Voyage of the Stars

As time went by, humans set sail and stopped to resupply, and then continued to sail after resupplying. Gradually, humans finally discovered that the distance between the stars ahead was getting smaller and smaller, and the density of the stars was getting larger and larger. Seeing this situation, everyone realized that human civilization was about to truly enter the main category of the Perseus Arm.

Even the closest route between the two arms is nearly 5,000 light years away. Because of the need for resupply, humans cannot go in a straight line. Adding the time for resupply, the time spent on the journey is actually more than 500 years.

After arriving at the main body of the Perseus Arm, humans cannot stop, and must continue to follow the original route. It will take about 2,000 light years to reach the real star field in the star map.

During the hundreds of years across the spiral arm, humans are not only on the road, but also scientific research activities, academic research and other work have never stopped. However, because large-scale scientific experiments are not suitable during the warp period, the research progress of many disciplines is not great.

But even so, time has allowed humans to consolidate their technological achievements for the promotion to the fourth-level civilization. For example, in terms of gravity potential well technology, humans have carried out several rounds of iterations, and the results of technological iterations have also been updated to their own creations. The equipment in the floor of the Lyra has undergone a round of updates.

Finally, after completing a certain voyage, humans truly set foot on the Perseus Arm, a vast arm of stars.

Humans have completed the feat of cross-arm navigation, which is undoubtedly something that can be recorded in the annals of human history. The member civilizations of the Star Alliance also feel extremely proud of this because they have also personally participated in this great voyage.

There are four major spiral arms in the Milky Way, the Perseus Arm is one of them, and the Orion Arm is just a small branch of the Sagittarius-Carina Arm.

As a large spiral arm, the Perseus Arm naturally has more stars than the Orion Arm. The larger the number of stars, the greater the probability of civilization. Humans have come to a wider place.

From the star map, the location where humans cross from the Orion Arm to the Perseus Arm belongs to the second half of the Perseus Arm. Towards the center of the Milky Way is the Orion Arm, then the Sagittarius-Carina Arm, the Southern Cross Arm, and then the Recoil Arm and then the Milky Way's core. The density of stars there is very high, and it can be said that there are many stars, but the environment is also relatively harsh.

From the location where humans are located, after crossing the Perseus Arm itself, it is the end of the Recoil Arm. Going outward is the vast void. If you have the ability to sail far, you can go outward and leave the Milky Way. And after the end of the Recoil Arm, there is actually a spiral arm formed by the gathering of stars. From the observation data, it is an extension of the end of the Recoil Arm, but humans call it the outer spiral arm.

The extension of the outer spiral arm spans most of the outer edge of the Milky Way, and is more than 100,000 light years from beginning to end. It belongs to the sparse star-gathering star field outside the Milky Way disk. This area can also be called the outer edge of the Milky Way. The stars here are usually not counted into the diameter range of the Milky Way because it is too sparse. From the human perspective, it is like a vast nebula, with a feeling of mist and thick clouds.

Therefore, if the extension area of ​​the outer spiral arm is also counted, the diameter of the Milky Way is actually more than 100,000 light years.

It is based on the observation of the outer spiral arm extension star field that humans have discovered that the rotation speed inside and outside the Milky Way is not the same, which proves the indirect evidence of the invisible and intangible dark matter. It can be said that the outer arm extension star field of the square ruler spiral arm has greatly helped the development of human scientific theories.

Unfortunately, humans currently have no ability to go to the extension star field of the outer arm, because the span of the void space between it and the Milky Way disk is too large, and it is impossible for the fourth-level civilization navigation technology to reach it. The void span is on the scale of 10,000 light years, and only the fifth-level and sixth-level civilizations can go there. According to the Milky Way star map drawn after many years of observation, the shortest route to the extended star field of the outer arm is to pass through the end of the Perseus spiral arm.

The Milky Way is so vast that it can accommodate countless civilizations and give birth to countless civilizations. At the same time, it can also cover up the traces of most civilizations, so that in the eyes of many civilizations, the Milky Way is a lonely place without any traces of civilization.

The vast scale hides everything, and at the same time, the vast scale is also protecting the breeding of one primitive civilization after another and protecting the growth of one low-level civilization after another.

Human beings are one of the lucky ones. Although they encountered an unexpected disaster on the eve of reaching the first-level civilization, they also had the opportunity to escape and thrive because of the protection of the vast galaxy.

The vast galaxy is like a double-edged sword. It is not only the biggest obstacle to the communication between civilizations, but also a natural barrier to protect weak civilizations.

Just like today's human beings, if they do not personally send out probes to detect planets in the target star system, they will not be able to find out whether there is an intelligent civilization inside the star on the scale of the interstellar.

Perhaps this is one of the reasons why humans have traveled thousands of light years from the Orion Arm to the Perseus Arm, but have not discovered other civilizations. Perhaps a civilization is in a star near the human route, but no one has discovered each other.

It is better not to discover it. Humans are now focused on going to the small universe left by the pioneers, and naturally do not want to cause trouble. Therefore, when arranging the civilizations of the Star Alliance to explore the safety of the route, they did not let them go to the star system outside the route.

In this way, after humans arrived at the Perseus Arm, they did not waste too much time. After completing the supply, they continued to embark on the last two thousand light-year star journey, aiming directly at the location shown on the star map.

This is the last stroke of the "博" route. After completing this journey, they will reach their destination.

There is no difference between sailing in the Perseus Arm and sailing in the Orion Arm. They sail at warp speed, replenish materials to make antimatter fuel, and then continue to travel. And during this long journey, because they did not encounter any alien civilizations, humans also spent a rare leisure time.

When they came to the new star field, for the sake of safety and the concealment of their own routes, humans did not use star destroyers to blow up planets and mine like they did when sailing in the Orion Arm. After all, that was too conspicuous. If other civilizations discovered traces of bombing planets, they could completely follow the clues to find the human route and thus find the destination of this trip.

Therefore, after leaving the star system of the two satellites blown up by the unknown civilization, humans have been using traditional mining methods to reduce the probability of exposing the route.

Hiding oneself has become one of the means for human survival. Even after reaching the fourth level of civilization, humans still have not forgotten to be cautious.