Lead
The universe is so vast and distant, people feel that their knowledge is so small that it is desperate, but it is this feeling that makes human beings more eager for knowledge, more eager to explore unknown areas, since ancient times, human knowledge exploration has never stopped, from the earliest earth to the later earth rotation, to the earth where the solar system movement, and then to the later galaxy movement, human beings continue to realize their own insignificance, but it is precisely because of this that human beings are more enterprising, continuous progress, and constantly explore new areas.
From this point of view, the survival of human beings does not seem to be important, and in what way does the earth advance in space? What is the destination of the earth?
1. The law of the Earth's rotation and revolution.
It is the rotation and revolution of the earth that makes our lives alternate between day and night, and the seasons alternate.
The rotation period of the earth is 24 hours, and the rotation period is about 365 days, both of which are relative, the rotation of the earth refers to the rotation of the earth around its own axis, resulting in the phenomenon of day and night, and the rotation of the earth refers to the rotation of the earth around the sun, forming the phenomenon of the alternation of the four seasons.
The Earth's orbital speed is about 30 kilometers per second. The rotation speed of the earth is about 0.46 kilometers per second, and the rotation speed of the earth is much smaller than the rotation speed, so the rotation of the earth cannot be clearly felt on the earth, but we can clearly see through the changes in the starry sky that the obvious changes in the starry sky brought about by the rotation of the earth, because the earth rotates around the sun at the same time, the sun is also rotating around the center of the galaxy at a rate of 225 million years per year, and the earth is also rotating around the center of the milky way, so the stars that the earth sees at night are also constantly changing.
The rotation of the earth once produces the phenomenon of day and night alternation, because the earth rotates, so the time of different places on the earth is also different, and the rotation of the earth produces the phenomenon of the alternation of four seasons, because the earth's orbit is elliptical, so when the earth is closest to the sun, the earth's movement speed will be faster, correspondingly, when the earth is farthest from the sun, the earth's movement speed will be slowed down, so the time point of the alternation of the four seasons each year is determined by the earth's orbit.
The orbit of the earth is an ellipse, and the sun is located at one end of the ellipse, which determines that when the earth moves to the perihelion of the orbit, the earth will be closer to the sun, the angle of sunlight will be greater, and the sun's energy will be released more, so it is what we call summer, and when the earth moves to the aphelion of the orbit, the earth will be far away from the sun, and the angle of sunlight will be smaller, so it is what we call winter.
2. The movement of the solar system.
In the solar system, the sun is the star of the earth, it conducts nuclear fusion to release energy, and the release of energy from nuclear fusion will produce huge light and heat, which is also the energy that we humans need, and all life on the earth depends on the energy released by the sun to survive.
The Sun moves in the same way that the Sun moves around the Sun in the same way that the Earth moves around the Sun, just as the Earth revolves around the Sun. The sun is also revolving at a rate of 225 million years per year, the sun revolves around the center of the Milky Way, but the period of the sun's rotation is only 25.05 days, which is much smaller than the period of revolution around the center of the Milky Way, the rotation speed of the sun is inconsistent, the equatorial region of the sun rotates the fastest, about 25.4 days per day, while the mid-latitude region is about 27 days, and the polar region is about 35 days.
This causes the rotation speed of the sun in different latitude regions to be different, so the sun will also produce a huge rotation force, but the rotation force of the sun will not have a significant impact on the movement of the Milky Way, this is because the rotation period of the sun is too short, and the influence range of this rotation force is too small, so for the Milky Way, the rotation force of the sun is negligible, but the gravitational force generated by the rotation of the sun cannot be ignored, and the gravitational force of the sun determines the distance between the sun and the center of the Milky Way. This gravitational movement is also clockwise, so the gravitational pull of the sun can counteract the gravitational force generated by the sun's rotation, so that the sun's rotation has no effect on the motion of the center of the galaxy.
3. The movement of the Milky Way.
In what way does the sun move in the solar system?
The sun moves around the center of the Milky Way, but how does the Milky Way move?
The Milky Way moves in an expanding universe, but how does the sun in the Milky Way move?
The Milky Way is composed of a large number of galaxies and star clusters, stars, star clusters, gas and dust clouds, etc., the radius of the Milky Way is about 50,000 light years, and the Milky Way is also affected by the gravitational influence of the "giant gravitational source", so the galaxies and stars in the Milky Way are constantly rotating, the Milky Way is also constantly rotating, the Milky Way has 4 spiral arms, the outline of the Milky Way is like a plate, but it is not a neat plate, so the Milky Way is spiral, and it is precisely because of the shape of the Milky Way, So we can't see the whole picture of the Milky Way.
At present, the latest model of the Milky Way is that the Milky Way is spiral, and there is a huge black hole in the center of the Milky Way, the mass of this black hole is about 4 million times the mass of the sun, and the black hole in the center of the Milky Way is not for the so-called horror existence, and people do not need to be afraid, because the center of the Milky Way is about 30,000 light-years away from the Earth, so it can be said that the black hole in the center of the Milky Way will not have an impact on the Earth.
The Milky Way is moving towards the Andromeda Galaxy, and the Andromeda Galaxy is also part of the Milky Way, which is currently 2.4 million light-years away from the Andromeda Galaxy, and according to the speed and direction of the Milky Way, the Milky Way will collide with the Andromeda Galaxy in 3.8 billion years, but there is no need to be afraid, because at that time human beings have long ceased to exist.
4. What is the destination of the earth?
In what way does the earth advance in space?
Can humanity find its destination on Earth?
There is a kind of celestial body in the universe called independent celestial bodies, which are independent and do not rely on the gravitational pull of other objects for motion, but in what way do independent celestial bodies move?
How did humans discover the movement of the earth in space?
Human beings have discovered the speed of the earth's movement by measuring the cosmic microwave background radiation, this method is called the Doppler effect, the earth moves 630 kilometers per second in space, and it is this high-speed movement that brings human beings the phenomenon of day and night, the alternation of four seasons, etc.
But what is the ultimate destination of the Earth?
This question is more complicated, because there are endless unknown areas in the universe, and the earth may never find an end, because the universe is expanding, and if the universe continues to expand until the heat death state, then the earth has no destination, but how does the earth move forward?
The earth is also moved by the gravitational pull of the sun, and in what way does the earth move in the solar system?
Human beings measure the redshift of sunlight through the Doppler effect, and find that the sun is also moving in the direction of the Andromeda galaxy at a speed of 20 kilometers per year, and it is precisely because of the movement of the sun that the earth is also affected by the gravitational pull of the sun, and the earth moves in a spiral way towards the universe.
epilogue
The vastness and mystery of the universe have stimulated human beings' desire for knowledge and exploration, but human beings on the earth are just a speck of dust in the universe, and the field we have not yet explored may be far beyond our imagination, but human beings are still moving forward, step by step into new unknown areas, although human beings' understanding of the universe is limited, but the speed of our continuous progress and the accumulation of knowledge will promote us to move towards deeper exploration.
Our value lies in the process of exploration and thinking, not in the outcome.
The process of exploring the universe is not only an extension of one's own cognition, but also a challenge to human wisdom and technology, which promotes the development of science and technology and the progress of civilization.
Although the vastness and immensity of the universe make human beings small, it is this smallness that makes us cherish and respect life more, and cherish and maintain the unique home of the earth even more.