Someday in the future, the asteroid belt is numbered ZG88163 asteroid.

"Captain, aren't we really going back and have a look?" An Asian man in a red and black uniform walked up to Zhang Tianhe, who was meditating, and asked.

"The way back is no less risky than the road we're going to, so I'm not sure ......" Zhang Tianhe woke up from his contemplation and looked at the loyal first mate beside him.

"If the Earth weren't that bad now, maybe ......," the first mate hesitated.

"I'm afraid that even if the earth is much cleaner, it will no longer be suitable for us......"

"But the crew wants to go back, after all, we are going further afield, and the earth is always our home......

"Home...... If we lose the earth, what qualifications do human beings have to talk about home, now we are only worthy of talking about the nest ......" Zhang Tianhe suddenly seemed to have made up his mind, "Go back!" Got your thoughts! After all, every trip should have a decent starting point! Since everyone wants to go back and say goodbye to their former homeland, let's go back! Report it! ”

Zhang Tianhe's spacecraft is called "Fanxing", this is a spacecraft driven by nuclear fusion technology, human beings have a great future in this discipline, once for a while, people after realizing the controllable nuclear fusion technology from hydrogen to helium thought that they had mastered the ultimate secret of the universe, and people in that era were confident that they could achieve more energetic fusion technology, and accelerate the spacecraft to unprecedented speed. But people ignore the problem that even if you accelerate the spaceship to the speed of light, it is useless, because the structure of human beings itself restricts you from moving with so much momentum, so the key is not how much energy can be used, but how much energy can be resisted by what human intelligence creates for you - in this era, human intelligence is not in the spear, but in the shield. The human body can be under heavy protection, even if it is driven to the speed of light, it can be protected, but the scientists at that time found a strange problem: when a person is in the fusion drive reaches a certain speed, his consciousness will be confused, when the spacecraft is driven to one hundredth of the speed of light, no matter how tightly protected you are, the astronauts in it will inexplicably lose consciousness, confusion, and lack of consciousness, and some people will almost become an idiot when they come out of such a high speed.

So here an insurmountable problem arises: perhaps human technology can reach infinity, but human consciousness cannot.

At that time, a conspiracy theory began to appear, believing that not only the human body, but also the human consciousness was created by some kind of creator, and in order to avoid human self-destruction, it imposed some kind of imprisonment on human beings in their bodies and consciousness, just like putting a chew on a mule that was eating other people's crops around, and human beings could never break through this limit, so there was a pessimistic atmosphere in the scientific community at that time. Some people also believe that it is this pessimistic atmosphere that has led to the destruction of human homes, which is not objective, at least not here in Zhang Tianhe.

Zhang Tianhe is Chinese, he always believes in a kind of reincarnation theory, everything has a beginning and an end, the destruction of the earth is only for human beings, after the outbreak of the nuclear war human beings left the earth, but at that time the moon and Mars already had human pioneer stations, human beings can learn a lesson and continue to thrive in these places. But no, people have been fighting from Earth to Mars, and if it weren't for the people on Mars at that time, it is still unknown where they would have been destroyed. For Zhang Tianhe, the earth may not be suitable for human habitation, but there will always be other creatures or creatures to take its place, and it makes no difference to the earth, so he always believes that everything is the problem of human beings, and has little to do with everything else.

The strange thing is that when people find that the technology is unlimited and their consciousness is limited, they come back and hit their own people first, just like a child, and if an adult doesn't give him candy to eat, he will kick the dog, and now people who have left the earth feel that the original thing is very ridiculous, so everyone avoids talking about it. From a technical point of view, human beings have mastered the energy of nuclear fusion is equivalent to mastering endless energy, according to the previous optimistic scientists' prediction of unlimited energy human beings have seen the dawn of peace, the result is that the earth has seen the end of the world, which has to be said to be quite an ironic thing, now two hundred years have passed since the Mars War, human beings have not made any breakthroughs in science, because people have found that basic physics has come to an end. People can break up the nucleus, gather it, divide it into upper and lower quarks, fermion bosons, but this has no meaning for human development - so people began to study human consciousness, what is consciousness? How to protect the integrity of consciousness? How to ensure self-consciousness on the way to the future has become the most concerned study of scientists on Mars, but the progress of this discipline is slower than basic physics, and people have never been able to overcome the problem of how to avoid the collapse of consciousness.

Basic physics has stopped, experimental physics is no better, humans on Mars are the people who have the most sense of belonging right now, and they are the ones who have changed the status quo on Mars. The big dome was built on Mars, and people could achieve a certain degree of freedom in it, and metropolises like New York and Shanghai were built, and people cultivated, domesticated, cultivated, and produced in them, but people felt more and more that the planet was never built for human survival - once they got out of the dome, people couldn't live for even five minutes, and people couldn't wrap the whole of Mars in a dome after all. At this time, there are still nostalgic and radical people on Mars, as well as conservatives who are content with the status quo, everyone is arguing, as if everyone has been wronged, fighting is a common thing, and they will slap each other's mouths before they can finish three sentences, but fortunately, at least no one is clamoring for war anymore at this time - if Mars is also defeated, people really don't know where to go.

But in Zhang Tianhe's eyes, slapping the mouth is just a small-scale nuclear war, and because of nuclear fusion technology, this tendency to slap people in the mouth is extremely dangerous - it seems that it is only a matter of time before he takes out nuclear bombs to destroy each other, so he obtained a diploma in cosmic science, followed the Mars spacecraft to explore the solar system from his youth, step by step from crew to captain, and now undertakes the task of exploring interstellar space.

It is very strange to say that human beings began to send countless probes into interstellar space before there was a war, and later unmanned probes launched on Mars can accelerate to five percent of the speed of light, and many aircraft have flown out of the solar system, but as soon as they fly out of the Oort cloud, these probes will immediately lose contact, and there will be no news at all. The Martians (as they now call themselves) had been depressed for a while after that war, and it was widely believed that there was no point in sending anything into interstellar space, because in the end the humans could not go there on their own. But in addition to time and death, there is also curiosity, after two hundred years of continuous efforts by radical scientists, the Star Project was finally approved by the Martian government, and now the mission of Star is to explore interstellar space, to reach places that humans have never reached before, to find out the cause of the failure of those previous probes.

With the development of human science, there are many places in the solar system that can be reached, but there are very few places that can stay for a long time. Despite the occurrence of a nuclear war, and the reasons for the great war, the Earth is still one of the few places where humans can stay for a long time, and now the Martians are still sending probes to the Earth in waves, sending biologists and physicists to find a way to restore the living environment. According to these scientists, the nuclear war on Earth has completely polluted the surface and even the interior of the Earth, and it will take at least thousands of years for the Earth to return to the level where humans can live without protection in the past, and it is better to send a spaceship to it or try to change its current appearance, and it is even better to spend more time building Mars......

"Humans can turn the earth into the sun, but they can't turn the sun into the earth." There was a scientist who said something like that at the time.

"If we can't go back, then we can try to fly into the future!" Here are the words of another radical scientist.

So the Star was designed, a highly autonomous warship, yes, a battleship. Although the Martians won the final victory in the Martian War, there are still a considerable number of earthlings who retreated to some corners of the solar system that no one knows, and their hatred of the Martians can be said to be incompatible, and it is said that the greatest danger of the stars may not come from interstellar space, but from these fleeing earthlings - they still have the ability to start a nuclear war, although they have been hidden for two hundred years, but this part of the people is still the biggest threat to the Martians in the universe. Although the Star is completely autonomous in terms of energy and ecology, and can travel in space endlessly, it still cannot break the speed limit of one hundredth of the speed of light, otherwise the crew will face the risk of a willpower, so it will be a long journey.

In fact, most of the crew members were skeptical about surviving if they could break through interstellar space when they set off, but they all saw through this, and the Martians actually saw life and death much easier than the previous earthlings - as if they were gone, and they could go anywhere. There are many physicists and biologists in the crew, because humanity has only now discovered that these are the two things that matter most to them: energy and survival. There are several neurologists on board, and this category of people is looked down upon by the first two because they study ethereal things, and moreover, the consciousness of others. On the other hand, neurologists also look down on the first two kinds of people, because in their opinion, the breakthrough of human development is in consciousness, but now they can't grasp its laws, so Shangzhang Tianhe has to pay attention to the relationship between these people - if there are any scientific results in this journey, it is from these three types of people, but I am afraid that even he has a tragic feeling that he will never return: there is no reason to say that their manned spacecraft is more advanced than those unmanned probes, or luckier.