Why does the sun go to the center of the universe
In short, at that time, because people did not know that the earth was rotating, the process of the sun rising and setting seemed to be that the sun was rotating around the earth every day, so it was generally believed that the earth was the center of the universe. But if the earth is the center of the universe, the trajectories of some planets (mainly galaxies in the solar system) cannot be explained
take Mars as an example, when people observe Mars with telescopes on earth, the trajectory of Mars is very strange. Roughly speaking, when we observe it on earth, its orbit is generally counter clockwise, but every two years, Mars will reverse for two months, and then return to its usual counter clockwise orbit. In the era of geocentrism at that time, it was a very difficult phenomenon to explain. There was no external force in the universe to pull Mars to move in such a regular way. At that time, scientists and astrologers were confused about why Mars would move in such a way
This phenomenon can be well explained by Copernicus's heliocentric theory. The earth's revolution speed is one year, while Mars's cycle is nearly two years. The earth's cycle is shorter and faster than Mars. As a result, the earth will catch up with Mars about once every two years
by looking at the figure below, you can easily understand why heliocentrism is the only way to explain Mars's strange way of operation. Geocentrism cannot explain this phenomenon. Of course, Copernicus put forward the heliocentric theory thanks to a Danish astronomer more than 400 years ago. Although he did not believe Copernicus's theory, he introced his observation results to Kepler. According to this theory, Kepler obtained Kepler's law, that is, the closer a planet is to the sun, the faster its revolution speed. So according to the heliocentric theory, Mars is not going retrograde
with this law, human beings can know that the revolution speed of the earth (30 kilometers per second on average) is faster than that of Mars (24 kilometers per second on average). With this law, we can perfectly explain the correctness of Heliocentric theory. Of course, the heliocentric theory has its limitations. It is limited to the solar system. In any case, the heliocentric theory was a great progress for the astronomical circles at that time
in the picture, the path of Mars is observed from the earth in the process of the earth surpassing Mars, and the reference object of the background is the zodiac constellation
the sun is not the center of the universe, but the central star of the solar system, and the solar system is located in the Orion spiral arm of the Milky way, tens of thousands of light-years away from the center of the Milky way.
and the Milky way is just one of the countless galaxies in the universe, the universe is boundless and has no center, It is impossible for nature to have a geometric center
the sun is not the center of the universe, but the central star of the solar system, which is located on a remote arm of the Milky way, tens of thousands of light-years away from the center of the Milky way
and the Milky way is just one of the countless galaxies in the universe. The universe is boundless and has no center. According to Einstein's theory, the universe is "limited and boundless". Without boundaries, there can be no geometric center
in addition, the heliocentric theory holds that all celestial bodies except the sun orbit around the sun in a circular orbit, which is totally wrong. First of all, only planets, asteroids, dark planets, comets, satellites and other celestial bodies in the solar system orbit the sun in elliptical orbits. And the solar system as a whole, is to follow the arm spin around the center of the Milky way. As a whole, the galaxy has its own way of motion
therefore, our sun is totally insignificant in the universe, just a common star.
human beings are not able to walk out of the solar system now, so most of the research work can still be carried out with the sun as the center. So at present, the sun can be temporarily defined as the center of the universe.
The sun is the central celestial body of the solar system. Its mass accounts for more than 99% of the total mass of the solar system. Its radius is 109 times that of the earth, and its volume is 1.3 million times that of the earth. Sun, what a giant! But in the eyes of astronomers, it's just one of hundreds of millions of stars. It's not the center of the universe