The Problem of Space... About the universe and space

The landlord is wrong, our space is three-dimensional, and our space-time is four-dimensional. That's easy to understand. Man is a three-dimensional animal that lives in a three-dimensional space.

Space is an object of cognition that people decompose and abstract from concrete things. Don't define it specifically.

As for the 11-dimensional universe of M theory, first of all, this theory is not very perfect, and there are many opponents. If you want to understand it, the 11 dimensions here are mathematical dimensions, not specific "spatial dimensions". That is, the universe is determined by 11 different parameters.

This theory is still in a mathematical sense, and its physical and philosophical significance is still very controversial.

According to the M theory (a type of superstring theory) proposed in the 90s, the universe is 11 dimensions and is made up of vibrating planes. For Albert Einstein, the universe is only 4 dimensions (3 dimensions of space and 1 dimension of time), and modern physics believes that there are 7 dimensions of space that we cannot see.

How do scientists explain the difference between the dimensions we already know and those that may exist but are not? They made an analogy: an ant walks on a piece of paper, and it can only walk right or left, forward or backward.

Neither high nor low means to it, which means that the third dimension of space exists, but it is not recognized by ants. In the same way, our world is made up of 4 dimensions (3 spatial dimensions, 1 temporal dimension), but we are not aware of all the other dimensions.

According to physicists, there should also be 7 dimensions. Although there are so many dimensions, these dimensions are invisible, they are wrapped up in each other and are called compressed dimensions. To clarify this view, let's take the example of the ant in our imagination.

We can imagine rolling up the piece of paper on which the ant walks until it forms a cylindrical shape. If an ant walks along the wall of paper, it will eventually return to the starting point, which is an example of a compressed dimension. The above phenomenon also occurs if you can walk along the famous Mebius, of course, it is 3 dimensions, but if you walk along it, you will always return to the starting point.

The Mebius belt is compressed from the perspective of dimensions, according to physics, it has three dimensions, but whoever walks on it can only recognize one dimension of people. It's a bit like the guy on the left: up or down, but never to the end.

If the ant does not walk along the curved wall of the paper tube, it will never return to its original starting point. This is the example of 2 dimensions (or the kind of dimension that we perceive), and if we follow it all the way, it is impossible to return to the original starting point.

The universe sounds boundless and untouchable. With the development of science and technology, we also have a deeper understanding of the universe.

According to the principle of relativity, the stronger the gravitational pull, the slower the time, the person who lives in a bungalow should age a little more slowly than the person who lives in a tall building, but this is only theoretical.

Due to the absence of gravitational force and air resistance, the bullet can fly all the way in space in a vacuum environment, and even fly out of the solar system until it is blocked by the next object.

Scientific studies have shown that dark matter occupies 50% of the universe, and we cannot see anything, which proves that we may not know more than 5% of the universe today.

It has been said that the more humans know, the more ignorant they become. And that's exactly what happened. But we have reason to believe that the progress of science and technology will lead us to a higher human civilization, and we look forward to it together!

It is true that the universe is infinite, and the astronomical community believes that the universe is actually a closed sphere, but it appears to us as a straight line. The moment of the birth of the universe as the center of the universe seems to be very attractive, but there is no going back to the past, which is obviously irrefutable now, and if you consider the bending of time as the cause of gravity entirely, or even think that it is possible to go back in time, then it is worth considering.

And you can't explain whether the curved dimension of space is really the time dimension, because the curved space must also occur in the space dimension, not in the time dimension (it will not be the past and the future for you to shuttle), so you don't have a foothold in the beginning. Three-dimensional space should be bent in higher latitudes, that is, "hyperspace", and we cannot feel hyperspace because we are not hyperspace creatures.

Three-dimensional space can be disassembled into two or two perpendicular planes, if each of them is bent, then there will be 3 more latitudes, this is the dimension of hyperspace, if you add the dimension of time, then there are a total of 7 dimensions, so the discussion of the curvature of space-time is actually discussed from this height. It doesn't make sense for you to explain the bending of 3 dimensions in terms of time in 1 dimension.

The bending of space will make the surrounding objects approach the source of gravity, so it gives us the feeling of gravitational force, and it is precisely because of the bending of space that the light passing in the gravitational field is bent, and when the gravitational field is so strong that the bending of light is so strong that it cannot return to the outer universe at all, a black hole is created.

And in your imagination, the speed of time is related to the concavity of space-time, which is true, but the problem is that you seem to regard time as a length, how much time to concave to stop, you don't say it explicitly, and whether this is comparable with the long river of cosmic time of tens of billions of years is also a big question, if the radius of this ball is 10 billion years, then how to concave enough? And you should have no objection to the fact that black holes with different masses have different depths, but the problem is that this contradicts your ideas. Moreover, if you enter a black hole, you will definitely die.

Then he talks about the increase in the mass of an object due to velocity, which is really just different measurements of the same thing in different frames of reference, which has little to do with space-time.

With the spaceship one, all I can say is that it's really just a fantasy with no scientific basis.

The question could be called 'science fiction', where you can let your imagination run wild.

Some scientists have put forward the idea that the universe is like bubbles in boiling water, and each bubble is a universe, and there are bubbles in bubbles, and bubbles keep getting bigger and disappearing, and bubbles will touch and disappear, and we will touch and disappear or intersect, and we are on the bubble membrane, and in fact, the universe has 11 dimensions.

If one day you strayed into a multidimensional space, and afterwards you described your strange feelings to other humans incoherently, you should be considered insane.

The "two-dimensional worm" who lives on a piece of paper is thrown out of the paper one day, and the witnesses are shocked by the same kind and himself, oh my God! What exactly happened, so wonderful. But they can't put it into account with what they already know.

Your mind is very confused, what do you think is space?

At present, the most cutting-edge cosmic physics studies the relationship between the microscopic and the macroscopic. What Planck scale, m-theory, 4-dimensional membrane world. Many based on experiments + conjectures, there is no conclusion, and even what matter waves are still being questioned, and various new theories are emerging one after another.

No one here can give you an answer, in other words, you are right to think whatever you want. But if you want to take your understanding to the next level, you still have to learn a lot, and these things can't be understood by reading a few **fantasy for a few days. It is recommended that you read A Brief History of Time and the Universe in the Shell, and your questions about space will be answered in it.

What I understand: the universe we live in now is a space, this space does not know how big it is, and we don't know if there is a boundary, we can only assume now....

The universe is very large, but there may be more space, and while we are developing, other universes are being created, and when our universe is facing destruction, we can only get out of here....

For a long time, our thinking about the universe has been empty by Westerners, and when they say east, we think eastward! Even the answers given by our astronomers are very old, very old foreign theories! Sad, you still go and see that article, he is indeed the original of a Chinese, "A Chinese Space New Theory Black Hole New Says Maya Prophecy New Theory" just don't know if there is more, it is a blog post!

He finally said that he knew a way to go to another space, but he didn't say it, he said that he was afraid of being applied to the military, hehe, it would really be the end of the world.

The universe is like a soap bubble (within our horizon), the universe we know is only one of many soap bubbles, and no one knows about other soap bubbles, before, that is, 15 billion years ago, this soap bubble was full of energy, there was no matter, due to the coalescence of energy, it produced matter (energy - the conversion of matter), and now matter is also converting towards energy (have you ever seen energy converted into matter?). No, when all of them are converted into energy, there will be a big ** again, and the cycle will start again, and the same story is happening with other soap bubbles, but we don't know it, and the universe we know (and only within the horizon) is only in.

This bubble is inside.

This is an emerging theory, and you might be a little happier to listen to.

The P-membrane is composed of 10-dimensional space and 1-dimensional time, and the universe we live in is on one of the countless infinitely extended P-membranes, and the formation of our universe is produced by a collision between the P-membrane we are in and the adjacent P-membrane, and it is that collision that causes the space in the collision area of the P-membrane where we are located to begin to expand to the surroundings and produce matter with powerful energy.

The p-membrane theory is an extension of superstring theory.

What is the difference between electrons moving around the nucleus and the Earth moving around the sun?!So, there are some methods of dantian that are not alchemy (but refining wheels), such as the sevenfold chakra of Tantra and the ten chakras of Zen

The space of the universe is vast, and we can only say that it is bounded and infinite. No one knows how long the universe will expand. Although the current theory can be roughly **, the wonder of nature is not something that human beings can fully grasp!

The uncertainty principle of quantum mechanics confirms this truth.

Hello owner, there are about 5 billion extragalactic galaxies that have been discovered so far, plus our own Milky Way, collectively known as total galaxies, which represents all the cosmic ranges that human beings have come into contact with. But the universe itself is infinite and expanding, so there should be an infinite number of extragalactic galaxies that we don't yet know. There is no exact number of how many galaxies there are in the universe, some say more than 80 billion, some say more than 100 billion, some say 1000 200 billion.

In 1995, astronomers used the Hubble Space Telescope to observe outer space in the north and estimated that there are about 80 billion galaxies in the universe. Three years later, in October 1998, observations were made in outer space in the south, and the number of galaxies in the universe was estimated to be 125 billion.

The reason why the figures for the two observations differ so much, explained by Harry Furguson of the American Space Telescope Science Institute, is due to the fact that the observation distance of outer space in the south is greater than that of outer space in the north.

From this, we can know that there are more galaxies in the universe than 125 billion, because the Hubble Space Telescope does not see the edge of the universe.

The Milky Way is the galaxy to which the Earth and the Sun belong. Because of the bright band projected on the celestial sphere by its main part, it is called the Milky Way by our country. There are more than 200 billion stars in the Milky Way.

The Milky Way looks like a large disk with a slightly bulging center, with a diameter of about 100,000 light-years, and the Sun is located at the center of the Milky Way. The drum is a silver heart is a dense area of perseverance, so it looks at a white expanse. The Milky Way looks like a giant whirlpool with four spiral arms.

The solar system is located in one of the spiral arms (the Orion arm) and rotates counterclockwise (it takes 100 million years for the Sun to revolve around the galactic core).

However, with the exception of the fourth question, there are generally no answers, and there is no possibility of an answer at this time.

I know you'll be curious. But sometimes it's important to learn a little bit about this before you ask a question.

The answer is immeasurable right now.

4.There is only one star in the solar system, and there are 8 large planets, 1 dwarf planet, and countless asteroids.

Since human beings currently observe all the means by which visible light and X-ray radio can be observed and imaged, it has been discovered that the universe is within the celestial sphere centered on the earth, and there is no boundary in any direction.

When a very small area of the sky is magnified, it is terrifying, and the screen is full of galaxies.

Therefore, there are so many galaxies in the universe that humans can observe that they cannot be counted.

The largest galaxy currently observed by mankind is about the same as the Andromeda Galaxy, which is 20 light years large and contains 400 billion stars.

It is twice the size of the Milky Way and almost twice as large as the number of stars.

Let's talk about exoplanets.

This is not visible through visible light. Because even if the nearest Sirius is 4 light-years away from Earth, its planet will not be visible, because the star's light is too intense. All extraterrestrial planets are through the transit phenomenon, that is, when humans observe the star through a telescope, its planet happens to pass through the lens, and even then it cannot be seen, and only the light emitted by the star can be found to have very small fluctuations in the instrument, that is, the decrease and increase of light, and the exoplanet can be discovered by such means.

There are about 200 billion stars in the Milky Way.

There are nine planets in the solar system, and excluding the outermost one, it is too small, not to count, there are only 8.