Leah smiled: "Senior, this is the outer defensive fortress of the Capital Star, here is still about fifteen light hours away from the Capital Star, and then we must fly at sub-light speed for thirty hours to reach the Capital Star!"

Yang Lin nodded, the distance of fifteen lights is even farther than Pluto from the sun, and the constellation Lyra α can still show such intense visible light radiation, so you can imagine why this star (33 times the size of the sun) is so bright in space.

Crossing the Lyra Civilization Capital Star Defense Circle, some artificial celestial bodies can be seen from time to time during the next voyage.

Military large battle fortresses, industrial planets, residential planets, and so on.

The diameter of these planets is at least more than 2,000 kilometers, and the largest has reached more than 10,000 kilometers in diameter, and there are even some resource stars transferred from other galaxies.

Compared to these big men, the New Earth, where humans live, is simply a small spaceship that can't be smaller.

From this, one can imagine how profound the foundation of the fifth-level civilization is.

According to Leah, within a light-light radius with the constellation Lyra α as the core, there are more than 10,000 celestial bodies with a diameter of more than 2,000 kilometers, of which 90% are artificial objects and the remaining 10% are resource stars.

Most of these resource planets were Jupiter-like and ice giants that the Lyra civilization painstakingly collected from a radius of hundreds of light years α Lyra, and more than 99% of the material on these planets is composed of hydrogen and helium, from which they extract hydrogen and helium, and at the same time synthesize various heavy elements through nuclear fusion reactions. These heavy elements are then used as raw materials to synthesize materials to ensure the supply of materials in the capital star field.

In the star field, the capital of the Tianqin civilization, there are also more than 50 trillion people, accounting for one-twentieth of the total population of the Tianqin civilization.

Among them, the parent planet, Phoenix, has a population of less than one billion, and the rest are distributed in large and small artificial celestial bodies.

In this regard, although Chen Xin was silent on the surface. But deep down, the evaluation of the Lyra civilization is one level higher.

Thirty hours of flight time passed quickly.

When Leah called Chen Xin out of the lounge again, the Princess was already less than 20 million kilometers away from the Phoenix Star.

However, when Chen Xin came to the command center, through the porthole, he saw not a phoenix star, but a brown dwarf star with a diameter much larger than Jupiter.

A brown dwarf is a star with a similar composition. But the mass is not large enough to ignite a gaseous object that reacts with fusion in the core. Its mass is between the star and the planet. It is a celestial body between the smallest star and the largest planet.

The brown dwarf, which Lea called Hero, is about five times the diameter of Jupiter and almost half the size of the Sun, but only five percent of the mass of the Sun, a deep red surface, and about ten astronomical units from α the constellation Lyra.

Herro is the god of war in the myths and legends of the Lyra, so you can imagine its place in the hearts of the Lyra.

Due to the sheer volume of Lyra's α, Herro is subjected to a larger stellar wind than Jupiter in the solar system. At its north and south poles, two circles of brilliant aurora made up of a deep blue halo can be seen.

In addition to the triggers of the solar wind, the formation of the Aurora of Harrow Star has its own special mechanism.

Among the moons of Herro, the volcanic activity on Herowei II is very strong, often ejecting into space

When these charged particles break into the strong magnetic field of the Herro star, they are accelerated to very high speeds in the polar regions of the Herro star, and these high-speed energetic particles collide with the atmosphere of the Herro star to form a spectacular aurora scene in the atmosphere of the Herro star.

And the Phoenix Star should be called Hero Weisan in the strict sense, and it belongs to a natural satellite of the Herro Star. It is also the largest of them.

But Chen Xin still didn't see it.

At this time, the Princess was slowly mooring into the Herro Airport.

The Lyra civilization has built a superport around Herro in the synchronous orbit of Herro.

The essence of this airport is a super-large ring. The cross-section of the ring resembles a rectangle, with a cross-sectional area of more than 2,000 square kilometers, a radius of more than 5 million kilometers, and a circumference of more than 31 million kilometers.

Inside this ring alone, more than 500 million people work and live in it, and it is also the largest airport of the Lyra civilization. It can berth half a million satellite-class warships.

Of course, the role of this ring is not limited to the airport, it is also the largest particle collider of the Lyra civilization.

It can accelerate protons to almost infinitely close to the speed of light, and the energy generated by an instantaneous impact can collapse space-time within a radius of one meter, making it a meaningless realm.

This is also the most powerful practical device made by a fifth-level civilization. Further up, there is the ring star accelerator that only sixth-level civilizations have.

After the "Princess" spacecraft officially approached, Chen Xin, accompanied by Leah, boarded a rail train that entered the interior of the airport, and then transferred to the connection port of a meteorite-star spaceship.

After entering the ship, the ship silently separated from the port of Herro, and then slowly flew towards the ultimate destination of the trip, the Phoenix Star.

This time, Chen Xin visited the Tianqin civilization, and neither Chen Xin nor Leah wanted to reveal any rumors, so his arrival was also extremely low-key.

After flying for more than an hour, the true face of the Phoenix Star was finally presented in front of Chen Xin.

The Phoenix Star is a little smaller than the Earth, with a diameter of only about 8,000 kilometers, and in front of the Herro Star with a diameter of 600,000 kilometers, the Phoenix Star is completely small.

But it is precisely because of the existence of Hero Star that Phoenix Star gave birth to such a powerful fifth-level civilization.

In fact, for many Lyra, they can do without the α Lyra, but they definitely can't do without Hero.

Because according to the distance from Phoenix to the α of Lyra, the thermal radiation received by Phoenix is simply not enough for it to maintain a sufficient surface temperature, and it is impossible to store zài liquid water.

Liquid water is precisely one of the three natural conditions for the survival of carbon-based civilizations.

But with Herro Star is different, although Herro Star is not a real star, but its surface temperature has reached 1,800 K, and the thermal radiation received by Phoenix Star, which is four million kilometers away from it, is just enough to maintain a suitable temperature of about 300K on the surface of Phoenix Star.

Coupled with the dense atmosphere on Phoenix, the atmosphere of Phoenix is similar to that of Earth, and is also composed of nitrogen, oxygen, carbon dioxide, and inert gases.

Its surface atmospheric pressure is 1.2 times that of the Earth's, and its gravitational acceleration is only 0.7 times that of the Earth, which is why the Lyra people look so much slimmer. (To be continued......)