, the German physicist Weizak developed this theory.

Research on the origin of the solar system and the formation of the Earth continues and continues to improve. Nevertheless, the earth is the mother of our humanity and nurtures us to grow up. We humans should know it, understand it, and even if one day, human beings move to other planets, we will always miss it.

Does the landlord want to ask how the earth was formed? Now regarding the origin of the solar system, it is accepted that the nebula hypothesis proposed by Kant and Laplace is proposed. It is believed that the solar system was formed about 5 billion years ago by the accumulation of material from the primordial nebula.

The Earth was born from this nebula about 4.6 billion years ago.

If you ask about the shape of the earth, it is about an ellipsoid.

It's an oval. Due to the force of the Earth's turning center, the Earth's equatorial circle will be larger.

Elliptical. One of the meanings of the Earth's rotation is that it shapes the Earth. That's what the high school geography book says.

It is actually elliptical, but in physics it is generally regarded as an ideal spherical shape.

The Earth is an irregular sphere with slightly flattened poles and a slightly bulging equator.

The earth is not a regular sphere, but an irregular sphere with slightly flattened poles and slightly bulging equators, with an average radius of 6,371 kilometers and a maximum circumference of about 40,000 kilometers and a surface area.

About 100 million square kilometers.

However, it has been a long process to get this correct understanding.

The reason why the earth grows like this is because it not only revolves around the sun, but also rotates at the same time, and the surface of the earth has both land and water, and in order to maintain the internal gravitational balance, under the "fight" of all parties, it grows into this strange shape.

The ball is not round.

Interpretation. 1. Surface tensionA drop of liquid suspended in space is spherical! This is due to the action of surface tension.

The Earth is almost liquid except for the solid surface of the Earth, which is a solid surface, and the Sun is even more fluid. Due to the same principle, it is spherical.

Interpretation. 2. Gravitational force. If not affected by external forces, all objects have a tendency to concentrate towards the center under the action of gravitational force. The most concentrated knots.

It's spherical! Although the surface of the earth is solid, because solids are also deformable, and solid fragments can move, these.

all make it possible to transform it into a spherical shape.

The activity of energy in the Earth's interior makes the Earth irregularly shaped. However, the stones of the mountains are rolled down from a high place by the gravitational pull of the earth (gravitational pull), and the rivers carry the sediment from the high to the low-lying oceans (the rivers also flow by the gravitational pull of the earth)...These are all examples of concentration towards the center, and they all make the earth.

The ball changes from irregular to spherical. If the Earth's interior ceases to move, it is possible that in many billions of years the Earth will become a very standard spherical shape (with the exception of centrifugal force and the gravitational pull of other celestial bodies).

Many asteroids, due to their own small mass, resulting in their own gravitational force is relatively small, and the star is generally composed of relatively hard solid rock, it is difficult to complete the process of moving to the center under the action of its own gravity, so their shape is strange, oval, rod-shaped.

With the continuous advancement of measurement technology, especially the use of artificial earth satellites, the Earth is now measured.

The equatorial radius is 6378140 meters, the polar radius is 6356755 meters, and the difference between the two is 21385 meters.

1/。In this respect, the earth is much rounder than oranges.

In addition, it has been found from the measurement that the equator of the earth is not a perfect circle, but an ellipse, the maximum.

The radius differs from the minimum radius by more than 200 meters. It was also found that the northern hemisphere of the earth is more slender than the southern hemisphere; North pole.

The area of geoid (i.e. mean sea level) is about 10 meters higher than the reference oblate sphere, the Antarctic region.

Rule. It should be recessed for about 30 meters. Therefore, some people compare the shape of the earth to a pear, and the earth body is said to be pear-shaped.

Body. In fact, the earth is neither like an orange nor a pear, but a sphere with its own unique shape.

If we shrunk this huge Earth into a globe with a diameter of 1 meter, the radius of the equator is only greater than the poles.

The radius is more than 1 mm long, and this slight difference cannot be represented on the globe, so we use it.

Target. The globes are still perfectly round.

I know it's not round.