Age of Cataclysm: I can light up the technology tree

Under Lv Yongchang's command, the Earth slowly left Pler-452b and headed out of the star system driven by the curvature engine.

Under Zero's control, a large number of experimental ships, material ships and frigates followed the Earth.

After the expedition fleet, human civilization once again sent a scientific research fleet to the territory of the Enroget Alliance.

Neutron star.

One of the densest stars in the universe except for black holes.

When a bright star reaches the end of its life and explodes as a supernova, it may form a neutron star.

Its material density is extremely high - if an external force compresses the earth into a small ball with a diameter of about 20 meters, it becomes a neutron star.

Therefore, its surface gravity has also reached an extremely exaggerated level - hundreds of billions of times the gravity on the surface of the earth.

This powerful force can even crush atoms and press extranuclear electrons into the nucleus.

This is also the origin of the name of the neutron star, which is a star composed directly of dense neutrons.

Neutron degeneracy pressure and gravity are in balance, maintaining the existence of neutron stars and preventing them from collapsing into black holes; white dwarfs are the result of the balance between electron degeneracy pressure and gravity.

This is also the navigation target of this scientific research fleet, with a straight-line distance of 627 light years.

Although human civilization has long conducted scientific research near small black holes, human civilization is still only at the stage of distant observation when it comes to the exploration of neutron stars.

The reason is...

There are no neutron stars within the 500-light-year territory of human civilization.

As for before... human civilization at that time did not have the leisure to find a neutron star for research.

There is no doubt that the researchers in the Earth were excited at this time.

Especially when they learned that there was an artificial celestial body with a volume close to that of a gas giant planet near the neutron star, everyone was filled with curiosity.

Except for Lv Yongchang.

...

Lv Yongchang stood by the porthole, staring at the unique fantasy scene under the superluminal curvature navigation state outside the porthole, and his originally relaxed brows slightly wrinkled.

Indeed.

Both the space weapons and the relics of advanced civilizations brought him great surprises.

Especially this relic of advanced civilization has been explored for thousands of years by predecessors, and it can be basically confirmed that there is no advanced intelligent life inside it.

As for the reason... a bunch of bugs are scratching your door every day, and this scratching has lasted for thousands of years. What would you do?

In this case, the relics did not react at all, which is very telling.

But even so, after a brief surprise, Lu Yongchang fell into deep thought.

"What's wrong?"

Just as Lu Yongchang was lost in thought, Fang Xu's voice suddenly sounded from the side.

Then, a figure appeared beside him, also looking at the bizarre scene outside the porthole.

"There's nothing going on outside... Yongchang, how long have you been watching this scene? Are you still not tired of it?"

Lv Yongchang laughed dumbly, shook his head and explained: "No, I think there's something wrong with the structure of the ruins."

"Huh?"

Fang Xu's expression suddenly became serious about the ruins: "What do you mean? A trap?"

Lv Yongchang pondered for a moment and sorted out his thoughts.

"In the simplest terms, it shouldn't be this big."

"...What?"

Fang Xu's expression froze slightly, and there was a bit of weirdness and surprise in his eyes.

Just at that moment, he was even ready to face the advanced civilization, but Lv Yongchang gave him such a show?

Lv Yongchang obviously didn't notice Fang Xu's weird look, and continued to talk to himself.

"When studying the structure of the planetary fortress, we once built a model."

"Although the planetary fortress has many advantages, considering mobility and other issues, its volume has an upper limit.

"10 times the volume of the earth. ”

“This is the maximum volume of the planetary fortress calculated based on the model without considering the consumption of construction resources.”

“For planetary fortresses exceeding this volume, both in terms of mobility and unit volume structural strength will decline to a large extent.”

“If resource consumption is taken into account, a planetary fortress with a diameter of 5,000-8,000 kilometers will be the best choice.”

Lv Yongchang stretched out his hand and swept it across the air, and a holographic projection appeared in front of the two.

“Take a look at the remains of this advanced civilization.”

“The scale even exceeds that of Jupiter!”

“This far exceeds the optimal volume or even the maximum volume in our model.”

“However, in such a large volume, its mass is not large, only less than 5 times the mass of Jupiter.”

Lv Yongchang looked at Fang Xu with burning eyes: “There must be something wrong here.”

Fang Xu was puzzled.

Fang Xu pondered.

Fang Xu suddenly realized.

“Snap!”

He clapped his hands hard and said loudly: “You mean, this relic may have used some unknown material? "

"Is it possible that it is a dense structure similar to a neutron star?"

As soon as he finished speaking, he frowned and shook his head to overturn his own argument: "No, no, no, such a large dense structure of a neutron star... then the mass is incredible..."

"Is there another mystery?"

Lv Yongchang: "..."

Seeing Fang Xu walking further and further away on the wrong road, he hurriedly coughed and interrupted Fang Xu's thoughts.

"No."

"I mean...it's probably empty in here."

He looked at Fang Xu in surprise: "Why do you think so complicated?"

Fang Xu: "..."

"Empty?! This, this..."

Fang Xu looked at Lu Yongchang dumbfounded.

"When I say empty, I don't mean a vacuum."

Seeing that Fang Xu stopped talking, Lu Yongchang continued to explain: "But..."

"It may just be a shell wrapped around a gas giant planet."

Fang Xu couldn't help but fell into deep thought.

Although Lu Yongchang's conclusion is a bit too simple and crude.

But looking back and thinking about it carefully, it seems that this possibility is really not small.

It is a technological creation that is larger than Jupiter, but its mass is less than 5 times the mass of Jupiter. This average density is too low.

The average density of Jupiter is only 1.32!

Calculated, the average density of this technological creation is even smaller than that of Earth.

This is obviously impossible.

"Then what is their purpose of building this planetary fortress?" Fang Xu asked subconsciously, "Is it possible that the advanced civilization is still planning to leave with this gas giant planet?"

Lu Yongchang's eyes couldn't help but light up.

"Don't say it, don't say it!"

"It's really possible!"

Fang Xu looked at him helplessly.

"It's crazy..."

Fang Xu muttered in a low voice:

"There are gas giant planets everywhere. Does a civilization with such high technology need to pay attention to a gas giant planet..."

"What if, I mean what if..." A mysterious smile appeared on Lu Yongchang's lips, "What if this gas giant planet is the mother star of that civilization?"

Fang Xu's expression was suffocated and he fell into silence.