If you think of the earth as a frame of reference, how does the sun move?

That is equivalent to letting the earth move, then the sun rotates from east to west in an elliptical orbit around the earth city, just like watching the sun rise in the east and set in the west on the earth, and the earth is also used as a reference system.

It can be considered as a uniform circular motion.

As we see every day, the east rises and the west falls.

Don't you look at it every day, at this scale, using the earth as a frame of reference is similar to using you as a frame of reference. What movement you see the sun doing is the answer you want.

Movement around the Earth.

It's pretty much the same as geocentrism.

The trajectory of the sun shows that the earth is orbiting the sun, that is, the earth is constantly rotating around the sun, and the sun is the center. In the universe as we know it, the Sun is the center of the universe, and all Jupiter, Mercury, and Mars are rotated by the Sun. The revolution of the earth is the rotational motion from west to east around the sun.

The trajectory of the sun, the final illustration of the Earth's rotation around the Sun from west to east.

The first to propose the movement of the earth around the sun was the ancient Greek astronomer and mathematician Aristarchus, who was born on the island of Samos in the Aegean Sea. He was the first to think that the sun was much larger than the earth. Engels.

Calling him "the Copernicus of antiquity, he was born in 310 BC, a full 1,800 years before Copernicus."

Not only did Alistak propose that the earth and planets revolve around the sun, he also calculated the relative size and distance of the earth, moon, and sun, and deduced that the sky was not a sphere, but an almost infinite sum of space. But no one paid much attention at the time.

During his lifetime, Alistak was known as a mathematician rather than an astronomer. But we don't know much about him, except that he studied at the Lycion School of Alexandria and the ancient Greek philosopher Aristotle.

Coached here. —Translator's note, which was later described by the ancient Roman architect and writer Vitruvius as "a man of great knowledge in all fields of science." He also invented the hemispherical sundial.

Only one of his books has survived: The Size and Distance of the Sun and the Moon. It is a pity that the book does not mention his heliocentrism. The reason why we know this theory is because of Archimedes.

Copernicus must have known about Aristak as well, because of his epoch-making work On the Motions of the Heavenly Bodies

Alistarch is praised in the manuscript. However, when the book was published in 1514, all references to the visionary Greek were removed, presumably because the publisher feared that the content would undermine the book's originality.

Astronomers can use space telescopes to observe the light emitted by stars trillions of light-years away, but in fact the light has traveled for tens of millions of years, so the universe and the stars we observe may have been destroyed or no longer in their original locations.

What is the universe made of?

Cosmic space consists of a huge supergalaxy surrounded by an invisible outer space. Each planet also includes billions of planets, and the chemicals of these planets are small invisible particles. Protons, neutrons, and electronic devices are the most common particles, and they are usually fused together in the form of molecules.

Protons and coarse paraneutrons are made up of smaller groups of particles, called quarks.

How do humans observe changes in the universe?

Over the years, scientists have tried a single law of scientific research to express the movement of the universe, and they are conducting scientific research in the direction of universal standards. The universal criterion holds that strong forces of attraction, magnetic fields, strong nuclear forces, and weak interacting forces are all interrelated, and emphasizes that all subatomic particles are most likely caused by elementary particles.

The space station flies at an altitude of several hundred kilometers to several million meters above the road, freeing itself from the shackles of the Earth's atmosphere. From here, the sun, moon and stars can be observed, without air reflection, transmission and digestion of the rocks and oaks, and from wind and rain. Therefore, an observatory was built on the space station, where scientists could work for a long time.

This will bring the scientific study of astronomy to a new stage. Tens of millions of Earth** have been photographed over the past 30 years. In the future, if electron-optical, radar and its excellent remote sensing technology instruments are placed on the space station, astronauts can conduct in-depth analysis while standing, solve the obtained data and information, make selections, and remove their dross, which will have a higher advantage than unmanned communication satellites.

The space station travels on a guide rail around the Earth, orbiting the Earth in about an hour and a half. Thus, the space station can monitor climate change, monitor environmental pollution of air and water, detect forest fires, investigate the resources of the earth, control large and medium-sized digital cameras on the space station, accurately photograph the overall military targets on the road surface.

They will use space telescopes to observe changes in the universe, and they will also use the laws of scientific research to understand the dynamics of the universe.

Astronomers observe the universe through space telescopes, through which they can see the light emitted by surprises in the universe.

Use astronomical telescopes, use the eye of the sky, and use the ** sent back by some satellites to observe the universe in this way.

The revolution of the earth is based on the sun as the reference system, and the revolution of the earth refers to the rotation of the earth around the sun according to a certain orbit. Just as the rotation of the earth has its own unique regularity, the rotation of the earth due to the action of the sun's gravitational field and rotation also has its own laws.

The rotation of the earth follows the laws of the earth's orbit, the earth's orbital plane, the yellow-red angle, the period of the earth's revolution, the speed of the earth's revolution and the effect of the earth's revolution. The time it takes for the earth to revolve is one year. There are two distinct cycles in the process of the Earth's revolution, which are the return year and the sidereal year, and the time of the return year is not the same as the sidereal year.

The one-year time difference between the two is called precession.