At this moment, the brightness of the sun seen by Li Qingsong is still about 4 times the brightest brightness of Venus seen from the earth.
It is still so bright and so dazzling.
After watching the sun rise, Li Qingsong turned around and looked at the journey ahead again.
According to the gravitational boundary of the solar system, the Oort Cloud is about 1 light year away from the sun. Although Li Qingsong has been sailing for so long, he has only traveled one-fifth of the territory of the solar system.
The immensity and vastness of the universe makes people feel despair.
But looking at the many spaceships under his command and feeling the hundreds of millions of clones who maintained a connection with his consciousness, Li Qingsong did not feel any despair in his heart, only determination.
He knew that as long as he kept going, he would reach his goal.
After sailing for a while, Li Qingsong finally made a slightly different discovery.
The numerous unmanned exploration spacecraft and satellites scattered around the fleet finally found the first macroscopic celestial body.
It is a rather large celestial body, with a maximum length of 78 km and a maximum width of 22 km.
It is gray and black in color as a whole, and it just floats quietly in the space.
There is no doubt that this is a star that has never been discovered before. At the same time, it is very likely the target that he wants to find.
A true Oort Cloud object.
Li Qingsong suppressed his excitement and decisively dispatched a large scientific research vessel to leave the fleet. He then tried his best to slow down. When the speed relative to the star was zero, he started reverse acceleration and chased after it.
It took several years, and the main fleet finally landed on it after sailing about trillion kilometers.
Because the distance is too far and the communication delay is too long, Li Qingsong basically has no way to exert much control here.
But it doesn’t matter, intelligent AI can complete that series of scientific research processes on behalf of Li Qingsong.
So, after leaving behind a lot of detection equipment here, the research vessel, carrying about 200 tons of specially mined specimens, accelerated again and chased after the main fleet.
By the time the research vessel returned to the main fleet, the main fleet had already traveled trillions of kilometers again and had truly reached the gravitational boundary of the solar system.
During this journey of trillions of kilometers, although Li Qingsong maintained a large-scale search and scan, he was unable to discover any macroscopic celestial bodies.
It was not until this moment, when they were really close to the gravitational boundary of the solar system, that Li Qingsong finally found another one.
Compared to the previous one, this star is much smaller in size, with its longest point being only 200 meters.
Without hesitation, Li Qingsong sent out another research vessel.
However, it will take several more years for the research vessel to complete a series of processes including deceleration - acceleration - deceleration for landing - acceleration to catch up with the main fleet - deceleration to merge with the main fleet.
Through observation through a remote telescope, Li Qingsong saw that this smaller star looked similar to the large star discovered previously and had a similar structure.
This means that the samples from the larger asteroid are also important references for this asteroid.
The clones in the main fleet carefully collected the hard-earned 200 tons of specimens and placed them in various laboratories. Combined with the data obtained from the original field survey, they immediately began observation and research.
Li Qingsong noticed that the material that made up this star was relatively fluffy. It was not made of thick rocks like ordinary rocky planets, but rather a bit like a sponge, with sparse and porous interior.
Its density is only grams per cubic centimeter, only half that of water.
It is mainly composed of some substances such as water ice, dust, carbon dioxide, and carbon monoxide, but the connection between them is not close.
Looking at these specimens and the asteroid in the distance that is only 200 meters in size, floating alone in the vast space, with no macroscopic objects within billions of kilometers, Li Qingsong's heart is filled with emotion.
It is very likely that this asteroid migrated here since the early days of the formation of the solar system, and has remained here quietly for billions of years.
The distance from here to the sun is about 1 light year, or about trillion kilometers.
This is the true boundary of the solar system, no matter how you look at it. Because beyond this point, it is unlikely that there will be any stars that are still under the control of the sun's gravity and revolve around it.
Yes, even at such a great distance, this asteroid still orbits the sun.
As seen from here, the Sun's brightness has dropped to about magnitude .
Although this is much dimmer than before, it is still comparable to the brightest Jupiter seen from Earth.
Looking at the entire sky, the sun is still the brightest star.
However... there is no essential difference between it and the other stars.
Although it is bright, it is not too bright. It just blends in with the myriad stars and is no longer special.
But even so, its gravity still controls all the celestial bodies here. Everything here must revolve around it.
Just like this asteroid now.
Its orbital speed relative to the sun is only about 300 meters per second. At this speed, it takes about 350 million years to orbit the sun.
Since its birth, it has only revolved around the star a dozen times.
The vastness and magnificence of the solar system and the breadth and infinity of the starry sky came upon him in such a way that it enveloped Li Qingsong's entire mind.
Looking at this asteroid, Li Qingsong sighed silently in his heart: "This is the solar system, this is the universe..."
During these years, countless stars exploded, turned into brilliant fireworks and disappeared from the universe, and countless stars were born from interstellar dust, ignited core fusion, blew away the dust disks around them with strong radiation, and spread light into the universe.
All the changes in the outside world seem to have no effect on this asteroid. It just stays there quietly, quietly preserving those specimens from the early formation of the solar system, unaffected by the outside world and not affecting the outside world, like a "refrigerator" with superior performance, spanning billions of years, bringing the specimens from the early formation of the solar system to the present.
Now, these specimens born in the early days of the solar system have come into Li Qingsong's hands and are beginning to undergo the most rigorous inspections with the most advanced equipment.
The mysteries of the early formation process of the solar system were thus vividly revealed to Li Qingsong, including the collapse process of the early solar system nebula, gravitational disturbances, changes in the galaxy when the sun was first "ignited", the influence of Jupiter's gravity, the formation mechanism of the earth, and so on. The answers to many questions emerged in front of Li Qingsong.
