"Let's go!!"

Yuan Haochen's command quickly spread to every flying unit of the Second Space City Group. Pen, fun, pavilion www. biquge。 info

I saw that in the vast starry sky, one shining star after another was quickly lit up, which was an activated space city, and it was a bright and magnificent scene formed by the convergence of hundreds of millions of people on the earth.

The Second Space City Group is finally about to set sail and leave the solar system.

401 space cities, plus many frigates, began to accelerate forward in a strict and orderly formation.

The many "stars" in the starry sky began to become brighter, and it was the black hole engine that provided continuous acceleration power to the huge space city, and the whole acceleration process would continue for a long, long time.

It has only been a full decade since the First Space City Group reached its target speed of 0.2 times the speed of light. So, it's been a long and arduous journey for every Space City group.

In this way, a long wandering career of earth civilization began. It is conceivable that during this long journey, many people will die in the vast universe, and many new lives will be born in space cities.

In the interstellar migration project, each Space City Group is like a relay, or like a product on an assembly line, but I don't know how much time the gamma-ray burst will leave for the Earth civilization, and whether the third, fourth, and fifth Space City groups that everyone is looking forward to will finally be able to make it smoothly.

This is indeed the largest interstellar journey ever undertaken by mankind. If you are in the Space City Group, you will definitely be deeply shocked by the scene in front of you.

But the fact is that not to mention the boundless universe or the vast Milky Way, even in the solar system, the entire Second Space City Group is just a drop in the ocean, extremely small.

Therefore, for the vast majority of the time, the entire Space City group can fly freely on the established route without worrying about encountering asteroids or other small particles (pebbles).

The real universe is much more empty than we imagined, and even the asteroid belt, which is densely populated, is actually very empty in the eyes of humans. However, the journey of the Space City Group has not been easy. After all, to sail for a long time at 0.2 times the speed of light, no small omission is allowed.

In order to improve the efficiency and safety of navigation, in addition to each spacecraft, the Central Space City, the hub of the entire Space City group, has a sufficiently powerful space computer and autonomous GNC (navigation) system.

All spacecraft and the City of Space will collect the data to a central computer, which will develop a linked voyage plan for the entire Space City group through efficient calculations and analysis. Each space city also has its own computer system and autonomous GNC (navigation) system. All commands are given at the speed of light through multiple layers of feedback and error correction before being executed to ensure safe navigation.

This set of sufficiently powerful space computer and autonomous GNC (navigation) system is a powerful tool that has been carefully polished by countless scientists for decades, and fully demonstrates the highest level of intelligent space technology of the earth's civilization.

Among them, the dynamic celestial and star simulators, GNC modules, dynamics simulation and environmental simulation modules, and laser velocity and ranging simulators are the pinnacle of human science and technology. It can provide strong technical support for the operation of all spaceships and space cities.

These include:

1. Formation flight and spacecraft swarm technology: maintain the relative formation of multiple aircraft and maintain a cluster mode. Among them, the accuracy of the relative geometric relationship between the aircraft can reach the level from meter to millimeter.

2. On-line GNC technology based on inertial flight, including guidance and control, optimization and path planning technology with high degree of freedom, autonomous guidance, navigation and control system, low propulsion guidance, etc.

3. Relative target positioning and attitude prediction, aviation guidance and control, hazard detection and obstacle avoidance, distributed aircraft swarm control, precise positioning system on planets, etc.

4. Free flight propulsion test platform, free flight flat system based on UAV, etc.

The advancement of the Space City Group is a protracted process.

Due to the slower acceleration of Space City (Space City provides 0.2 m/s acceleration and the acceleration process will last for 10 years), it will take some time to fully fly out of the solar system. Therefore, in this stage, the deep space resource development fleet has been flying forward at a higher speed in advance, to explore and exploit the minerals and energy contained in the stars around the route, as a resource reserve for the Space City Group.

However, when the Space City group leaves the solar system, it is impossible to encounter a rich star like Jupiter again, and the most likely is to target some smaller asteroids.

In the next 30 years, to use a very vivid metaphor, the deep space resource development fleet will run like a puppy in front of and behind its owner (Space City Group).

Similarly, the frigate known as the "Falcon" will send a group of frigates at the front end of the Space City route to act as the eyes of the Space City group and clear the way for it.

When there is no way to bypass (too big an obstacle) or no need to avoid it (too small an obstacle) on the route of the Space City Group, the "Falcon Guardian Fleet" will perform their duty to clear these obstacles in advance (pulling asteroids or boulders out of the established course).

......

If we divide the extent of the solar sheath (the farthest distance reached by the solar wind), the extent of the solar system is about 100 astronomical units (1 astronomical unit is about 150 million kilometers), or 0.0016 light years.

It continued to accelerate for about 140 days (at a speed of 2420 km/s) before the Second Space City Group finally flew out of this range.

Here, the velocity value of the solar wind is already approaching zero. This means that another 130 million earthlings have crossed the heliosphere, bid farewell to the heliosphere, and left their home solar system and entered the vast interstellar space.

Yuan Haochen still clearly remembers that it only took about 9 hours for the pupil of the earth to fly out of the solar system, and it only took him more than ten days to ride the future spaceship.

However, the meaning behind this is not comparable. You must know that the pupil of the earth is only a few kilograms of mass, and the future spacecraft can only carry three astronauts. And each Space City Group has the ability to provide space for the survival and development of more than 100 million people.

For this reason, the central federal government of Space City also deliberately set this important day of leaving the solar system as the New Year's Day of the entire interstellar immigrant human camp. Of course, the calendar on which this New Year's day is based exists only in the earth calendar.

Whether it is in the vast universe or the sand star as a safe haven in the future, the way of calculating time is different......

PS: Weekdays are busy, so the update is late. The second is more likely to be after 12 o'clock, it's too late to test everyone to rest early, thank you for your support. (To be continued.) )