Information about the Earth, the Solar System, the Milky Way, the Universe

Andromeda Galaxy, dwarf galaxy. IC 1101, NGC 2207, IC 2163, these are other galaxies that I know of.

The Andromeda Galaxy, the Canis Galaxy, the Small Magellanic Galaxy, the Large Magellanic Galaxy, these galaxies are all I know.

In addition to the Milky Way, there is also the Andromeda Galaxy, but the Milky Way is the most familiar to us.

Human beings have gone from ignorance of the universe to cognition in dialogue, in fact, it has gone through tens of thousands of years! It is only in the last few hundred years that we have made real discoveries, and there have even been fights, bloodsheds, and sacrifices for this, and finally we have chosen the right path: science.

Therefore, the universe is like an onion, every moment is a thin layer of onion skin, and we humans live on onion skin!

There may be some larger galaxies or planets outside the universe, there may be other planets, there may be black holes, there may be other organisms, there may be other galaxies, there may be other worlds, and the current scientific and technological forces are impossible to explore outside the universe, so we don't know what is outside the universe.

The Earth belongs to the solar system (a planet).

1. The Sun is an ordinary star in the Milky Way, and the Earth is a planet in the Solar System. There are many planets in the universe that are bigger than the Earth, more spectacular than the Earth, but we still haven't found it, and you must know that the solar system is very small in the whole universe.

2. The Earth's atmosphere is mainly composed of nitrogen and oxygen. The tropics receive more solar energy than the polar regions and redistribute it through atmospheric and oceanic circulation. Greenhouse gases also play an important role in regulating the surface temperature.

The climate of a region is determined not only by latitude but also by factors such as altitude and proximity to the region and the ocean. Severe weather such as tropical cyclones, thunderstorms, and heat waves often occur in a wide area, which has a great impact on the rise and fall of life.

3. The Earth's gravitational pull interacts with other objects in space, especially the Moon, which is the Earth's only natural satellite. It takes about a few days for the Earth to revolve around the Sun. The Earth's axis of rotation is tilted relative to its orbital plane, thus producing seasons on Earth.

The gravitational interaction between the Earth and the Moon causes tides that stabilize the direction of the Earth on its axis and gradually slow down its rotation. The earth is the home of human beings living together, and there is only one earth for human beings.

The so-called "universe" in Chinese means "the sum of time and space": universe refers to space, and universe refers to time. How big is the universe, and how big is space? How long?

There is currently no universal answer to this question. Personally, I tend to the Buddhist view that space is boundless, and time has no beginning and no end. This is so because several other speculations are currently problematic.

Speculation 1: Hawking's claim of the big ** theory. At present, there are two important facts that do not match this speculation.

First, the observable radius of the universe has exceeded 90 billion light years, while the diameter of the universe deduced according to Hawking's theory is less than 20 billion years (Earth years, not even light years). This error is too large, and it can be used as the basis for the falsification of the big ** theory. The second is the phenomenon of the opposite motion of the Andromeda Galaxy and the Milky Way.

If the theory of the great ** is true, then all the matter in the universe should spread in all directions with the ** center as the origin. That is, all galaxies should be farther and farther away from each other. Of course, it cannot be ruled out that the trajectory of individual matter may deviate from the diffusion process, but it should not occur on such a large scale as galaxies.

I believe that with the continuous improvement of human observation capabilities, the opposite movement between galaxies will continue to be discovered, and the big hypothesis can be put to rest!

Speculation 2: Bounded infinity. That is, the universe has boundaries, but the boundaries are not visible to observers within the universe, and therefore infinite to these observers.

This hypothesis sounds more plausible than the ** theory, at least for the time being, there is no direct evidence to falsify it. My reasoning is that physical phenomena should be uniform in the universe, that is, physical phenomena should be the same everywhere on the scale of the universe. If the universe had boundaries, the physical phenomena near the boundaries should be significantly different from those elsewhere.

And, if the boundary does exist, then the difference should be found at any point in the universe in any direction. Personally, I believe that this phenomenon will not occur. That is, the universe has no boundaries.

The Earth exists in the Milky Way, and the Milky Way exists in the universe, and there may still be a big universe outside the universe, and the universe may be just a small planet in it.

Some scientists have come up with different speculations1Outside the universe are an infinite number of universes2The outside of the universe is empty, and all other worlds come from parallel worlds. 3.The universe is actually a living organism, and the planet is a cell.