The Universe ... What is the Vast Universe?

The word "universe" probably originated from the famous ancient philosopher Mozi (about 468-376 BC). He used "universe" to refer to the east, west, south, and north, and the space in all directions, and "Zhou" to refer to the time of the past and the present. Past, present, or future; Is it a recognized, or an unrecognized......In short, everything is everything.

From a philosophical point of view. It is believed that the universe has no beginning and no end, and that it is boundless. However, we are not going to go deep into this esoteric concept, and we will leave it to philosophers to study.

We might as well zoom out a little and talk about the universe that can be understood and observed using the science and technology available to us, which people call "our universe" or "total galaxy".

According to the latest observations, the farthest galaxy that has been observed from us is 13 billion light-years. That is, if a beam of light is emitted from the galaxy at a speed of 300,000 kilometers per second, it will take 13 billion years to reach Earth. This distance of 13 billion light-years is the extent of the universe as we know it today.

To be clear, the extent of the universe as we know it today, or size, is a spherical space centered on the Earth and radiated by a distance of 13 billion light-years. Of course, the Earth is not really the center of the universe, and the universe is not necessarily a sphere, but we can only understand this extent due to our current observation capabilities.

In this spherical space with a radius of 13 billion light-years, about 125 billion galaxies have been discovered and observed, and each galaxy has hundreds to trillions of stars like the Sun. So with a simple math problem, it's not hard to see how many stars there are in the universe that we've observed. In such a vast universe, the earth is really like a drop in the ocean, so small that it is insignificant.

The size of all things in heaven and earth varies greatly, from the huge solar system to the vast Milky Way, all the way to the vast universe; Molecules and atoms are extremely small. From the incredibly large to the incredibly small, the size of everything in the universe is vastly different. Generally refers to the sky, the sea, and the like.

It's vast, and many of them describe a lot of water. The universe should be boundless, or boundless. Before the 20s of the last century, everyone thought that the universe was basically in a steady state, golden years, and constant.

Then we found out that the universe was expanding. The distant galaxies have been flying away from us, which means they must have been close to each other. If we extrapolate, we must have all been stacked on top of each other about 15 billion years ago.

Exactly"Thunderbolt Big**"—The Beginning of the Universe. But is there anything before the big **? If not, what created the universe?

Why did the universe emerge from the thunderbolt? In the past, we all thought that cosmology could be divided into two parts, the first being the laws. Like "Maxwell's equations".'and "general relativity", which determines the evolution of the universe by setting the state of the entire space-time at the same moment.

The second is the question of the rudimentary shape of the universe. Under extreme conditions, general relativity and quantum theory allow "time" to operate like another dimension of "space". This will be the "time."

Nullity" is removed, i.e. the law of evolution can also determine the initial state. The universe can be created from immutable and self-created!

The vast universe means that the universe is so big that it has never been able to find its edge. It is said that the universe is boundless. So it's the vastness of the universe.

The vast universe means the infinite universe, and it means that the universe is incomparably huge and has no end.

The vast universe is all the starry sky that we know and don't know. Hope it helps.

The vast universe means that the universe is large and has no boundaries.

The Vast Universe: The vast and boundless universe.

In the universe we live in, there are trillions of planets, and there are tens of billions of hearts, and in this space, it is possible for human beings to be relatively small or the smallest existence. After all, the universe is huge, and what we are exploring now is only one of the galaxies, and we are still trying to explore the solar system of a light year. There are always some secrets in the universe that we don't know, so what is the most mysterious thing in the vast universe?

The answer is as follows. <>

1. There are unknown living beings. First of all, the first point is that there will definitely be some unknown life forms, and the composition of these life forms is absolutely large in our human imagination. There may be some of these rocks or machines that come from silicon and so on, and the life that is made up of blood cells is not like humans, and the two are very different.

We may only be detailed in science fiction movies about the composition of these beings from beginning to end, so the composition of these beings is arguably the most mysterious thing in the entire universe, including the flesh and blood of human beings. <>

2. Black holes in the universe. Secondly, there is another mysterious thing in the universe, which is black holes. The black hole was discovered by the American Curiosity, when it was discovered, it was a very large existence about the black hole, it can absorb any matter around it, including light, can not escape its capture, so about the other end of the black hole, now many scientists are trying to explore, but also boldly imagine what the black hole is composed of.

3. On the formation of the universe. The last point is also the most mysterious, that is, about the formation of the universe, some scientists have made scientific explorations, and found that the universe is formed by a large **, which is a singularity of material and energy inside, which triggers the violent movement of the entire space, resulting in **, which becomes the universe now.

In the vast universe, the most mysterious thing belongs to the black hole in the universe, because the black hole has been absorbing the matter of the universe since its appearance, and there is no way to get close to the black hole until now.

In the vast universe, the most mysterious things should be those unknown life forms, or how the universe was formed, and those black holes.

Dark matter, according to the law of conservation of mass, everything in the world should have the existence of dark matter. Many countries are now looking for dark matter, including China. But it has always existed in theory, and it has not been observed in reality.

The most mysterious substance in the universe, dark matter.

The most mysterious thing is black holes.

The universe is bigger than we can imagine, and the number of planets in the universe is more than the sand on the earth combined, trillions.

It can be said that the earth can simply ignore its existence in the universe, but it is on such a tiny planet that life was miraculously born, and in the process of the evolution of life, a highly intelligent species such as human beings has evolved, which has to be said to be the stroke of genius in the universe.

Throughout the history of mankind, from the slave society to the modern highly civilized scientific and technological society, it can be said that it is a history of war and replacement. In the barbaric historical process, there is no equality between people, and the noble and poor seem to have a destiny long ago, and in order to compete for power and profit, they can ignore human life. All of this is just driven by the desires of some people, and behind their trampling on life is actually to gain a sense of existence, to get self-satisfaction, and to prove their strength in front of the world.

But how many people have fallen prey to this desire?

There is a saying in China: A family has ** ten thousand taels, but three meals a day, and a family has ten thousand hectares of fertile land, but only sleeps in a three-foot bed. Therefore, even if a person has more, it is nothing more than that, and he can't escape the last place to go, the ancient saying "between the world and the world, like a white horse passing through a gap, suddenly."

So, try to do something beneficial during your lifetime.

A person must always remember his own insignificance, so that he will not be arrogant, only by knowing his own insignificance will he know his own shortcomings, and can he feel that he has a sense of existence in this universe.

Although modern society is an era of peace, war is still a relatively distant thing for us, we should also feel lucky, we can also talk about interests and dreams without worrying about food and clothing, but if we are born in the era of continuous war, we may have become a skeleton on the battlefield, and the reason why we are so lucky is because of the progress of mankind and the strength of the motherland.

The struggle between man and nature has never stopped from ancient times to the present, should we choose to coexist with nature, or should we destroy nature to satisfy our human desires? Small human beings are not enough to compete with nature, although now science and technology are advancing day by day, but think about it, the increasingly severe natural disasters in recent years directly prove the power of nature, we human beings are so fragile and small in front of it. Human beings must be kind to nature and coexist in harmony with nature in order to become stronger, knowing that life cannot exist without the natural world.

Human beings are insignificant, and the earth is a grain of sand in the universe, but nature is great, and the universe is vast.

Compared to the vast universe, the earth is small.

The meaning of small in this sentence is: the universe is very large, and the earth is very small, very small, and insignificant.

The earth is "insignificant", and from this sentence we understand that "size is a relative concept, and the results of comparison will be very different depending on the reference".

To be small is to be small.