In the vast universe, in addition to stars, planets, comets and other celestial bodies, there is not an absolute vacuum, and a lot of interstellar dust will float in many places.


    There is no essential difference between their composition and that of planets. They are all particles of rock and metal. Under the constraints of appropriate gravity and spiritual magnetic field, they condense into nebulous objects, so they are also called "nebulae".


    The remains of Pangu civilization "Kunlun" is hidden in a crab like cloud, and now another "black spot nebula" is coming.


    Perhaps the Pangu civilization has mastered some secret way to manipulate the nebula, which is unknown.


    Li Yao knows that according to the composition of the metal particles in the nebula and the changes in the magnetic field that condenses them, the nebula can present various unimaginable features, such as sending and shielding special radiation, absorbing and releasing psionic power, and so on.


    "That''s all we know at the moment."


    Professor Mo Xuan said, "although we have found each other''s location, we are covered by a large" black spot nebula ". With our current technical level, we can''t directly observe each other in the three realms of Tianyuan, Feixing and blood demon to see their reality!"


    "However, from the perspective of the universe, the distance between the other side and us is not very far. Such a mysterious unknown world suddenly emerges from our side and takes the initiative to greet us. It is really not clear whether it is a blessing or a curse."


    "On the side of the couch, how can others snore, especially such a person who we know nothing about!"


    "The most important thing is, come here, you come and see, this is the simulated trajectory map that we combined the star map of Pangu Wen with the observation map of Tianjie in Cixing Zhai. Have you found the problem?"


    Professor Mo Xuan pointed to the top of the picture and said, "yes, this mysterious world is not far away from the forward route of the real imperial expeditionary army. A hundred years later, when the imperial expeditionary army passes by, it is possible to discover this world, just like Su Changfa and other immortals in Kunlun five years ago."


    Li Yaochang breathed a sigh of relief. As long as he thought about letting Su Changfa and other immortals monopolize Kunlun, he could imagine the seriousness of this matter.


    "Kunlun" is just a "arsenal" built by Pangu civilization by using the power emitted by pulsars. Since this mysterious world is regarded as an escape destination by countless Pangu people, it is obviously their important stronghold and regional military center.


    If such a world is inextricably linked with the imperial expeditionary army, it will not be a good thing for the well prepared Federation.


    After hundreds of thousands of vicissitudes, does this mysterious world still exist?


    What race and civilization are living in this world now?


    This area is far away from the prosperous area in the center of Xinghai, so it is unlikely that it is the Empire and shengmeng people. Who is it? Is it the demon clan or demon cultivator, or even the descendant of Pangu clan or Nuwa clan? Or even more strange?


    What''s more, why do they want to "say hello" to Tianyuan and Feixing? Is it goodwill or malice, or do they really want to communicate with each other, or do they want to hide evil intentions and set traps?


    "I see!"


    Li Yao narrowed his eyes and said, "since we have found each other, we must not sit back and ignore each other. We can only use the most stupid way to send an expedition team as soon as possible to jump into this mysterious world, spy on the local reality, find out each other''s position, civilization level, whether it is a threat to us, whether it will be used or even conquered by the imperial expeditionary army, and so on!"


    "Otherwise, if we have worked hard for a hundred years and thought that we were solid and sure to win, we would be ridiculous if we killed another powerful enemy in the mysterious world besides the imperial expeditionary army."


    "The teacher''s so-called" special task "refers to this matter, right? What''s the matter? I''ll go. It''s just the right major! "


    Professor Mo Xuan and Si koulie looked at each other. The professor coughed and said, "Li Yao, don''t worry. Listen to me."


    "This mysterious world hidden deep in the black spot nebula is very different from the rest of the star regions to be explored by project Tianlu."


    "First of all, it''s very far away. As you can see, it''s almost at the edge of this ancient star map. It''s very difficult to jump over it directly!"


    "Secondly, there are dozens of star systems near this mysterious world, all of which are shrouded in fog. We don''t know what''s going on inside at all!"


    "To search for a vast world hidden hundreds of thousands of years ago in such a dark cloud is just like looking for a needle in a haystack, which is tens or even hundreds of times more difficult than searching for other vast worlds!"


    "Therefore, the Starship carrying out this exploration mission must be able to withstand hundreds or even thousands of jumps in the star sea, and also have a very strong normal sailing speed. It''s better to have the ability to receive the signals released by Pangu civilization, as well as a well-equipped hibernation system."


    "Looking at the three realms, our starship refining level is not enough to directly refine such an exploration ship, including the multi-functional exploration ship" spark "in the era of the star sea Empire, which also has no such ability."


    "Only the Mars, which was transformed from the Pangu civilization''s single person escape capsule and is one order smaller than the spark, can have this ability!"


    "Just now, Daoyou Sikou also said that Mars was transformed from Pangu civilization''s single escape capsule, which directly uses a large number of Pangu civilization''s magic weapon units. This means that it is unique, and we are unlikely to produce a second one in decades!"


    Li Yao finally understood and took a cold breath: "the teacher said that with our current technical level, we can only launch Mars to carry an explorer to the dark nebula and look for the mysterious world that has disappeared a long time ago?"


    "Yes."


    Professor Mo Xuan nodded, "it''s just a hammer business. If this Explorer is trapped in the dark nebula, we don''t even have the ability to organize a rescue team. We can only give up this task completely and wait for someone to come to us one day!"


    "And this is not the most special part of this task."


    "Eh?"


    Li Yao is silly. "It''s exaggerating. It''s not the most special. What''s the problem?"


    "The problem is that the speed of Mars is too fast. It is not only the first in the three worlds, but also several times ahead of the second place, reaching the real sub light speed!"


    "It can accelerate to the" sub light speed "state immediately after the sea of stars jump, which is the biggest reason why we chose it to explore the dark nebula," he said


    "Isn''t that good?"


    Li Yao didn''t understand, "since Mars can repeatedly jump across the sea of stars, and has the ability of conventional navigation at sub light speed, and it has been modified by the Pangu escape capsule, so it has a great chance to receive the other party''s signal. It''s tailor-made for this exploration mission. What''s wrong with its high speed?"


    "Have you ever heard of the clock slow scale effect?"


    Sikuolie said with a bitter smile, "in short, when an object gradually approaches the speed of light, the time around it will slow down rapidly, and the space will shrink rapidly. The closer it approaches the speed of light, the thinner the meaning of time and space will be. Once it reaches the speed of light, time will stop, and space will collapse into a point and enter the state of" zero time and space! "


    "To reach or even surpass the speed of light is something we can''t imagine with our technical level, so the" zero time and space "state is just our guess."


    "However, when the speed of light is close to the speed of light, time will slow down relatively, which is a fact that can be observed and confirmed."


    "In most of our previous interstellar voyages, we relied on the sea of stars to jump around the barrier of" speed of light ". In normal voyages, our starships rarely stay at sub speed of light, and they can only rush up for a few seconds at most!"


    "Therefore, even if the phenomenon of" clock slow scale shrinking "really exists, the impact on us is negligible."


    "This mission is different."


    "First of all, Mars, the fastest starship in the three worlds, is on this mission. It often breaks through sublight speed and maintains it for a long time; Secondly, it is destined to fly at sub light speed for a long time before it can find the mysterious world hidden in the dark nebula


    "The combination of these two factors means that for the explorer who controls Mars, his perception of the passage of time is different from those who stay in the three realms of Tianyuan, Feixing and blood demon!"


    "Maybe in his opinion, it''s only a year and a half of exploration, but in the three circles, decades have passed in a hurry."


    "Do you understand, Li Yao?"


    Professor Mo Xuan sighed, "if we really want to explore this mysterious world, we can only send one explorer. Even for him, he has completed the exploration, mapping and positioning smoothly and cleanly. When he returns to Tianyuan, it is very likely that decades or even hundreds of years have passed!"


    "This is the most special and tangled exploration task in the Tianlu project."


    "In other worlds, the navigation channels are relatively clear, the location is relatively clear, and there is not much interference. If you can find the best, you can jump to the new star field immediately to find the next one. It''s really no harvest. You can go back to the Federation in three to five years, or at most ten years, to reunite with your family and promote other projects."


    "Only this task is too uncertain, and the time is too long!"


    Li Yao and Ding lingdang were silent at the same time.


    Clock scale effect?


    The closer to the speed of light, the slower the relative time goes?


    Will it take at least decades to carry out such an exploration mission?


    This was something they never thought of before they joined hands.


    "No matter how difficult the task is, how long it takes, how much it costs, we have to carry it out, right?"


    Li Yao said seriously, "because, we can''t watch a mysterious world emerge from our side, and greet us without any response?"