Su Meng had previously studied the knowledge provided by the Bright Alliance on Earth, and knew that the propagation of electromagnetic waves in the universe would be constantly attenuated, which was similar to spherical diffusion, and once the distance was too far, it would blend into the cosmic microwave background radiation and could not be distinguished.

In the 20th century, human beings have repeatedly sent radio waves into space to look for extraterrestrial civilizations, but never received a response, and later human beings realized that the energy of radio waves emitted from the earth is too low, once they leave the earth more than 10 light-years away, these radio waves will attenuate and cannot be distinguished, so they stopped this meaningless behavior.

Although this behavior is not of great significance, it at least tells Su Meng one information, that is, there is no alien civilization in the Alpha Centauri galaxy.

There is a planet in the Alpha Centauri system, and Su Meng's goal is precisely that planet, and she plans to go to that planet, build a bigger spaceship, and then leave the Alpha Centauri system and head towards another nearby star.

Radio telescopes probe the deep space of the universe and have not received any signals so far, which means that there is no civilization beyond Earth's technology within ten light-years, and Earth's technology is considered a minimum standard, and if the technology is not comparable to the Earth, it means that the knowledge and technology it has are useless.

When Su Meng was building the spaceship, he entered the information of about 600 stars stored in his computer, and among the more than 600 stars with detailed information, Su Meng could only reach 15.

However, even if it is these fifteen stars, Su Meng will not visit them one by one, because these fifteen stars are basically in completely different directions, and Su Meng can only use optical telescopes to re-observe, while planning his future course, as far as possible towards the place where there is a chance of alien civilization.

As a relatively large galaxy in the universe, the probability of an alien civilization in the galaxy itself is still very high, so Su Meng is very likely to find an alien civilization.

Of course, if you want to find an alien civilization, you must have enough luck and enough patience to do it, such as curvature navigation and other science fiction navigation methods, Su Meng has also analyzed, but the result of the analysis is a logical conflict, and there is no practical application effect.

Su Meng realized that without a breakthrough in basic understanding, it was likely that she would be trapped below 50% of the speed of light for a long time.

Einstein's theory of relativity does not help humans to gain the ability to travel faster than the speed of light, and this theory is only a theory about time and not space, which should perhaps be called Einstein-time relativity.

The limitations of time make it impossible to influence space, which is completely separated.

Time acts on matter, space is the basis for the creation of matter, and time and space do not affect each other.

Su Meng had already analyzed Einstein's theory tens of thousands of times, but he only got some logical traps, which were of little use.

Due to Su Meng's lack of corresponding knowledge, there is no way to speculate the principle of faster than light.

Even Su Meng used an optical telescope to see the faster-than-light phenomenon, regardless of whether this phenomenon existed or not, once the speed of light was exceeded, the light emitted by it would theoretically be invisible, or in other words, faster-than-light matter must be an object that does not emit light.

This is a logical inference, but it was proved by Su Meng using strong computing power.

Su Meng thought of the inference of human beings about dark matter in the earth era, maybe those dark matter are faster-than-light matter, but who can know?

The undetectability of the faster-than-light phenomenon made it impossible for Su Meng to contact the faster-than-light phenomenon through experiments that he didn't know existed, and the speed of light was like a bottomless cliff across Su Meng's face.

Su Meng looked at her sister in front of her, but for a moment she was thinking about the technological barriers she was facing.

"Sister, let's go to bed at night, I can't sleep now." Su Meng said.

"Hmm," Su Tian nodded.

Su Meng accompanied Su Tian, and the two began to watch the previous movies stored on Su Meng's computer.

Old movies are always easy to make people enter happy memories, and when he left the steel fortress, Su Meng put everything he could take into his personal space, including the supercomputer host where Su Meng downloaded a lot of things, and now these things have become the only vestiges of human beings.

Su Meng spent a happy day with Su Tian, watched several previous movies, and the movies moved Su Tian, but unfortunately the human race has become extinct, and there will never be new movies in the future.

Finally, it was night, but it was still dark. Su Tian stretched out a little tiredly, looked at Su Meng and said, "Sister."

Su Meng knew that Su Tian was saying that she was ready, nodded slightly, and then Su Tian closed her eyes.

Su Meng looked at Su Tian, and after about a few minutes, Su Tian fell asleep.

Su Meng's mind moved slightly, and Su Tian's body was put into a state of time deceleration.

"It's going to be another 4 years." Su Meng thought a little helplessly.

Su Meng picked up Su Tian from the bed, and Su Tian, who had entered a state of time deceleration, had no way to feel Su Meng's contact.

Holding her sister in one hand, Su Meng's body levitated, turned around and flew outside.

Su Meng came to the experimental area on the spaceship, where there were many instruments made by Su Meng, and Su Meng stopped in front of an instrument, which was an ultra-high-speed camera that could take more than 10,000 frames of photos per second.

Su Meng started her daily experiments, and Su Tian was held in her arms, and in the state of time slowdown, she had to sleep for at least 10 years at a time.

Of course, in fact, Su Tian's body has only passed for 10 hours.

"Time acceleration is useless, maybe we should experiment with ......changing the rules of space," Su Meng started a new experiment.

Time passed, and Su Meng was immersed in various experiments, often one experiment, which had to be carried out tens of thousands of times to ensure that there were no errors in the results of his experiments.

Although many experiments have come to a standstill due to basic theoretical problems, Su Meng has not given up, but has been persevering.

In the blink of an eye, four years have passed, and Su Meng's spaceship began to slow down more than half a year ago, and now Su Meng's spaceship has entered a huge elliptical orbit around the South Gate Two Galaxy.

The optical telescope on Su Meng's spacecraft saw the planet hidden in the brilliance of the stars for the first time.

It was a white planet, because it was locked by the tides, the planet did not revolve and rotate, it only moved with the movement of the stars, and at this moment, in Su Meng's view, the planet was like an iron block that had been heated to the melting point, emitting a very bright light.

Of course, the brightness of that planet was not as bright as the three planets next to it, but Su Meng used instruments to analyze the spectrum of that planet and found that the temperature on its surface was about 1,000 degrees.

Su Meng couldn't help but be speechless, this planet was completely unexpected, with a high temperature of 1000 degrees, Su Meng felt that the planet was completely unsuitable for human beings to approach.

However, this did not prevent Su Meng from getting close there, her body had changed from the particle level and could be transformed into various forms. But in the end, Su Meng still chose to give up, because she had no way to take her sister to the planet with her, and if her sister was left alone on the spaceship, Su Meng was very uneasy, so she decided to leave here after thinking about it for two days.

Su Meng re-set the course and set the target as a single star about 10.7 light-years away from the Alpha Centauri Galaxy, and Su Meng estimated that there would definitely be a suitable planet there to allow him and his sister to live peacefully for a while.

Su Meng's spacecraft began to accelerate again, and with the help of the gravitational pull of the Alpha Centauri Galaxy, after flying in an elliptical orbit for five days, the speed reached an escape velocity and began to leave the Alpha Centauri Galaxy.

Su Meng looked at the Alpha Centauri galaxy that was slowly left behind by his spaceship, and there was a faint sense of loneliness in his heart.

Looking at the younger sister in her arms, she had fallen into a deep sleep at this moment.