What would happen if the earth lost its moon

　　The earth is an outlier in the solar system, built together by a series of highly unlikely coincidences, all of which are inextricably linked to the moon and have profound effects on all aspects of the earth. How exactly does the Moon help make Earth the perfect planet? What would happen if the earth lost its moon?
　　The relationship between the moon and the earth is not only related to the ebb and flow of tides and the changes of seasons, but also how it becomes a perfect planet suitable for human habitation. How exactly does the Moon help make Earth the perfect planet? What would happen if the earth lost its moon?
　　
　　The birth of the moon Compared
　　 with other satellites, the moon is an alternative: its diameter is a quarter of that of the earth, unlike other satellites and their planets. The difference is so great, and it is still the largest known satellite in the solar system.
　　 The way the moon is “born” is unique. Regarding the mystery of the moon’s life experience, the most reasonable explanation at present is: within a few million years after the formation of the earth, it collided with another young planet the size of Mars. The crust formed, destroying the menacing invading planet. The heavy metal core of the invading planet merged with the earth’s core, gradually condensing into a new star with a dense core and an extremely thin crust.
　　 The reason why the crust of the new star is thin is that the collision between the proto-Earth and the invader (astronomers vividly call it the “big collision”) caused the surfaces of both stars to melt, and the molten material mixed together went outward under the impact of the collision. Some of the splashes escaped completely into space, and some stayed around the earth, forming a ring from which the moon was conceived.
　　 By measuring lunar rock samples, we deduce that this earth-shattering collision occurred about 4.4 billion years ago. It not only gave birth to the moon, but also caused the earth’s axis to tilt severely, the earth rotated rapidly, and the four seasons were formed.
　　
　　The Earth is inextricably linked to the Moon The Moon’s gravitational pull has been influencing the Earth’s structure since the
　　 Great Impact, with the most obvious impact seen coming from tidal forces.
　　 Today, the distance between the Moon and Earth is more than 384,000 kilometers. But when the moon first formed, it was only 25,000 kilometers away from the earth. At that time, it can not only cause violent tidal fluctuations in the sea, but also pull solid objects on the earth. The rock layer 1,000 meters below the surface cannot escape its periodic pulling and oppression. At first, the heat generated by the moon’s gravitational pull kept the rocks on the earth in a molten state for a long time after the big impact, converging into a “sea of ​​fire”, which rose and fell with the tide. The energy used in this process comes from the orbital energy of the moon. As the orbital energy is gradually lost, the moon’s traction on the earth becomes weaker and gradually moves away from the earth, and the amplitude of the tides becomes smaller and milder.
　　 Today, the sea water on the earth rises and falls regularly twice a day, and the tide is about 1 meter high. The time of a tide rise and fall is about half a day, depending on the topography of the local coastline. But at the beginning of the moon’s formation (about 1 million years after the impact), the earth had high tides every 2.5 hours, and the waves were thousands of meters high. At that time, the Earth was spinning 10% faster than it is today, and a day was only 21 hours long.
　　However, in the billions of years since the moon formed, one thing has not changed, and that is the tilt angle of the earth’s axis, which is still inextricably linked with the moon. Because the moon uses its own gravity to constrain the shaking range of the earth, which plays a stabilizing role.
　　The planets (and moons) in our solar system are tugged on each other by gravitational forces. As the planets move in their orbits, the strength of the gravitational pull will change. Smaller planets (such as Earth and Mars) are extremely vulnerable to larger objects. (like the Sun and Jupiter).
　　 Mars does not have relatively large satellites as its “stabilizers.” Computer simulation results show that it sometimes tilts to 45 degrees suddenly (the “sudden” here is about 100,000 years on Earth), and sometimes it tilts slowly to 60 degrees. If there is no moon, the tilt angle of the earth’s axis will change from 0 degrees to 90 degrees in 100,000 years, causing a huge change in climate. Feng Shui turns, day and night will be reversed, and the tropics where the sun never sets will be in the night where the ice and snow will never melt. But, thanks to the moon’s stabilizing effect, such ultra-extreme climates haven’t happened since life arose on land.
　　’Standing firm’ away from Earth
　　 Of course, nothing lasts forever in the world. The moon has “maintained stability” for more than 4 billion years, and now it is “stepping firmly” away from the earth, moving outward at a rate of about 4 centimeters per year, and its stabilizing effect on the earth has also weakened. Scientists have used computer simulations to deduce that from now on, about 2 billion years from now, the moon’s gravitational force will no longer be able to compete with Jupiter, and the tilt angle of the earth will swing violently at that time.
　　 Long ago, in the time of the dinosaurs, the Moon appeared to be much larger than it is now, and during a total solar eclipse it could easily completely block the Sun. At that time, humans had not yet appeared. In the not-too-distant future, during a total solar eclipse, the moon’s edge will be shrouded in a clearly visible halo. At that time, if human beings still existed, they could still witness that beautiful scene.