Maybe the Earth isn t an irregular sphere, because the medium in space is different

The medium you're talking about is the atmosphere, because the vacuum doesn't affect the propagation of light.

From the ground to space, the air is thinner and thinner, but the entire surface of the earth is about the same thinner at the same height, so even if the refraction affects the astronaut's visual effect, the astronaut sees that the shape of the sphere is still the same as the earth.

In addition, the Earth's atmosphere is very thin compared to the Earth's radius (in satellites** you can see clouds as if they were attached to the Earth), so even if there is an impact, it is very small and negligible.

In addition, the rotation of the earth and the action of gravity will throw the material on it farther away from its axis, and the equatorial part is undoubtedly the farthest in the relative distance from the axis, so the matter on the earth has a tendency to accumulate towards the equator. So the earth is an ellipsoid.

Space is close to a vacuum, so such visual errors are not possible, and the Earth is not really a sphere, but an elliptical sphere.

If you say that the earth is definitely an irregular sphere from the perspective of classical physics, not only the astronauts said so, but also the ancient Chinese monks measured it, and the astronauts only looked at the earth through the thin atmosphere (its refraction effect is not large) and the earth is too big in the astronauts' line of sight, so no matter how it is refracted it is still an irregular sphere.

Modern physics, on the other hand, is not so simple.

No way! Whether the earth is irregular or not is not visible visually! It's been measured a long time ago! When human beings can go up to the sky to see whether the earth is round or not, then human beings will also sing!

The Earth is flattened because of the rotation of the Earth, the centrifugal force near the equator is the greatest, so the equator is slightly longer than the poles, as is the case with almost all planets that rotate!

Space is not an absolute vacuum, but the number of atoms per cubic centimeter is less than five. Virtually no effect on light.

You forgot. Space can almost be thought of as a vacuum. What kind of substance can affect vision.

Rules are not something to be seen.

It can be measured and calculated in many ways.

For example, the gravitational acceleration can be measured and calculated at some points on Earth that are more typical, and its characteristics can be understood in a similar way.

The Earth is an irregular sphere with slightly flattened poles and a slightly bulging equator. The interior of the earth has a core, mantle, and crust structure, and the outside of the earth has a hydrosphere, atmosphere, and magnetic field. The Earth's equatorial radius is kilometers, the polar radius is kilometers, the average radius is about 6,371 kilometers, and the equatorial circumference is about 40,076 kilometers.

Name**: The name "earth" is derived from the understanding of the shape of the earth, which can be traced back to the ancient Greek scholar Aristotle who proposed the name and concept of "earth" from the philosophical "perfection" of the sphere and the mathematical "equilibrium".

Westerners often refer to the earth as Gaia, a word that means "god of the earth" and "mother of the gods".

Earth is the third planet in the solar system from the inside to the outside, and it is also the terrestrial planet with the largest diameter, mass, and density in the system. The human beings who live on the earth often refer to the earth as the world.

Earth Environment: The Earth belongs to the solar system in the Milky Way, between Venus and Mars, and is the third closest planet to the Sun in the solar system, with a natural satellite. Earth was the first planet to be discovered with living individuals.

The global environment in which the earth is located refers to the cosmic environment centered on the earth, which can be understood from both the macro and micro levels. At the macro level, it refers to the position of the Earth in the celestial system, i.e., the Earth-Moon system, the solar system, the Milky Way, and the total galaxy; At the microscopic level, it refers to the position of the Earth in the solar system. In the infinite universe, the earth is just a drop in the ocean, it is in a never-ending motion.

Sitting on the ground and traveling 80,000 miles a day, the geographical knowledge is that the circumference of the equator is 40,000km, which is 80,000 miles, and it takes 1 day for the earth to rotate around a week, so this sentence means that if you sit on the equator and do not move, you will also move 80,000 miles in a day.

In general, the distance from the poles to the center of the Earth is 6,000 km); It is shorter than the distance from the equator to the center of the earth. The flattening ratio is 1 298. The equator is slightly convex, the equator itself is also a little flat, the northern and southern hemispheres are also asymmetrical, and the surface is uneven, it should be said that the earth is an irregular sphere.

Brief introduction

The equator is the dividing line between the northern and southern hemispheres and the zero latitude on Earth. The equatorial region is tropical twice a year, with hot weather and high temperatures. The center of the equator coincides with the center of the earth, and it is also the longest coil of latitude on the earth, with a total length of more than 40,000 kilometers.

The equator passes through Gabon, Congo, Zaire, Uganda, Kenya, Somalia, Maldives, Indonesia, Ecuador, Colombia and Brazil, among many other countries. In these countries, people use different signs to indicate the equatorial line. In the Congo, for example, the equatorial line is represented by a number of small pillars arranged in a straight line, called equatorial piles.

Mankind's Understanding of the Shape of the Earth Has Gone Through a Long and Difficult Process of Exploration After a long period of precise measurements, scientists have discovered that the earth is an irregular sphere with slightly flattened poles and slightly bulging equators

Therefore, the answer is: the poles are slightly flattened, and the equator is slightly bulging

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

So the answer is: the poles are slightly flattened; The equator is slightly drummed

The shape of the earth is:

The earth is not a normal 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. In fact, scientists have also debated the appearance of the earth. British physicist Isaac Newton.

It is proposed that the Earth cannot be a positive sphere due to its rotation on its axis.

Earth (English name: earth; Latin.

Terra) is the third planet to be from the Sun and the only known celestial body that harbors and supports life. Approximately the surface of the earth is 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, rivers, and other freshwaters, which together make up the hydrosphere.

The Earth's atmosphere is mainly made up of nitrogen and oxygen. The tropicsMore solar energy is received than in the polar regions and is redistributed through the atmosphere and ocean circulation. Greenhouse gasesIt also plays an important role in regulating the surface temperature.

The climate of a region is determined not only by latitude, but also by factors such as altitude and proximity to the mild ocean. Severe weather such as tropical cyclones, thunderstorms, and heat waves often occur in a wide area and have a great impact on life.

The gravitational pull of the Earth interacts with other objects in space, especially the Moon.

It is the only natural satellite of the Earth. It takes about a few days for the Earth to revolve around the Sun. The Earth's axis of rotation is tilted relative to its orbital plane, thus producing seasons on Earth.

The Earth was created long ago when rocks in the solar system collided with each other to form planets. From the beginning of its formation until the present, the earth has been mainly composed of liquid rocks. In space, where gravity is minimal, liquid matter will automatically form a spherical shape.

This has been demonstrated by experiments conducted by astronauts in the space environment with substances such as water, fruit juice and liquid metal. The Earth is a huge liquid sphere at a considerable distance from the Sun, which gradually forms a circle as it moves through space. Asteroids and small stars such as the moons of Mars are so weak in their gravitational pull that they cannot form a circle once they form a solid star.

Due to the large size of the Earth, its gravitational pull is strong enough to make itself circular. When the universe was formed. Many heavy metals are concentrated.

And the core of the earth was formed. And then attract non-heavy metal substances such as dust, but what is an elliptical shape in the earth position is related to the characteristics of the circle and its rotation. When the core of the earth reaches a certain weight.

The gravitational pull will cause the external force to carve. Because of the depression. Approaching the center of a metal with a heavier mass.

And the gravitational pull at the bulge. Because there is the thickness of the earth's crust. Whereas, the gravitational pull is weaker.

Lower depressions under gravity. It can't attract magma) And because almost all the metal materials in the center of the earth will emit nuclear energy in the early stage. The enormous heat turns the earth into a liquid state.

This force is even stronger. This causes the magma to fill in from the bulge to the recess. It also makes the crust at about the same distance from the center of the earth everywhere.

The distance from any point on the surface of the circle to the center of the circle. same) while the Earth has a center of mass. It already rotates.

The centrifugal force causes the Earth's equator to be slightly thicker than the meridian circle. That is, to make the earth incomplete and circular. Rather, it is an ellipse.