I don t know how big the universe is????

The current radius of the universe is about 46.5 billion light-years, with a diameter of 93 billion light-years. However, 93 billion light-years is only the diameter of the universe that we can observe, and since the universe is expanding faster than the speed of light, we cannot know how big the universe really is if we only observe the universe from Earth, which is still an unsolved mystery.

How big is the universe? Star Awareness Project

Today's state-of-the-art telescopes don't see the edge of the universe, and, scientists say, the universe is constantly expanding.

The universe is "finite and boundless", it is without edges, just like the earth, it is finite, but without edges, because it is round, even if your speed becomes the speed of light, it is only in circles, the universe and the earth are the same, they are also round, so it has no edges.

How big is the universe? Star Awareness Project

How big is the universe? Star Awareness Project

According to the latest observations, the farthest galaxy that has been observed from us is 13.7 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 13.7 billion years to reach Earth. This distance of 13.7 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 with a radius of 13.7 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.

Therefore, the universe has no boundaries, and our observation ability determines how far we can see, and our observation ability is developing, and the scope of observation is also increasing. However, according to the theory of the universe, the universe is still expanding.

The vast universe is boundless, and its depth is unimaginable, In April 1999, an astronomical research team at the State University of New York in the United States used"Hubble"The immense power of space telescopes. After more than 2 years of careful observation and scientific processing with electronic computers, more than 400 images of celestial objects overlapping in this direction were eliminated"Please"One of the oldest galaxies has emerged, and from the fact that it regresses and expands at the speed of light, it should be at the edge of the universe at 13.7 billion light-years!

The distance of 13.7 billion light-years is incomparable, and even the fastest light would have to travel 13.7 billion years to reach it. It can be seen that this farthest galaxy is also a celestial body shortly after the universe, and it is extremely precious and ancient"Cosmic fossils"Because in exploring the origin and evolution of the universe, the early history of the universe will be of immeasurable significance.

The universe is not infinite, or rather, the narrow universe we live in is not infinite. Its boundaries are still debated in what form they exist, but the idea that "our universe" is not infinite has been largely agreed.

Now there is an argument that space-time is distorted at the edge of the universe, meaning that you can get infinitely close to it, but you can't reach it.

As for the universe in a broad sense, that is, whether the universe outside "our universe" is infinite, this is not clear, just as it is impossible to talk to Xia Worm, the current human science and technology have no understanding of this, and the current research has not yet broken through the scope of our universe.

The universe is infinite, but it is bounded. Hawking's understanding of the universe is like a basketball, you can't find a beginning and an end on the surface, but it is bounded. It's like a lot of astronomy books are covered in it, if you look at Stephen.

Or it can be obtained from the big ** theory that our universe is still expanding, and galaxies are still regressing from each other, that is, the universe we know is still expanding, extending, and expanding, but it has not yet reached its end.

How big is the universe? Star Awareness Project

There is no definitive answer to this question yet.

The theory of the universe is that the universe was created about 13.8 billion years ago. If the theory of the universe is correct, then the universe must have a definite range (or size). Therefore, it is believed that the radius of the visible universe is about 13.8 billion light-years.

But this is not the case, because over the past 100 years, physicists have repeatedly proven that the universe is expanding at an accelerated rate, so the radius of the universe must be greater than 13.8 billion light-years.

In 2003, some physicists in the United States, taking into account the expansion of the universe and other variables, came up with an observable radius of about 100 million light-years. In other words, the diameter of the universe is about 46 billion light-years. That's the size of the universe.

However, due to the limitations of the age of the universe, the expansion of the universe, observation technology, etc., we can only see about 12 billion 13 billion light-years away, and we can't see anything farther.

How big is the universe? Star Awareness Project

I believe that the universe should be boundless, beginningless, and infinite, so there is no such thing as a boundary problem. The universe already contains everything, and there is no question of internal or external, origin and extinction at all. The universe is infinite in space and has no beginning or end in time.

No matter which direction you go in, it should be endless and endless, and it cannot be blocked by anything, which is the infinite cosmic space. I think it's absurd to think that the universe is boundary, and if the universe is boundary, what is that margin? Is there no beyond the margins?

And since there are edges means that there will be edges, this question is actually difficult to justify, how can people who say that the universe has an end explain it? The only thing that makes sense is that the universe is infinite and infinite! The universe is mainly composed of infinite space, and the infinite space exists there for eternity, how can there be a question of formation and disappearance?

Matter in the universe can only be in an infinite cycle, endless and endless. It can be said that the infinite universe is indeed unimaginable to us, and it has long been beyond the scope of human cognition! The mysteries of the universe are endless, and so is the understanding and exploration of the universe by human beings!

This is the universe, a mystery that mankind will never be able to solve!

Strictly speaking, the theory of the universe itself is a hypothesis that is difficult to prove, and there are still many doubts that are difficult to justify. Therefore, it is difficult to say whether the universe has really happened, for example, the so-called singularity is a very absurd singularity, how big is this singularity? How long has it been around?

Why all of a sudden? I'm afraid no one can say, including the author of the theory. Therefore, the great theory of the universe is not perfect and cannot convince all people, so why take it too seriously!

The latest science suggests that there may be multiple in the universe, and that there are large round spots on the microwave background radiation. and concentric circles, suggesting that it may be the result of a collision of multiple universes, or it may be a trace of a cosmic cycle. Our present universe is the existing time domain.

The initial conditions at the beginning of the universe were different, resulting in a different structure of space-time. How big the universe is is not as much as how long the universe can exist.

He can be as old as you want.