Author: Ruili'an | Pirates will be prosecuted
How big is our universe and where is its center? In the vast universe, the number of galaxies exceeds one trillion, and this number is constantly increasing and expanding as the universe expands. The universe is composed of the invisible dark matter and dark energy, and is the universe we currently recognize. Many of us always have a big question in our hearts, which is how big the universe we know is and where the center of the universe will be. Because the spatial latitude of the universe has surpassed our human imagination.
For the vast universe, this question and thinking not only crosses the boundaries of time and space, but also has penetrated the entire human civilization. From ancient times to modern civilization, ancient Chinese sages thousands of years ago were obsessed with the starry sky above our heads and wanted to explore this profound and mysterious celestial body. Some ancient philosophers proposed the concept of a round sky and a round place. The first concept of a round sky and a place was in the Warring States period more than two thousand years ago. At that time, there was a great scholar named zijiao . He lived between about 400 BC and 300 BC. He said that the four directions are called Yu, and the past and present are called Zhou. Zi Jiao proposed the concepts of space and time very clearly.
Tianyuandi also became a philosophical thought in ancient China, which is a manifestation of Yin-Yang theory . The sky and the circle symbolize movement, the earth and the earth symbolize stillness, and the combination of the two is the balance of yin and yang and the complementarity of movement and stillness. The design concept of a round sky and a place is reflected in ancient China's architecture, currency, etc. It symbolizes the political idea of , Confucianism, and the inner and inner legal thinking of being a person in a worldly manner.
As humans understand the earth, they continue to study and find that they have gradually realized that the earth is a spherical celestial body. The understanding of the round sky and the place is mainly limited by ancient observation technology and the limitations of human beings in the observation position of the earth. Therefore, humans early believed that the earth was the center of the universe. The sun rises in the east and sets in the west, the moon changes day and night, and the position of the stars make humans mistakenly believe that the earth is the center of the universe, and the sun and the moon are orbiting the earth, repeating the cycle.
1543, astronomer Copernicus proposed the heliocentric theory that the earth is not the center of the universe, but the center of the earth-moon system. So what is the concept of the Earth and Moon system? The earth and the moon form an celestial body system , called the Earth-Moon System. In the Earth-Moon System, the Earth is a central celestial body, so the movement of the Earth-Moon System is generally described as the orbiting movement of the moon to the earth. However, the actual movement of the Earth-Moon system is the movement of the Earth and the Moon in relation to their common centroids. The time for the earth and the moon to rotate around their common center of mass is about 28 days. The position of the common center of mass is within the earth's body about 4,671 kilometers away from the center of the earth.
celestial system composed of the earth and the moon, and the earth is its central celestial body. Due to the huge difference between the earth's mass and the moon's mass, the mass center of the earth-moon system is only about 1,650 kilometers away from the surface of the earth. The commonly referred to as the distance between the sun and the center of mass of the earth and the moon system. The commonly referred to as the moon orbits the earth and the earth also refers to the revolution of the earth and the moon relative to their common center of mass. Due to this revolution, the common center of mass is inside the earth, and there is a displacement periodically with the earth's stars and moons.
All celestial bodies are actually rotating around the sun. Any movement we see in the sky is caused by the movement of the earth. The heliocentric theory proposed by Copernicus effectively broke the geocentric theory , which has long been dominant in religion, achieved fundamental changes in astronomy, opened up human cognition of the true universe, and human beings gradually shifted the concept of earth-centricity to the wider solar system. With the continuous development of technology and the advancement of telescope technology, humans have begun to discover that there are even larger galaxy systems in the universe.
The heliocentric theory proposed by Copernicus is only limited to cognition in the solar system.The solar system is only one of the 200 billion galaxies in the Milky Way galaxy. In other words, in , there are at least 200 billion galaxies of the size of the solar system in . The solar system is located in a corner of the Milky Way, not in the center of the Milky Way. Instead, it is on a galaxy in the Milky Way, the solar system is located on the edge of the inside of the spiral. The speed in the Milky Way is about 220 km/sec, and it takes about 225 million years to orbit around Galaxy .
Here is about 26,000 light-years away from the center of the Milky Way. At the center of the Milky Way is a huge black hole, with different galaxies distributed around the black hole in the Milky Way, like a huge black vortex. These galaxies are likely to be involved in black holes at any time. If you think this scale has exceeded your imagination, it is simply incredible. However, as scientists explore and study one after another, more information was discovered. In the vast universe, there are many galaxies as huge as the Milky Way and are even far away from us. With current scientific detection technology, it is difficult to reach and reach. As the universe continues to expand, those out of reach celestial galaxies will become further and further away from us. We can’t help but wonder, how big is this universe? The expansion speed of the universe has far exceeded the speed of light, and the size of the universe has exceeded the imagination of human beings.
How big is the universe? Where is the center of the universe? What is the shape of the universe? What does it look like outside the universe? If the theory of the sky and the earth is still applicable, the universe is an infinitely expanding great circle. Humans cannot satisfy the earth under their feet, but continue to move towards the wider universe.
