What is the knowledge about the universe, what is the knowledge about the universe?

Knowledge about the universe:

1.In the constellation Aquila, 10,000 light-years away from Earth, there is a cloud of alcohol, 1,000 times the diameter of the solar system. It contains the same amount of ethanol as 400 (400x1024) bottles of beer.

2.About 33 light-years from Earth, the constellation Leo has an exoplanet about the size of Neptune, named Gliese 436b, which takes on a singular state of water and is covered in burning ice.

3.If two pieces of metal come into contact in space, they will fuse into one.

4.The color of the sun is white, and it appears to be yellow, purely because of the Earth's atmosphere.

5.Saturn's average density is only grams of cubic centimeters, which is less dense than water, so it is able to float on the surface of water. The premise is that there must be a large enough body of water.

6.The coldest temperature in the universe, minus degrees Celsius, is absolute zero. At this temperature, the atoms have stopped moving. When the temperature of an object reaches absolute zero, even ice can kill steel in a matter of hardness.

The knowledge of the universe is as follows:1. It has been 13.7 billion years since the birth of the universe.

2. There are only four natural forces.

3. Quantum mechanics integrates three natural forces.

4. The theory of hypergravity, which integrates four forces in 11 dimensional space.

5. Superstrings, which unify all forces and natural laws.

6. All theories are completely invalid at the singularity.

7. The universe is flat.

8. The universe is blazing when it is young and gets colder and colder as it ages.

9. The diameter of the universe is more than 150 billion light-years.

The universe is almost entirely made up of dark energy, dark matter, and ordinary matter. Others include electromagnetic radiation (estimated to account for or close to the total energy of the universe) and antimatter. Over the course of the history of the universe, the proportions of all types of matter and energy have changed.

The observable universe is isotropic on a much larger scale than superclusters, meaning that the statistical properties of the universe are identical in all directions as observed from Earth. The universe is bathed in highly isotropic microwave radiation, equivalent to a thermally equilibrium blackbody spectrum of approximately Kelvin.

The assumption that the large-scale universe is homogeneous and isotropic is known as the cosmological principle. A universe that is both homogeneous and isotropic is the same from all observation points, with no center.

The knowledge of the universe has:

First, the island of Socotra in Yemen is the "most alien-like place" on Earth, because of its long-term geographical isolation, 37% of the plants, 90% of the reptiles and 95% of the snails here are unique to the island.

Second, if the history of the universe is condensed into a year, the Milky Way was born on May 15, life appeared on the earth on September 21, dinosaurs became extinct on December 30, modern humans appeared at 23:52 on December 31, and Columbus discovered America at 23:59:58 on the same day.

Three, if an alien astronomer were to look at the Earth with a telescope 65 million light-years away, he would see the Cretaceous period, he would see dinosaurs and not know that we existed.

Fourth, according to reasonable logic, there must be other life forms in the universe, but there is no evidence of their existence at present, at least no public evidence.

However, we speculate that some planets may harbor life, called habitable exoplanets, and a total of 50 such planets have been found.

Fifth, almost all matter (which is empty. If all the space in the human body is sucked away, the remaining volume of all human beings (all of them, 7 billion people) is the size of a sugar cube.