How big is the universe? What would be outside the universe? Who s going to tell me?

The electric charge is the universe.

Because of this conclusion, they became proponents of the "spherical cosmology".

The age of the universe is about 13.7 billion years, but why is it 156 billion light years? Why is the size of the universe a number you've never heard of?

Their explanation goes like this: the age of the universe is about 13.7 billion years. It takes more than 13 billion years for light to travel from the earliest known galaxies to our Earth.

So we can assume that the radius of the universe is 13.7 billion light years, then the length of the entire universe is twice the radius of the universe, or 27.4 billion light years. But it has been expanding since its creation, and theorists believe that the universe originated at a point of infinite density.

Professor Neil Cornish, an astrophysicist at Montana State University in the United States, explains: "The distance traveled by light in the early universe increased with the expansion of the universe, like compound interest in a bank. He suggested that it is conceivable that the universe was only 1 million years old since its inception.

Light travels through a year, covering a distance of 1 light year. "At that time, the size of the universe was about 1,000 times smaller than it is now, so 1 light-year stretch is now 1,000 light-years," he said.

All distances add up to 78 billion light-years. Light hasn't traveled that far, he said, "but the starting point of the photon that traveled 13.7 billion years to reach our Earth is now 78 billion light-years away." This is the radius of the universe, then the diameter is 156 billion light years.

This is only based on 95% of the time it takes for the light to return, so the actual length of the universe may be a little longer.

According to the theory of parallel universes, there are many universes outside the universe, which are of course very different from ours.

We're on a cosmic membrane right now, and there may be another universe outside the universe, and you can search for baby universes, wormholes.

It seems that the universe is still expanding at this stage, getting bigger and bigger.

Relative to the inside, the outside does not exist.

Outside the universe is a multidimensional space, another universe.

The universe cannot be "infinite".

If the universe were "infinitely large", then the sky would be "infinitely bright" and the temperature would be "infinitely high".

This is not the case, so the universe is not "infinite".

Hubble: "The farthest galaxy ever seen, about 13.7 billion light-years away. Astronomers estimate that there may still be galaxies at 15 billion light-years. There are the boundaries of the universe.

The universe has space, time, and energy. Without space, time, energy, there is nothing. So there is no "outside" in the universe

Some people say: There is another universe outside the universe, and that is not right. Because that universe also has no outside, and it is next to our universe, isn't it the same universe?

Do you think the mathematical view that a straight line is considered to be infinitely long, but the ends of a straight line coincide at infinity? If you dig a little deeper about the universe (space and time, dimensions, etc.), you won't be bothered by the question you asked.

Albert Einstein put forward the idea that the universe is "bounded", that is, the space of the universe is finite, but you cannot find its boundaries. So there is no need to talk about anything outside the universe now, because according to our definition of the universe, all matter, energy, space, and time are all part of the universe.

Here's a very interesting corollary from Hawking's brief history of time.

There can be no infinite universe.

If the universe were infinite, then the light of each star would end on the surface of another perseverance, so that the light emitted by the stars would be as bright as the sun. Even if it is hindered by other non-luminous substances, these substances will be heated until they glow like stars, which in fact does not happen because there is day and night. The only explanation is that there can simply be no universe of infinite size, either in time or space.

Our present universe must have been born in a finite past, and stars must have begun to shine in a finite past. In short, the universe has not reached thermal equilibrium. This is proved by Hubble's discovery, which is the famous universe of the great **.

Albert Einstein described a multidimensional space-time. That is to say, the universe is finite, but there is no boundary, just like the surface of the earth, although it is limited, but there is no boundary, but the surface of the earth is two-dimensional, and the universe is four-dimensional.

The universe is generally about 15 billion light-years in size, but the exact size of the universe is unknown, and it is estimated that there is another universe outside the universe.

The current estimated radius of the universe is 12 billion light energy. Of course, the universe has an outside. It was the kingdom of God's Creator.

Confined to the three-dimensional world of our human cognition, the infinite universe, plus the conceptual four-dimensional, five-dimensional ,......There is no specific conclusion on this! Just like the Buddha's so-called three thousand worlds, but one leaf and one Bodhi! Here three thousand is not a real number, but a title.

The universe is infinite. No one can say what's out there or what's out there.

Now people can only look on the earth with a telescope, how far they can see, who knows how big the universe is and what is out there.