What's further afield? Is it the boundary of the universe?

Oh, what are you talking about, the borders of the universe? No kidding, how can the universe have borders?!

Of course the universe has boundaries!

Whether it is the 21st century or the interstellar 100,000 years, the universe in which it is located is a three-dimensional universe, and 666 comes from a high-dimensional universe.

As for Jiwei, Lan Yiyu still doesn't know. She thought, maybe four or five dimensions?

In addition to multidimensional universes, there are also multiverses, which are also known as parallel universes.

A parallel universe is a universe that separates from a certain universe, which is the same as the original universe but not the same. The two universes may have the same planet, the same species, the same history, but perhaps different timelines.

Maybe you in this universe are now old and dead, or maybe the species in this universe have long been extinct and the culture has long since disappeared; But in the parallel universe, you are still young, the species still exists, and the culture is still being passed on.

The two universes never intersect.

Lan Ruyu thought that in the parallel universe, she should be a super-rich man with countless wealthy men. Well, it doesn't need to be the same at this point.

Lan Ruyu let herself float everywhere, and by the way, her thinking diverged, and she already thought of her happy life after becoming rich.

Floating and floating, Lan Qiyu, who didn't look at the road, felt as if she had hit something.

What is it? At first glance, it is a wall. A translucent wall.

Although it was translucent, Lan Ruyu couldn't see what was outside the wall, and only darkness was reflected in his eyes.

Lan Qiyu's surroundings were almost dark, and when he reached out and touched this wall, it was soft and extremely tough.

No matter how hard she tried, she couldn't pierce it.

And this wall is impenetrable to the living beings and matter of the entire universe, probably, this can be understood as the boundary of the universe.

Where there is a boundary, there is naturally a center.

After drifting for an unknown amount of time, Lan Ruyu finally remembered the final task of this field training - where is the center of the universe.

Where is the center of the universe?

At a certain point? On some celestial body? Or at the singularity of this universe?

Lan Qiyu was thinking about these questions, and couldn't help but think of the origin of the universe, the "Big Bang Cosmology".

The universe was formed by the expansion of a dense and hot singularity after the explosion 138 years ago, and during the 13.8 billion years, the universe is still expanding, expanding all the time, and with the accelerated expansion of the universe, the distance between the major planets and major galaxies and other celestial systems is getting larger and larger.

Perhaps, the center of the Big Bang is the center of the universe.

So, where was the center of the Big Bang?

Lan Qiyu thought about it and began to subconsciously pick at her braincase, although she is now in a simulated soul state and has no physical object, but this does not stop her from thinking about problems and loving to buckle her braincase. After all, it is impossible for her to buckle her feet, because that will not affect well.

She's an internet celebrity lord with idol baggage!

The center of the Big Bang? How does she know? The universe has not been explored by one in a billion, and the hell knows where the center of the Big Bang is?!

No, isn't her current state a so-called "ghost"?!

Lan Ruyu really tried hard to recall the little knowledge she knew about the universe, and she should be glad that she was in a soul state now, otherwise she would have to buckle off a piece of her scalp.

"Think about it now, think about it when you get stuck."

After singing this sentence to himself, Lan Yiyu said that he couldn't remember the following lyrics!

Suddenly, in her mind, she grabbed something! Oh! She remembered!

Don't let go of clues, like a super detective?!

Well, she remembered.

One day, when she was watching the news with Panpan, a federal report said that in the observable universe, the expansion image is the same from different locations. 8090

That is, any point is the center of the universe, and it can be said that the universe has no center at all!

In daily life, the explosion of an object starts from a point, and the explosion spreads from the point to the surrounding areas. This was not the case with the Big Bang.

Although it is called an explosion, it is not an explosion in the known sense.

The Big Bang of the universe is the expansion of space-time, which is carried out in a state of nothingness, and only after the expansion explosion does it produce time, space and all celestial matter in the universe.

Starting from scratch, the current universe has been formed after 13.8 billion years of continuous expansion.

Therefore, the universe can be singularity everywhere, that is, the universe has no center.

"The universe is everywhere with a center, and the universe has no center." This view is naturally based on the fact that the singularity exploded to form this universe, this three-dimensional universe.

For the three-dimensional universe, everything starts from the explosion and expansion of the singularity, but for the four-dimensional universe, because it is a higher dimension, the singularity really exists in the four-dimensional space.

Then, the center of this three-dimensional universe exists in the four-dimensional universe.

Lan Ruyu thought about it and went around, and her brain was probably full of paste by now.

"No matter, fill in a four-dimensional universe and run away!"

She wanted to go home and sleep, she was tired of it, she was old, and she couldn't stand the toss.

She is now even considering taking a leave of absence after this year, and she doesn't want to come to the next year's field training.

As soon as his mind moved, Lan Niyu returned to the original room, Lan Niyu opened the terminal, began to connect to Yigao's special LAN on this planet, and logged in to his student number to start answering questions.

[Q: Where is the center of the universe that the universe simulation system should simulate?] 】

The next line of small print - 2999 people have answered the question.

Ah, more than 2,000 people have already answered the question...

Lan Qiyu thought about it again and again, but still filled it in.

[Lan Siyu: Four-dimensional universe. ] clicked "OK".

[Submitted, enter the review within one minute.] 】

Lan Ruyu rubbed her hands nervously, looked at the progress on the screen in front of her, and watched the circle spin around there.

It made her panic.

[Reviewed, congratulations to the Special Admissions College - Lan Siyu for completing the task in the Ephemeris 100002 Field Training!] 】

Before Lan Qiyu could be happy, the surrounding space changed instantly.

She's back in the water!

Looking around, there was no one except for some aquatic plants and aquatic beasts.

Lan Qiyu swam up quickly, although I don't know where this is, but it's always right to swim up. She didn't want to run into those big, horrible and ugly monsters.

Within half an hour, Lan Ruyu came out of the water.

Looking around, Lan Ruyu found that he couldn't see the land at all......

O sea, you are full of water!

Lan Qiyu didn't know which way to swim now.

Take a round object from the terminal, press the button on it, and throw it into the water.

The round object began to grow in size, and after a few minutes, it turned into a bowl-shaped hovercraft capable of carrying one person, and Lan Qiyu staggered up to it.

As soon as you climb up, you are paralyzed on all fours.

"I'm tired of my mother!"

Lan Ruyu looked at the blue sky in a daze.