Seeing that it was safe for the time being, Wang Wuyun took the opportunity to chat with the three of them after resting for a while, and asked some questions in his heart.

Seeing that Wang Wuyun didn't understand anything, the three of them introduced a lot of things to Wang Wuyun one by one.

After the three of them said this, Wang Wuyun realized that the universe he was in, this galaxy, was completely different from the information he was instilled on the earth, this universe was far more wonderful and more vibrant than he imagined, just this galaxy, there are countless planets with intelligent life, and these planets with intelligent life have also created and developed various civilization systems.

The civilization system created by intelligent life in the universe is generally only divided into five levels, from low to high, they are biosphere civilization, planetary civilization, stellar civilization, star field civilization, and galaxy-level civilization.

The current level of civilization on the earth is only the lowest biosphere civilization in the universe.

The civilization of the universe has different levels of development stage, take the earth as an example, in the earth's tribal age, the Stone Age and the Bronze Age, etc., all belong to the early stage of biosphere civilization, with the invention and application of gunpowder, steam engines and electricity, human beings have entered the middle stage of biosphere civilization, and at this stage, human beings have further developed nuclear energy, networks, quantum technology, space exploration technology, etc., which is the later stage of biosphere civilization.

As an important feature of biosphere civilization, people on the earth can only live in a biosphere like the earth, and cannot leave the earth.

If the transition of the later stage of the biosphere civilization is successfully completed, then in the future, the earth will inevitably form a unified government, the state form within the earth and the wars between countries will be eliminated, and the earth will enter a planetary civilization, ushering in a period of rapid development.

But the evolution of civilization can not only keep moving forward, smooth sailing, just like people will fall, civilizations on different planets, in the process of evolution and progress at different stages, will also disintegrate and collapse and regress, low-level civilization can evolve into high-level civilization, and at the same time, high-level civilization will also regress and collapse into low-level civilization, or even completely destroyed.

And if the earth can enter the planetary civilization in the future and eliminate the wars of the internal countries, the entire earth will usher in an unprecedented period of prosperity and development without wars and wars, and it is possible to establish colonies on some planets and obtain resources from other planets, this unprecedented period of prosperity is called "the dawn of planetary civilization" in the entire universe.

The great prosperity and development brought by the planetary-level civilization will lay the foundation for the planetary-level civilization to move forward to a higher civilization, and if the future earth can conquer the entire solar system and establish colonies on different planets in the solar system, and the human beings on the earth can freely migrate on different planets in the solar system, then the civilization that originated on the earth will enter the era of stellar civilization.

Stellar-level civilization is a huge hurdle in the process of civilization, civilization has developed to this extent, and the state form that has long been eliminated in the planetary civilization stage may reappear, and countries on different planets may oppose each other, or even war, and the entire civilization is also facing the possibility of regression and extinction.

Ninety-nine percent of the civilizations in the universe will eventually stop at stellar civilizations, stagnate for many years in this civilization stage, and even break out into war and collapse and degenerate again.

The most important feature of the star civilization is that it has the ability to fly out of the solar system, carry out primary interstellar navigation and colonize across the solar system, and a star civilization will control dozens or even thousands of planets and the solar system.

The sphere of influence of the galaxy-level civilization will be hundreds of thousands or even hundreds of millions of solar systems, covering trillions or even tens of trillions of light years at every turn, and hundreds of millions of stars are under the control and control of the galaxy-level civilization like the sea in the starry sky.

The galaxy-level civilization is the apex of the cosmic civilization, and at this apex, the most essential composition of the universe and life will be explored, and the brilliance and development of the galactic civilization are unimaginable for low-level civilizations.

In the entire galaxy, between hundreds of millions of stars, there are two forces that can reach the galactic level civilization, the empire and the alliance!

The empire is the Galactic Empire, and the real full name of the Galactic Empire is the Dayu Empire, because the territory covered by the Dayu Empire is the most extensive in the galaxy, and it is the only galaxy-level civilization empire in the galaxy, so everyone is used to calling it the Galactic Empire.

The alliance is the abbreviation of the Ten Thousand Sects Alliance, the so-called Ten Thousand Sects Alliance, which is an alliance formed by the union of countless sects, which control countless planets and galaxies, as opposed to the Dayu Empire.

These two galaxy-level civilizations have vast territories, and their galaxy planets are calculated in hundreds of millions, and they are the masters of hundreds of millions of stars in the galaxy.

In the universe, the advanced stage of the same civilization level can easily defeat the low-level stage, and the crushing of the cross-civilization level, not to mention, is completely equivalent to the use of atomic bombs to eliminate primitive people, in this state, the conquest and crushing of the civilization level and the level of the planet and race is forbidden in the universe, whether it is the Galactic Empire or the Wanzong Alliance, such a thing is prohibited.

For high-level civilizations, low-level civilizations can observe, have limited appropriate contact, and even choose to cultivate agents behind the scenes to control and compete, but they will never allow the use of atomic bombs to destroy primitive people, which is the most strict cosmic ecological law.

It is impossible for an elephant to make it his own achievement to trample on an ant!

There is no conquest in the universe that transcends the level of civilization! However, under the same stage of civilization, the intermediate level conquers the lower level, and the higher level conquers the intermediate level.

Therefore, under the cosmic law of civilization, the scene of the alien fleet coming to the solar system to conquer and destroy the earth with black technology and terrorist weapons can only appear in science fiction movies, at least, before the civilization on the earth develops beyond the earth system and reaches the stellar civilization, it is impossible to have large-scale public contact with the same or high-level civilization in the universe.

However, private contact is very common and will not be forbidden, many high-level civilizations will look for elites and agents in low-level civilizations, and some elites on planets that are still in the early stage of biosphere civilization may have been in contact with people from galaxy-level or star-level civilizations, and this contact has given birth to many religions and myths.

The Great Yu Empire and the Wanzong Alliance in the galaxy are generally of equal strength, although the two have not completely broken out into war, but they are also in an antagonistic relationship to some extent, I heard that N 10,000 years ago, the Wanzong Alliance was split from the Dayu Empire.

According to the three of them, there are about 400 billion suns in the Milky Way, and around each sun, there is a certain probability that there will be a planet with intelligent life, just like there will be fish in a pond in the wild, which is the normal state of the universe.

Therefore, the Milky Way, which has more than 400 billion suns, has about 40 billion planets with life, and there will be about one planet with life in every ten solar systems on average, and the forms of life are diverse.

Among the more than 40 billion planets and galaxies with life in the Milky Way, there are nearly 400 million planets with a civilization level above the star field, and the Galactic Empire and the Wanzong Alliance each occupy half of these more than 400 million highly developed civilization planets, that is, about 200 million each.

These numbers are truly astronomical for Wang Wuyun, Wang Wuyun was speechless when he heard it, what is the concept of a galaxy-level civilization that has more than 200 million planets that are N times more advanced than the earth?

Wang Wuyun assumed that he could travel everywhere in the universe and visit one planet a day, even if he could live for 10,000 years, he would only be able to visit 3.65 million planets, which was really insignificant compared to the number of more than 200 million, and according to the speed at which he visited the planets, unless he could live for more than 500,000 years, it would be possible to visit the inhabited planets within the territory of the Dayu Empire. And these planets don't include those resource planets.

Such an empire and power have exceeded Wang Wuyun's imagination, and those great sects in the universe that can be compared to such an empire have mastered countless starry skies, which is also an existence that Wang Wuyun cannot imagine.