This interstellar cloud, also known as Local_Fluff, is an interstellar cloud on the spiral arm of Orion in the Milky Way, and it is important to know that about 90% of the total mass of the entire Milky Way is occupied by large and small stars, and about 10% of the mass exists in the form of dust and interstellar clouds. Pen | fun | pavilion www. ｂｉｑｕｇｅ。 ｉｎｆｏ

This interstellar cloud is the interstellar cloud where the solar system is currently located, about 30 light-years in size, the solar system entered this interstellar cloud more than 100,000 years ago, and will continue to operate in it for 10,000 to 20,000 years, or even longer. Its density is low, at only 0.26 atoms per cubic centimeter, which is about one-fifth of the average density of interstellar matter within the Milky Way.

The local bubble, also known as the local bubble, is a hole between the interstellar matter on Orion's spiral arm, which spans a larger range than the local interstellar cloud, about 300 light-years, and the hot local bubble diffuses gas that emits X-rays, containing only one-tenth of the normal value of neutral hydrogen per unit volume. And our solar system has been traveling through this bubble for at least three million years!

Most astronomers believe that the bubble was formed by a supernova explosion between hundreds of thousands and millions of years ago, when the sudden "violent death" of a supermassive star pushed away the gas and dust of the interstellar matter, leaving behind hot and low-density material.

A more conjectural observation is the supernova remnant Geminga in the constellation Gemini.

For Zhou Chen and them, whether it is this interstellar cloud or this galaxy bubble, it is not very safe at this time, the reason is that this interstellar cloud is too narrow, and the distance of 30 light years is easy to be detected by the Otto civilization, and the existence of this galaxy bubble is a huge hole, in this hole, it is difficult for the earth civilization to achieve real concealment.

Therefore, leaving the local interstellar cloud and the local galaxy bubble as soon as possible and finding other places with better background cover is the top priority of the earth's civilization.

As for where to go, Zhou Chen and the others have not yet reached a conclusion.

Speaking of the universe, it is so huge, but where is the place where civilization can really develop with peace of mind?

A safe place lacks resources, and a place rich in resources is a troubled place that faces the threat of other civilizations, which is a more difficult contradiction.

And the earth civilization is obviously not like the Blue Horse Consortium, the latter's accumulation of science and technology has reached a certain level, and after obtaining the remains of the fourth-level civilization, he chose to go to a remote area to complete the promotion.

Of course, it would be okay if the Earth Civilization chose to go to the periphery like the Blue Horse Consortium, but in this way, it would be equivalent to the Earth Civilization taking the initiative to give up the opportunity to improve and be willing to become a wandering civilization content with the status quo.

Zhou Chen and the others knew that if they wanted to be truly safe, they had to be promoted to a fourth-level civilization as soon as possible, and the only way to advance to a fourth-level civilization was to roam the entire universe!

The development of science and technology by human beings is actually derived from the understanding of reality, and there is no place to show the reality of the world more than the vastness of the universe.

In the process of roaming, we observe all kinds of wonderful phenomena buried in the world, so as to draw new theoretical speculations and constantly improve and strengthen our own theoretical framework.

Although this belongs to the empiricism of Bacon's philosophy, the counter-example proves that what we see with our own eyes does not necessarily restore the essence of the world completely.

In contrast to Descartes' dogmatism, which believed that scientists only had to stay at home and think to deduce the laws of nature, Bacon's empiricism did not lock scientific progress within the existing framework from the beginning.

Realistic exploration, coupled with various in-depth theoretical experiments, is the most effective way to promote the rapid development of a civilization.

The Blue Horse Consortium can go to the fringe, because they have received the legacy of the Myers civilization and have enough technology accumulation, and after they advance, they still have to come back to snatch the chassis.

But what about the civilization of the earth? If they also go to the fringes, are they going to stay there forever, or are they going to come back too?

Staying there forever is certainly a good idea, unless you can find an extremely remote place that other civilizations can't find, otherwise this cosmic society of the jungle will one day die out. But there is no place in the universe that will always be at ease, and there will always be other civilizations that will find it.

And if you come back, what capital will have a chance to survive?

At the end of the day, how can remote places inspire people's minds when they lose so many opportunities to appreciate the diversity of the universe?

The law of survival tells people that the universe hates the weak, and if they fall behind, they will be beaten, and if they don't have enough foundation, they will be eliminated, so the only way to really protect themselves is to constantly improve themselves.

Of course, Zhou Chen and the others were unwilling to sit still, so the idea of going to a remote area was rejected at the first time.

Since they don't go to the edge and leave this galaxy bubble at the same time, then purely from the novelty of roaming the universe, Zhou Chen actually has a lot of places to go, and finally after some thinking, Zhou Chen finally decided to choose the Orion Great Nebula, the Aquila Nebula and the Likana Nebula.

Located 1,500 light-years away, 7,000 light-years and 9,000 light-years away from the Neptune Galaxy, these three nebulae are also very easy to spot.

However, they are too far away from here, and of course the Earth civilization cannot go to these three destinations in such a hurry, and must first plan a safe enough passage!

And before the official departure, Zhou Chen and they had to go to Tianyuan 4 again, Tianyuan 4 used to be the place where the Blue Horse Consortium was stationed, and this time the Blue Horse Consortium set sail to the outer edge of the Orion Spiral Arm, but there were still a lot of valuable things left there.

Guluo had told Zhou Chen before that if the earth civilization needed it, he could go over and receive what they left behind.

Coincidentally, when the Earth Fleet left the solar system, it sent an expedition fleet to Tianyuan IV, although the Blue Horse Consortium had been stationed in Tianyuan IV, but because the Earth Fleet had let the research spacecraft enter a dormant state after discovering the Poseidon Galaxy, the Blue Horse Consortium did not find an expedition spacecraft in a dormant state.

Not long ago, Zhou Chen woke up the dormant expedition spacecraft through remote control, and after some detection of Tianyuan Si, they did find a lot of treasures left behind by the Blue Horse Consortium!

These treasures include various types of processing plants and engineering robots that are not conducive to long-distance voyages, which may not be useful to the Blue Horse Consortium, but the civilization of the earth can obtain a large number of advanced manufacturing processes from them!

The Earth civilization obviously did not intend to give up contact with this thing that could bring great benefits to itself, so before going to the Orion Nebula, they had to make a trip to Tianyuan Siyi.

……

In the year 287 of the new calendar, the chaos of the Poseidon Galaxy has reached the point where it can be seen with the naked eye.

In the dead of night, people only need to raise their heads and look at the vast night sky, and they can see the distant planets across the sky, those larger than the full moon, or red or blue in the sky, it is a very unforgettable scene.

As early as a year ago, Zhou Chen and the others already clearly knew that the destruction of the Poseidon Galaxy was imminent, and at that time, the Supreme Council of Earth Civilization issued a mobilization order for all evacuation.

Since then, the earth civilization has begun to retract the work, and a staging area has been set up in an open area close to the habitable zone, and the civilization circle fleet and the central fleet of the earth civilization have begun to converge continuously, and now they have been fully assembled.

I saw that in the huge space, with the Tianlong as the core, the seven phalanxes of the civilization circle were arranged up and down, left and right, front and back, and in the middle, and the scale of tens of thousands of large ships seemed to be mighty.

And outside the phalanx of the civilization circle, the nine legions belonging to the Central Fleet firmly guarded the four sides of the civilization circle, which was a huge combat ship with a total of more than 300,000 scales, densely packed without leaving any dead ends, among which two continent-class warships were at the forefront of the entire phalanx, and they were arranged on the left and right, opening the way for the entire phalanx.

"Speaker, the concealment function of the Poseidon Galaxy has been completely lost, and the passage has been opened!" The technician in charge of observing the situation of the passage reported.

Zhou Chen nodded, looked at the stars that suddenly appeared in front of him, his eyes narrowed slightly, and he ordered: "All ships, set sail!" Target - Tianyuan Four! ”

As the order was given, long tail flames continued to erupt, and the huge ship group began to move.

The speed of the Earth Civilization ships is getting faster and faster, and the Tianhe Star and Tianyao Star behind them are constantly moving away, and finally even the Poseidon Galaxy is also moving away.

When Zhou Chen and the others returned to the outer universe, they vaguely seemed to hear the explosion sound of a collision of stars coming from inside the Poseidon Galaxy.

It has turned into purgatory, a vast resource-based star system that is on the verge of chaos and death!