Road to science and technology

According to the normal world view, it is indeed unreasonable.

But after all, this is a world of cultivation, where the laws of gravity and repulsion are intertwined, leaving aside the issue of large mass collapse.

The reason why we think that the exaggeratedly large Emperor Burial Star is still small is because we have no intuitive understanding of the space and thinness of matter in the universe we live in.

So how thin is the matter in the universe?

If you want to have an intuitive concept of the thinness of the universe, you first need to know the approximate total mass of the universe.

So first starting from the earth, according to M=gr/G, r is the radius of the earth, G is the gravitational constant, m is the mass of the object, and g is the acceleration of gravity, which takes a value of 9.8m/s. Therefore, we can calculate that the mass of the earth is M, which is 5.965x10 to the 24th power kg.

Then through the relationship between mass and volume, we can get that the average density of the earth is 5507.85kg/m, although this method is not very accurate. But it is still possible to calculate the magnitude of the mass of the universe.

We all know that the mass of the sun is 1.9891 times 10 to the power of 30 kg, which is 330,000 times the mass of the earth and accounts for 99.86% of the entire mass of the solar system. There are about 100 billion stars in the Milky Way, so through this calculation, we can roughly know the total mass of a large number of star clusters, nebulae, interstellar gas, and interstellar dust.

According to the Big Bang standard model of the universe, the age of the universe is about 13.82 billion years old, and the diameter of the observable universe is 93 billion light-years. According to the model, the number of galaxies in the entire observable universe is estimated.

If all these galaxies are calculated according to the average mass of the Milky Way, the visible matter mass of the observable universe is on the order of 10 to the 53rd power kg to 10 to the 54th power kg, taking the maximum value.

We only count visible matter, so we do not consider dark matter and dark energy, so we do not need to consider the statement that the mass of the universe is only 28 grams.

Now that we know the total mass of observable matter in the observable universe, we will treat all of this mass as matter and then aggregate it together.

Ignoring the problem of gravitational collapse, assume that these materials are piled together according to the average density of the earth to form a large sphere. Then based on the relationship between the sphere volume formula V=(4/3)πr and the density formula m=ρV, it is not difficult to calculate that the radius of this big sphere is approximately 35127164578329655.88701557915468 meters.

Such a long list of values ​​is dazzling, so when converted into light years, it is 3.71 light years, a sphere with a radius of 3.71 light years.

It is conceivable that the visible matter in the universe is very thin. It is no exaggeration to say that if you drive a spacecraft forward forever without turning or avoiding, you will not hit a star until the end of the universe.

From this perspective, galaxies are not the main body of the universe, but the dark void is.

Then, if the Emperor-Buried Star in the Beidou Starfield is all solid and has a density similar to the Earth, then its diameter of 1.116 light-years would be very exaggerated. It can be said that it gathers the essence of the universe here.

The Buried Emperor Star is well-deserved!

I think this is also the reason why the continental world is not big.

As the Nine-Dragon Coffin quickly fell, Yue Yuanzhou also entered this huge planet. At this time, he looked at the space within the stars, and it looked like it was indeed the case.

"Time and space are impregnable, and the layers of the Emperor's formations protect it. Not bad, not bad. No wonder these monks can fight here to their heart's content."

Obviously, the time and space here have been artificially strengthened, and ordinary attacks cannot. It is not easy to open the time and space channel here, so it is particularly important for the monks here to master a method of the Great Emperor Formation.

Bang!

While Yue Yuanzhou was looking at it, the Jiulong coffin landed on a mountain top like a plane, slid to the cliff for tens of meters and then slowly stopped.

This is a land of towering green mountains and towering ancient trees. There are nine peaks connected to each other among the mountains, forming an extremely huge valley. The valley is shrouded in clouds and mist, and a mysterious aura flows through it. Looking down, it is dark and dark, as if it has penetrated directly through the underworld of hell, which is unfathomable.

Ancient and forbidden land.

"It really looks like a volcanic crater. What if a super cauldron was set up on top? Oh no, it should be a super large radio telescope. The nine peaks can be changed into nine equipment components of the super large radio telescope. Really good." Yue Yuanzhou nodded, turning a blind eye to the strange life-eroding aura here, and secretly expressed his opinion on the terrain.

He let the wine glass disappear digitally in his hand, and was about to stand up, put away the sofa, and leave the place. However, at this moment, an ancient breath suddenly burst out from the depths of the great valley.

Immediately, the air in the valley blew endless turbulence, and the vitality of the heaven and earth surged and transpired, and then a shadow exuding a terrifying aura loomed in the chaotic twilight of the valley.

As the breath flowed, the ancient bronze coffin that had just been cracked was quickly closed with a clang, and then a pair of eyes looking at the past and present looked over.

Cruel person?

Yue Yuanzhou was stunned, wasn't she in the process of transformation? Why did she close the ancient bronze coffin? Everyone in the coffin was starving now. If she didn't let it out, wouldn't they be afraid of starving to death? Is it possible that he wants to do something shameful?

This place is indeed ruthless territory, but what is she going to do?

Yue Yuanzhou simply leaned on the sofa, his eyes showing a quantum superposition state, bypassing all calculation programs and going directly into the microscopic high dimensions according to the rules, overlooking the valley.

At the bottom of the abyss, inside an open ancient stone door, a fairy carved from suet-fat jade sits cross-legged in the chaotic twilight. The white jade is flawless, with black hair hanging down, shining with a soft luster like a star. It is peerless. The face wears a mask that seems to be smiling but not smiling, and also crying but not crying, revealing a pair of eyes that are indifferent and contemptuous of all eternity.

"mortal?!"

After a long time, an eternal voice with some doubts suddenly sounded, like ice that remained unchanged for thousands of years.

But how could it be a mortal? When she pulled the Nine Dragons coffin here, she clearly felt that this guy was sitting leisurely on the dragon's head, and now he was not affected by the life of the ancient forbidden land at all.

However, she did not feel the aura of cultivation in Yue Yuanzhou, as if he was an ordinary person whose sea of ​​suffering has not yet opened, the fountain of life has not yet been completed, and the divine bridge has not yet been raised.

"Do you want to read the legend of a mortal cultivating immortality?" Yue Yuanzhou chuckled, his voice echoing in the valley.

Sure enough, he was not an ordinary person, otherwise how could he transmit the message like this.

But such a fresh and refined answer made the ruthless person fall silent. She didn't know what the legend of a mortal cultivating immortality was, but suddenly she remembered that she had become a Taoist in a mortal body.

"Who are you?" she said.

Well, who am I? Yue Yuanzhou was speechless, but this kind of question reminded him of 'Admiral Xing Daorong', so he suppressed a smile and replied: "Say my name, I'll scare you!"

After spitting out eight words, he stopped talking, and he felt very happy.

"you"

The ruthless man waited for a while, but saw no next sentence. He suddenly frowned slightly, and his displeased voice came out like the abyss of the Nine Netherworld, which was bone-chilling. Could this person be here to amuse himself? ! It's just that it's hard for her to understand that there are such people who don't know how to live or die.