Why does the earth exist and why does the earth exist?

The systematic scientific study of the origin and evolution of the earth began in the middle of the eighteenth century, and several theories have been put forward to this day. It is now popular to believe that the Earth, as a planet, originated from the primordial solar nebula 4.6 billion years ago.

Like other planets, it has undergone some common physical evolutionary processes such as accretion and collision. At the beginning of the formation of the earth's fetus, the temperature was low and there was no layered structure, but the temperature of the earth gradually increased due to the bombardment of meteorite material, the heat caused by radioactive decay and the gravitational contraction of the primitive earth. As the temperature rises, the earth's internal materials become more and more plastic, and there is a phenomenon of local melting.

At this time, under the action of gravity, the differentiation of matter begins, the heavier material outside the earth gradually sinks, the lighter material inside the earth gradually rises, and some heavy elements (such as liquid iron) sink to the center of the earth, forming a denser core (the observation of ** waves shows that the outer core of the earth is liquid). The convection of matter was accompanied by large-scale chemical separation, and finally the Earth gradually formed the layers of the crust, mantle, and core that it has today.

In the early days of Earth's evolution, the primordial atmosphere escaped. With the recombination and differentiation of matter, various gases that were originally in the earth's interior rose to the surface through volcanic eruptions and other actions to become the second generation of the atmosphere, and later, due to the photosynthesis of green plants, it further developed into the modern atmosphere. On the other hand, the temperature of the Earth's interior increases, which vaporizes the crystalline water inside.

As the surface temperature gradually drops, the gaseous water condenses and rainfalls to the ground to form a hydrosphere. About.

Three or four billion years ago, single-celled life began to appear on the earth, and then gradually evolved into a variety of organisms, until advanced organisms such as humans constituted a biosphere.

Because after the formation of the sun, the star dust slowly gathers together.

It's pure chance, but it's also inevitable.

Because there are very few planets with a suitable chance of life, but we happened to be born here, so the planet we live on is Earth.

The universe is big**.

Countless dusts are formed, gravitational pull, and gradually form a mass, and because of its own constant movement, it rotates, and finally forms an organic whole.

I guess).

It's a lot of accidents, but there are countless opportunities to succeed.

It's philosophy, it's not physics... If you want to ask how the earth was formed, it is better to answer a little ...

What is the existence of the earth in the universe? Why is Earth Earth? How hard is it for the Earth to come into being?

The birth of the Earth was the result of the evolution of the solar system. The solar system began as a nebula of gas, and as the molecules in the nebula collided as they attracted each other, they began to accumulate in the center, and after a slow process, the central sphere eventually formed the sun, and the outer disk was the birthplace of many planets. The large disk first splits into several rings, and the material in each ring is absorbed together in a similar process to form planets.

Earth is one of them.

The above is a brief process of the formation of the earth, and if you want to ask why the earth exists, then we can only tell you: existence is reasonable, because it is inevitable, so it exists.

If you think about it this way, why do you exist? Because of your parents. Then why does the earth exist, because there is a universe and space. It's a philosophical question. The existence of the earth is that there is a universe, just as there is life with the earth.

Ask the Creator! Ask this question, what is the guess of that?

The predecessor of the earth was actually originally a sunspot in the arms of the sun, just like the sunspots in the arms of the sun now, and the predecessors of the nine planets and their moons were all sunspots!

Sunspots are formed by the differentiation of the sun's surface material force. Repulsors radiate into space in the form of photoelectrons, and gravitons accumulate in the form of sunspots to form a vapor-liquid mixture of sunspots or sunspot groups.

When the sunspot stream accumulates to a large size, an extremely powerful radio burst that is suppressed under the cover of the sunspot stream shoots the sunspot stream into space in one fell swoop! Thus forming a new planet or with several moons. The nine planets and their moons were all born and formed in this way, and the earth is no exception.

When the Earth was born, it was a steam-liquid mixture with a body temperature of about 1,000 degrees, and after being thrown into space by the sun, it gradually cooled down to form a solid shell.

Why does the earth have spring, summer, autumn and winter?

There is a theory that on the other side of the sun there is a bearth, rich in matter, and suitable for the rapid survival of man. And does this bearth really exist?

According to the theory of celestial body, the existence of a celestial body will inevitably have a gravitational connection with the surrounding celestial bodies, just like the sun and the earth, there is a huge gravitational connection between them. Of course not, this is also a centrifugal force generated by the rotation of the Earth around the Sun.

In the same way, in order to keep the earth in the same orbit as the earth, the earth must have the same mass as the earth to meet the condition that gravity and centrifugal force are equal to the centrifugal force, but according to Bode's law, only the earth is allowed to exist in the orbit of the earth in the orbit of the sun, so it is said that the earth does not exist.