Who made the earth? How the Earth was born

When was the primordial earth born? According to the widely circulated scientific opinion, the primordial Earth was born about 50 million years after the formation of the solar system. But a new view put forward by Jacobson, a scholar at Harvard University in the United States, is that the primitive earth was formed much earlier than that.

Scientists believe that the solar system evolved from a huge nebula, and the material in this nebula was gravitationally gathered into different clumps, the largest clump formed the sun, and the other larger clumps formed planets including the earth. It is believed that the primordial Earth was born when the mass of material that formed the Earth gathered 64% of the Earth's present mass. Jacobson wrote in the American journal Science that they have conducted a new analysis of the process of the decay of hafnium isotopes into tungsten isotopes in the early days of the solar system, and revised scientists' original estimates to estimate that the original Earth was born within 10 million years of the formation of the solar system.

The solar system is thought to have been formed 4,56.7 billion years ago. Jacobson said in the article that in the next 10 million years, the primitive Earth had gathered 64% of the Earth's current mass, and at this time the Earth's "embryo" could be considered to have taken shape. The mark of the end of the process of the formation of the Earth was the birth of the Moon.

This event occurred about 30 million years after the formation of the solar system. Jacobson believes that the Moon may be the product of a collision between a Mars-sized object and the Earth.

The earth is a natural occurrence in the universe, just as there is a sun in the universe ... If there is no earth, there will be no human beings, and no one can know what the earth is??

Earth raw earth.

Here's how the earth was born:

After the formation of the nebula disk, due to the action of gravity and the instability of gravity, the material in the nebula disk, including the dust layer, was formed due to collision accretion to form many protoasteroids or stars, and after gradual evolution, they gathered into planets, and the earth was born in it.

The Earth originated from the primordial solar nebula 4.6 billion years ago.

The microasteroids that form the Earth originate from the remaining lumps of gas, ice particles, and dust with a diameter of 1 to 10 kilometers after accretion and collapse. These materials grew over 10 million to 20 million years to form the proto-proto-high-life Earth. The nascent Earth's surface is an "ocean" of magma.

The Earth was formed as a mixture of rocky materials, and if the accumulation process lasted for thousands of years, the decay of short-lived radioactive elements and the kinetic energy of solid particles would have little effect. The average temperature of the initial Earth is estimated to be no more than 1000, so it is all in a solid state.

After formation, due to the decay of long-lived radioactive materials and the release of gravitational potential energy, the interior slowly warms up, so that the iron contained in the primitive earth is converted into a liquid state, and some iron oxides will also be reduced. Liquid iron flows to the center of the earth due to its high density, forming the core of the earth.

Characteristics of the Earth:

The shape of the Earth is roughly ellipsoidal. The effect of the Earth's rotation makes it slightly more flat along the Earth's axis through the poles, with a slight uplift near the equator. From the Earth's core, the Earth's equatorial radius is 43 kilometers (27 miles) higher than its polar radius.

Thus, the farthest point on the Earth's surface from the Earth's center of mass is not Mount Everest, the highest elevation, but the summit of Mount Chimborazo in Ecuador, located on the equator.

The Earth's reference spheroid has an average diameter of about 12,742 kilometers (7,918 miles), which is about equal to (40,000 km) This integer is not a coincidence, but because the unit of length in the meter, which was originally defined as one-ten-millionth of the distance between the equator and the North Pole on the meridian passing through Paris, France.