When was the earth born, and when was the earth born

The Earth is generally thought to have been born 4.6 billion years ago.

It is believed that the Earth and the solar system, including the Sun, were born at the same time. About 5 billion years ago, there was a huge piece of nebulous material. The density is very high, and due to the influence of its own gravitational effect, the shrinkage and aggregation first form the sun.

After a series of physical and chemical changes, it became the sun it is today (such as thermonuclear reactions). The remaining smaller clouds form other planets and moons, comets and other celestial bodies in the solar system.

Earth is one of the eight planets in the solar system, the third in order of near and far from the sun, 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. The Earth rotates from west to east while revolving around the Sun. It is 4,04.6 billion years old, and it has a natural satellite, the Moon, which forms a celestial system, the Earth-Moon System.

The Earth's equatorial radius is kilometers, the polar radius is kilometers, the average radius is about 6371 kilometers, and the equatorial circumference is about 40076 kilometers. The surface area of the earth is 100 million square kilometers, of which 71% is oceans and 29% is land.

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 is the only celestial body in the universe where life is known to exist, and it is home to millions of living beings, including humans.

1. The earth was born 100 million years ago.

2. The material of the solar system originated 100 million years ago, and about 100 million years ago (about 1% error), the earth and other planets in the solar system began to form in the form of a disk formed by the gas and dust left over from the formation of the solar nebula. Through the process of accretion, the Earth has been roughly fully formed over a period of 1 to 20 million years. From its initial molten state, the Earth's outer layers first cooled and solidified into a solid crust, and water began to accumulate in the atmosphere.

The moon formed relatively late, about 100 million years ago, when a Mars-sized object with a mass of about one-tenth of the Earth's mass (commonly known as Theia) collided fatally with Earth. This early town sent part of the mass of the celestial body to the Earth Brigade Sphere, and part of it splashed into space, and enough material entered orbit to form the Moon.

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Problem description: We have lived on the earth for many years, when was the earth born?

Analysis: The birth of the earth (about 4.6 billion years ago).

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!

The black is formed by the differentiation of the material force on the surface of the sun. Repulsors radiate into space in the form of photoelectrons, and gravitons accumulate in the form of sunspots to form a vapor-liquid mixed sunspot flow or sunspot group pin.

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.

At the time of the birth of the earth, there was also a sub-black stream, which was ejected by the sun's extremely powerful radio explosion and the earth at the same time, which is the moon! At that time, there were also some small sunspots that had lost their balls, and because their internal energy was exhausted early, they had already fallen to other stars.

When the earth was born, it was a steam-liquid mixed vortex 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 ......

History of the Earth.

The Earth was born about 4.6 billion years ago. At that time, around the Sun, there were many asteroids with a diameter of 10 kilometers, which revolved around the Sun. The Earth was created during the repeated high-speed and violent collisions between these asteroids, and gradually increased in size.

As the number of planetary impacts decreased, the Earth's surface began to cool, clouds sank, and centuries of uninterrupted and continuous rainfall, the result of which was the formation of oceans. Thus, the first life was born. After the rise and fall of a wide variety of organisms, humans emerged.

Reasons for protecting the global environment.