Video spoilers history, starting with the blitzkrieg on Poland

And about the end of the universe.

The sky continued to tell the story.

[Although the universe has fallen into absolute darkness. ]

[But in fact, the universe is still moving and is still expanding at an accelerated rate driven by dark energy. ]

[The remaining cosmic matter is constantly being expanded.]

[The galaxies throughout the universe will also fall apart, until finally, all the atoms in the universe will be torn apart.]

[Entropy increase will also reach a maximum value that cannot go any further. ]

[Only at this point can we declare that our universe has reached its true end.]

[Both at the thermodynamic level and at the physics level. ]

【The universe no longer exists.】

【However, Nobel Prize winner Penrose proposed a new concept. He believes that the universe may be a continuous cycle of reincarnation. 】

[The Big Bang that gave birth to the universe is the starting point of this universe. ]

[It is also the end point of the previous cycle of the universe. ]

[Although the universe is expanding at an accelerating rate, this accelerated expansion will not continue forever. ]

[As the universe continues to expand and its density increases, the universe will change from accelerating expansion to decelerating expansion, and finally stop expanding. ]

[After a certain critical point, the universe will begin to collapse under the influence of gravity. ]

[We know that the universe is expanding at an accelerating rate, and the speed of expansion exceeds the speed of light.]

[Those celestial bodies are constantly moving away from the Earth, and the possibility of contact with the Earth has been lost forever.]

【But according to the theory of space exploration. 】

[When the universe begins to be explored, all galaxies in the universe will begin to approach the Earth as seen from the Earth.]

[The density of matter in the universe will continue to increase. ]

[Galaxies were squeezed together and collided with each other, once again producing large numbers of stars.]

[In the end, all matter in the universe will continue to collapse and eventually be compressed into a cosmic singularity. ]

[At this time, the cosmic singularity will usher in a new round of Big Bang. ]

At this time, the sky curtain also provided a simulated model of the universe.

As can be seen from the model.

The universe began as a tiny dot.

Expands into a wide bottle.

Then the bottle gradually shrank and became a small dot again, and then turned into a wide bottle...

This cycle goes back and forth.

[At this stage, most celestial bodies in the universe are moving away from the earth at speeds exceeding the speed of light as the universe expands.]

[The light they emit will never reach the earth.]

【Thus, it loses any meaning to the earth. 】

[But if the universe really collapses in the future, these galaxies will become meaningful to the Earth.]

[The light they emit may reach the earth again.]

[Alien civilizations living in those galaxies will also get closer and closer to the Earth. ]

[When the universe really collapses, we will probably receive many radio signals in the universe.]

【This is because the distance between galaxies is getting closer and closer. 】

[But that process will take tens of billions, or even hundreds of trillions of years.]

【This is too long for us humans. 】

[Even the most advanced Hubble and Webb telescopes can only observe the universe as it was tens or hundreds of billions of years ago.]

[For humans, they will never be able to see the current real-time situation of the universe. ]

[But we can only see the universe as it was billions or tens of billions of years ago. ]

This creates a possibility.

[That is, although we humans see the universe, it seems to be still in a state of vigorous vitality. ]

[But in fact, somewhere in the universe, vacuum decay may have already begun, and the entire universe is disintegrating at the speed of light.]

[However, even if the universe has already begun to destroy and disintegrate, the process that can easily take hundreds of billions of years may not have much significance for human civilization.]

The sky-screen video ended in speculation.

Netizens also fired barrages. "The universe is so awesome! Even gods are insignificant in front of the universe."

What is the meaning of 1000 trillion years?

"By that time I was no longer even air."

"I'm afraid there won't be any air at that time!"

"Why should I watch this meaningless video?"

"I make 3000 yuan a month, but I can't fall asleep without watching this kind of video every night. "

《I can’t sleep because of anxiety.》

"It's really worrying. After 1000 trillion years, my grave will be blown up."

《Is this true? Is the universe's finale so hopeless? 》

"It won't be confirmed anyway, so astronomers can make whatever guesses they want."

"I want to know what's outside the universe."

"It's speechless to spend 100 years worrying about things that will happen 1000 trillion years later."

"It's good, I love watching it. I love worrying about the universe. Universe, please don't die! How can I live if you die? Woo woo woo!"

……

Han Dynasty.

Although Liu Bang knew nothing about astronomy.

I also know that it’s not my turn to worry about it.

But I also found it very enjoyable to watch.

It's like watching a great show.

Seeing the excitement, Liu Bang couldn't help but drink a glass of wine.

“I don’t know when the universe will end.”

"What if all of us humans were wiped out by then?"

“Will humans leave any remains?”

"If humans still leave relics, will the Han Dynasty be among them? Will they leave relics of their own civilization?"

"I know the universe will end."

"But I just want to leave traces of the Han Dynasty's existence even after billions of years."

Liu Bang was thinking about inheritance.

And in the Song Dynasty.

Song Huizong followed the lens of the sky and painted a picture of the universe in his mind.

"The four directions and the up and down are called Yu, and the past is called Zhou."

"This is the universe in my mind!"

"And given that the universe is infinite, theoretically, our Earth could be the center of the universe."

"And the center of the earth is the Song Dynasty."

"The center of the Song Dynasty is me."

While painting, Song Huizong also discussed philosophical issues.

And in the Ming Dynasty.

What Zhu Di wanted was to fly.

"Except for the Manchu Tartars of later generations, our Ming Dynasty is the dynasty closest to later generations."

“And now there is the foreshadowing of the sky.”

"The special military operation against the Jurchens is almost ready and can be launched today."

"As long as the Ming Dynasty will not be replaced by the Jurchens, it will definitely continue to exist in the future."

"When the Ming Dynasty reaches the space age in the future, it must produce the best spacecraft in the world."

"The thirty-fifth year of Hongwu!"

Ancient people from different eras watched the same cosmic astronomy video.

But have different ideas and thoughts.

Perhaps this is the unique charm of the cosmic video. (End of this chapter)