Why do people yearn for the universe? Why is there a universe?

Who said that, I don't want to go, I've been on Earth since I was born, and I don't think it's so much fun, right? Aren't we just in the universe? It's just that the earth has a magnetic field that can't make us fly, in fact, we are already in the universe, is it fun?

The universe was born 13.8 billion years ago with a singularity**, which is the origin and beginning of everything. After the birth of the universe, after a long period of continuous evolution, there was everything in the universe now, the birth of the earth, and the birth of human beings.

According to astronomical observations, there is data that the universe has expanded to a scale of 46 billion light years, but human beings have not yet discovered the edge of the universe.

Characteristics of the universe:

There are a large number of mass objects and objects in the universe, and there is an important parameter here called the "critical density", which is the "equilibrium" point of the universe. This critical density is calculated based on the expansion rate of the universe. If the actual density of the universe is less than the critical density, the universe will continue to expand, and if the actual density of the universe is greater than the critical density, sooner or later the expansion process will stop and contract with it.

Because planets such as the Earth are spherical, stars such as the Sun are spherical, and galaxies of all kinds are also flat disk structures, scientists speculate that the universe is also a flat disk structure such as galaxies, because only in this way can the various celestial bodies in the universe rotate around the same center under the action of gravity.

It must be because the universe has its meaning of existence, just as we all have the meaning of our existence. This may seem like a meaningless question, but it is actually profound, why do you ask? You should also be very aware of the universe.

Because there's time, there's space, and you're on your own.

The universe is a unity of space, time, matter, and energy. It is a synthesis of all space and time. The universe as it is generally understood refers to a continuous system of space-time in which we exist, including all matter, energy, and events in between.

The universe is estimated to be about 20 billion years old according to the large universe model.

And why is there a universe? That is, the so-called big ** theory, simply put, the universe was formed by a fireball ** at the beginning. Modern scientific research has found that the universe is not eternal, but constantly expanding.

The imbalance of the universe was first discovered by a German doctor. When he looked at the stars in the night sky, he found that the distance between the planets was not close to each other because of the gravitational pull. Then, there must be another force between the planets that cancels out the gravitational pull between them.

He hypothesized this phenomenon as the continuous expansion of the universe.

Later, scientists discovered the phenomenon of redshift, that is, the light from distant planets to the earth is mostly red light, and the close distance is dominated by purple light. This shows that the planet is moving away from the Earth. Then Einstein proposed the general theory of relativity, and he proposed the theory that acceleration is not equal to zero, which includes the theory of the expansion of the universe.

In 1931, American astronomers with advanced astronomical telescopes discovered that there are still many Milky Ways outside the Milky Way, and they are constantly expanding, which confirmed the theory of the expansion of the universe. In the 40s, scientists **the universe was created by the large**, so there must be residual matter left in space after it**. The material left behind is the electron wave radiation wave, which represents a temperature of about minus 273 degrees.

This assumption was not proven at the time. In the 60s, scientists at Bell Labs set up antennas for telecommunications research and found that they kept hearing noise, which represented a temperature of about -260 degrees Celsius. At the same time, physicists at Princeton University are also looking for the afterwave of the large ** based on the theory, and later the two groups of working studies jointly said that the noise received by the antenna is the afterwave of the large **, and its temperature is about minus 270 degrees, which confirms the theory of the large **.