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Celestial bodies such as stars, planets, and satellites in the sky are constantly moving in the universe, and their modes and laws of movement also have their own characteristics.
And the most concerned celestial body is the earth, so how does the earth move in the universe?
Many people will say that the earth has been suspended in the universe, but this is actually thinking too much, the earth has actually been falling downward.
So how did the earth keep falling downward?
I can explain this in terms of gravity, which is generally referred to as gravitational force, and I will also take you through the way other celestial bodies in the solar system move.
Finally, some examples will be given to show the possibility of celestial collisions.
1. Gravitation causes the motion of celestial bodies.
Gravitation was proposed by Newton as a force that attracts matter to each other or between matter, and is mainly used to describe the way celestial bodies move in the universe, and it is also a basic law to explain the motion of matter.
In the solar system, in addition to the sun, other planets, moons, and asteroids move around the sun, and the moon may also move around the earth, and these celestial bodies do not revolve around the sun because the earth is born around the sun.
In fact, the movement of the Earth and other planets, as well as the Moon, in the universe is the result of the interaction of gravitational and inertial forces, that is, the movement of these celestial bodies is produced by the traction of these two forces.
And the magnitude and direction of gravitational force are also symmetrical, it is determined by the mass between two objects and the distance between objects, and the greater the mass between these two objects, the greater the attraction of gravitational force.
At the same time, the farther apart the objects, the smaller the gravitational attraction will be, and its direction is mutual, that is, object A will be attracted by object B, and object B will also be attracted by object A, but the two directions are opposite.
In the universe, the movement of objects is affected by the traction force, the object will approach the object with the greater traction force, and at the same time, the object will also be rotated around the object with the greater traction force by the traction force, which is the principle of the movement of celestial bodies such as planets and moons around stars and planets.
In this process, if the object is stationary, then the gravitational force between the two objects will pull the two objects together, and if the object is moving, then the motion of the celestial body will occur.
In addition to the gravitational traction, celestial bodies are also affected by inertial forces, which cancel each other out and together determine the trajectory of celestial bodies in space.
Under the traction of these two forces, the earth has a revolution and a rotation, the rotation period of the earth is 24 hours, and the rotation period is 365 days, both of which bring regular changes to the earth.
2. The rotation of the earth and the changes of the seasons.
The period of the earth's rotation is 24 hours, and the axis of the earth's rotation and the orbit of the revolution have a fixed angle, which is about 23.5 degrees.
This brings about the four seasons of the Earth, and the direction of the Earth's rotation is from west to east, which is exactly the opposite direction of the revolution, so that in different parts of the Earth, the sun will rise in the east in the morning and set in the west in the evening.
Due to the angle between the axis of the earth's rotation and the orbit of the revolution, it also brings about the change of the four seasons, and the distance between the earth and the sun is relatively far in the process of revolution, which makes the earth as a whole receive weak light energy, and the light time in different regions is also different.
In the northern hemisphere of the earth, the sunlight is more intense because the sun shines directly above, while the southern hemisphere receives less light energy at the same time due to the oblique rays of the sun.
As a result, the temperature in the northern hemisphere is higher than that in the southern hemisphere, and when the earth revolves around the sun, there will be a temperature change, that is, during the winter solstice in the northern hemisphere, the summer solstice will occur in the southern hemisphere, which will cause the distribution of temperature in the two hemispheres to be reversed during the summer solstice.
In other words, the temperature difference between the two hemispheres will become larger and larger, and during the spring and autumn equinoxes of the earth, the temperature difference between the two hemispheres will become relatively small.
3. The change of the phases of the moon and the principle of solar eclipses.
People in different parts of the Earth may see the Moon differently, which is why the Moon produces a change in the phases of the Moon on Earth.
The phases of the moon on the earth are exactly opposite to the changes of the seasons, and the angle between the orbit of the revolution and the axis of rotation is also 23.5 degrees, but the direction of this angle is opposite.
The direction of this angle is from south to north, which makes the angle of the moon different during the rotation of the earth, which affects the appearance of people seeing the moon, resulting in a change in the phase of the moon.
In addition to the change in the phases of the moon, the angle between the Earth and the Moon also affects the occurrence of solar and lunar eclipses, which occur on Earth due to the relative position between the Moon and the Sun.
When the moon rises from the east side of the earth, it blocks the sun, which produces a solar eclipse, and when the moon rises from the west side of the earth, the earth blocks the sun, which produces a lunar eclipse.
The principle of the moon phase change and the solar eclipse is due to the principle of the earth's rotation and revolution, which produces the change of the moon phase, and the sun has always been the same, but the relative position of the moon and the earth has changed, so that the appearance of the moon is different.
4. The solar system moves around the mass center of the galaxy.
In addition to the Earth's revolution and rotation, the entire solar system is also moving, the solar system moves around the star of the sun, and the planets, moons, and asteroids in the solar system all move around the sun.
The most typical is when the solar system is formed, when the planets are moving around the sun, and the collision between planets is also possible, so that there will be a collision between planets and planets, resulting in a collision between planets and new planets.
In the process of the formation of the solar system, the collision between stars and stars is also possible, but the probability of this happening is very small, but when the stars are formed, the collision between stars and planets is also possible, so what will be the result of this situation?
5. What changes may occur in the collision between celestial bodies.
Collisions between stars and planets are not possible in our solar system, because the mass of the Sun occupies 98% of the entire solar system, and the mass of the Sun is much greater than that of other planets.
But during the formation of the solar system, it is possible for a collision between stars to collide, although it is very unlikely, but it is very likely that such a collision will create new stars, and these newly created stars may move around existing stars.
At the time of the formation of the solar system, collisions between stars and planets were possible, and such collisions could create new planets, and at the same time, they could also cause the original planets to change their orbits, but such collisions were also very unlikely.
After the formation of the solar system, it is possible that a collision between the body and the celestial body will occur, although it is very unlikely, but after the formation of the solar system, a collision between the solar system and other galaxies is also possible, and this collision may cause the objects in the two galaxies to attract each other and finally merge into one galaxy.
After the formation of the solar system, it is also possible that collisions between the solar system and other galaxies will occur, and this collision may cause the objects in the two galaxies to attract each other, resulting in the creation of new objects that may move around the galaxy like the objects in the two galaxies.
epilogue
Celestial collision events are an important link in the evolution of the universe, which not only enriches the form of the universe, but also has a significant impact on the formation and evolution of celestial bodies.
Celestial collision events are also an important way of energy transfer and matter reorganization in the existing universe, and also have a significant impact on the circulation and distribution of matter in interstellar space.
Celestial collision events in the universe not only demonstrate the complexity and disorder of the universe, but also demonstrate the diversity of the universe and deepen the understanding of the universe.
Although there are collisions between celestial bodies in the universe, the vastness of the universe and the distance between bodies also provide a safe living environment for us to live in this unique home.