Why is it the same when you look at the universe from the earth?

Looking at the universe from the earth, no matter how you look at it, it is the same, first of all, because the universe is too vast, and the stars that humans see from the earth are glowing stars, and there are so many stars that you can't count them, no matter how you look at it, the universe at night is just countless small bright spots, and there is no difference; The second is that the distance between the stars and the Earth is very far, although the stars themselves are also moving, so due to the long distance, there is no change in their position from the Earth, so the universe is the same.

Because the position of the earth has hardly changed relative to the vast universe, the universe is the same when viewed from the earth.

I think it's because it's so far away and we have very limited what we can see with the naked eye.

The universe is 30 million kilometers away from where humans live, and it is impossible to see the universe, and the blue sky is caused by the sky reflecting the sea.

You can see it at night, the sun is too bright, so you don't see it, it is the common knowledge of guessing things, and the general education subject should be taught.

Because the universe is too far away from me.

I can't see my earth with the naked eye, and the earth has an atmosphere.

Originally, the sky was rainbow and colorful.

But my eyes have a reflex.

The universe == the upper and lower four directions are the universe.

Traveling between the past and the present is the universe; That is, between heaven and earth. According to the interpretation of the universe.

We know that between heaven and earth.

When it's sunny.

Humans are poor clairvoyant and can only see the blue stratosphere.

But when it comes to clouds or black clouds, it is full of ants; There is nothing that can be done. So if you want to probe or probe the mysteries of the universe.

This can only be done with high-tech astronomical telescopes or rocket-propelled space exploration ships or instruments.

Reference: What you have seen and heard.

Why don't we look at the sky from the earth to the sky, but the blue sky? The mind sees the universe with its eyes.

See the blue sky with the naked eye.

The Earth is just one planet in the universe, and the universe contains countless planets.

How big is the universe? No one can answer this question, only to say that it is very big, the ancients believed that the sky was round and the earth was square. Ever since we humans invented the astronomical telescope, we have discovered that the universe is so big.

The earth we live on is like a tiny speck of dust in the universe.

The scope of the universe is a bit larger, and the differences between space and the universe are:

1. The scope is different: the universe is the general term for all things, and it is the unity of time and space. Space refers to the cosmic space outside the earth's atmosphere, and the entire space outside the atmospheric space, mainly referring to space.

2. The hierarchy is different: the universe has a hierarchical structure, for example, planets, asteroids, comets and meteoroids all orbit around the central celestial body, the Sun, forming the solar system. Space does not use the term hierarchy.

3. The state is different: the universe is a constantly expanding celestial system, and the universe evolved from a very dense and extremely high primordial state before a limited time in the past, and has reached today's state through continuous expansion. Some studies suggest that the diameter of the universe can reach 92 billion light-years or more.

Space only changes with the expansion of the universe, for example, the temperature is constantly decreasing, and space has become a cold environment, with an average temperature of sub-zero.

According to the common sense of the universe that human beings have grasped, it is true that as the subject said, there are about 100 billion galaxies in the universe, which is the value that human beings have budgeted through the Hubble telescope, and the diameter of the universe is about 92 billion light years, and superstitious people think that it will be even larger. This is also the approximate value calculated by human beings through the current level of science and technology, but it does not mean that human beings' understanding of the universe has reached the limit. At present, mankind's research on the universe is still in its embryonic stage, and the superstitious community is also diligently deepening the understanding of the universe.

How big is the universe? Does the universe have an edge? Can parallel universes exist?

Or the multiverse? Is there a "second Earth" in the universe? Are there aliens?

The answer to all all kinds of questions about the universe is a hypothesis before mankind loses its superstitious verification. You can say you have it, and you can say you don't. Indeed, according to the subject, why does the earth have life?

This is the real trouble that human beings can see and touch.

Our earth has existed in the solar system for about 4.6 billion years, and the life of the earth has evolved from complex to redundant through several generations and a long time before it reached our human beings today.

The universe is infinite. You know how big the Earth is. If the universe is nthen the earth is 1

If the universe is the earth, the earth can only be regarded as an ant!!

There is no known planet that is almost identical to Earth.

To migrate to a celestial body suitable for long-term human habitation, the following conditions need to be met.

First of all, there must be the protection of the atmosphere. If the exoplanet's atmosphere is too dense or too thin, it will be difficult for human cardiopulmonary function to bear. Atmospheric composition is also important.

The main components of the Earth's atmosphere are oxygen and nitrogen, and they must conform to a certain proportion. If the oxygen content is too high, intoxicated oxygen will occur, and if it is too low, it will cause hypoxia. The ozone layer is also indispensable, and without it, the probability of human cancer will be greatly increased.

Secondly, there should be liquid water and the right temperature. Water is the source of life, and according to the experience of the earth, life cannot exist without water. However, the existing methods cannot confirm whether there is liquid water on the exoplanet, and the temperature on the planet can only be estimated according to the distance between the exoplanet and the star, and whether the existence of liquid water is allowed can be inferred according to the temperature range.

Third, habitable exoplanets must have a rocky surface that allows humans to continue living on land; Such planets should have a perfect magnetic field shielding them from high-energy charged particles from stars and interstellar sources; Planets must evolve to a middle-aged stage with a relatively moderate release of internal energy so that there will be no violent **, tsunamis, and volcanic eruptions.

Finally, the planetary system where exoplanets are located has evolved to an advanced stage, and a large number of small celestial debris has been accretted by large planets, and the interplanetary space has gradually cleared, thus greatly reducing the probability of being hit by small celestial bodies. The energy release of stars is relatively stable, otherwise humans can only sit and wait in the face of the super charged particle storm that erupts from the stars.

In short, exoplanets themselves do not emit light and are difficult to observe directly near distant, very bright stars. The search for exoplanets is mostly judged by the perturbation of stars during the planet's orbit. So far, there is no means of observation to determine whether exoplanets have rocky surfaces, liquid water, magnetic fields, and oxygen in the atmosphere, and it is even more difficult to confirm whether exoplanets are truly similar to Earth's environment.

The universe was originally the size of a point, and it expanded once 13 billion years ago, forming the current boundless universe. The Earth is left over from the early days of the formation of the solar system.

Interstellar dust. The convergence formed the first Earth.

It's really not a good question.

In fact, to answer this question, we must first understand how the universe came to be, why it came that way, and what is outside the universe? How did the Earth come to be, and how did the Earth become one of the very few planets in the universe where life exists? If you understand this, the landlord will probably have a certain understanding of the problems he has heard!

1. Let's talk about the universe first.

In fact, what is beyond the universe is not known to us humans from the scientific knowledge we have now. I saw a book the other day that we can only detect about 12 billion light-years away and the age of the universe is about 13.7 billion light-years, so that is, if we can detect 13.7 billion light-years away, then we can see what the world was 13.7 billion light-years ago. And now the most workers' argument is that the universe was created by the big **, this question is unfounded, and we have nothing to discuss.

2. As for how the universe came into being, why there are unique environments and creatures. Here I would like to recommend the landlord to watch a cartoon "Theatrical version of Doraemon-Nobita's history of space development", I think this cartoon will tell the landlord everything he wants to know!

In fact, everything in the universe was in a very small point.

We call it the singularity.

The singularity density approaches infinity.

At a certain moment.

Singularity**. The substance inside flew out.

Forming the universe today.

That includes the Earth.

Looking at the universe from all directions of the earth, why is it the same everywhere? The Earth seems to be the center of the universe！It's actually a magical question.

The universe behaves the same on a large scale in all directions. This certainly defies common sense. Here's an analysis of the problem.

First of all, we must understand how the big ** theory is formed

If we were to observe the universe from all directions with the most powerful telescope to date, there would be tens of thousands of galaxies located tens of billions of light-years away everywhere we looked. At the largest scales, space looks essentially the same, with the same density, temperature, star and galaxy types, and the same elemental abundance everywhere. The only difference is that the farther we look, the younger the object we see, and the faster we can move away from ourselves!

How do we understand that the universe is uniform and flat in all directions? And why this is counterintuitive

There's a problem here. Over the past 13.8 billion years, the universe has expanded according to the rules of general relativity, which means that the rate of expansion of space is determined by some initial conditions, but also on the energy content of the entire universe (normal matter, dark matter, radiation, neutrinos, dark energy, space curvature, etc.). )

There is nothing wrong with any of this, but the problem is that the universe as we see it is all equal and flat!

The horizon of the universe is actually the same as that of a black hole. We simply can't observe what's happening within the horizon of events. Thus, inflation theory is actually a pure theory that is not supported by observational data, but it does address these issues elegantly and reasonably.

You can think it's right or wrong. But until there is a better explanation, let's believe it for a moment. After all, inflation theory can give you a good answer.

That's why the universe is the same everywhere and in any direction.

I think the reason why this kind of thing happened is the magical side of the universe.

This is because the universe exists like a starry sky, so no matter how you look at it, it's almost the same.

This is because the universe itself is like this, so it's the same everywhere.

This is because the earth is round, and the earth is always rotating, so everything you see is the same.