Driven by the blazing flames, this rocket, powered purely by chemical fuel, began to accelerate violently. In the Bluetuk settlement, Momorans looked at the bright sun in the sky with some awe. Although the technology is very backward, so backward that it is like a barbarian, and in this era they still use chemical fuel rockets, but... It's a fucking wonder that a rocket this big can be built. He inexplicably felt as if he was reading a history book and saw that his ancestors had built giant buildings hundreds of meters high in an era when they did not even have iron tools. “This civilization… is full of weirdness. With such backward technology, they were able to achieve deep space exploration by building such a large rocket; It was only a gunpowder gun, but it was able to defeat our armed fleet; There are so many people, yet they are able to cooperate so well and coordinate with each other. At the same time, everyone is doing their best without any complaints. Is the degree of civilization and unity so high? The strangest thing is that everyone looks so similar, but you can’t ask. If you ask, you will be tortured. It seems that saying that they look similar is an offense to them. It’s really strange…”
Momolance sighed softly and carefully retreated back to the residence assigned to him. Now, he didn't want to think about anything else. He just wanted to cooperate as much as possible, suffer less torture, and live until the arrival of the main fleet of civilization. Then I will be free... By then, I will definitely ask them again why they all look so similar, and see if they dare to torture me... … In space, Li Qingsong stared solemnly at the giant rocket that was gradually moving away. Amid the intense combustion of liquid hydrogen and liquid oxygen, its speed has now reached more than ten kilometers per second relative to Roselle. At the same time, more than 20,000 tons of fuel in the third-stage rocket have been consumed. Separation! As soon as the command was given, the third stage rocket, which occupied two-thirds of the length of the rocket body, immediately separated. The second stage rocket then ignited, pushing the rocket body, whose overall mass had been greatly reduced, to continue accelerating. Faster and faster. After that, the second-stage rocket separated and the third-stage rocket ignited. Finally, the probe separated from the third-stage rocket and entered the inertial navigation state. At this moment, its speed has reached an ultra-high speed that no spacecraft of Li Qingsong has ever reached, reaching more than 80 kilometers per second! Moreover, as it approaches the sun, its speed will continue to increase. Because the process of approaching the sun can be compared to the process of a heavy object falling from a high place to the ground. According to Li Qingsong's calculations, when the probe is closest to the sun, its speed will reach its highest, even exceeding 300 kilometers per second. Yes, it does not fly directly to the earth, but first flies to the sun and accelerates in the process. After bypassing the sun, it slows down with the help of the sun's gravity before reaching the earth. But... even with such a high speed, it will take about years for the probe to reach Earth from Rosene. It’s not that Li Qingsong doesn’t want to go faster, but that he can’t.
Even the current speed is achieved by consuming tens of thousands of tons of fuel. A super-giant rocket with a total mass of more than 70,000 tons serves only this probe with a mass of only five tons, and can only accelerate it to its current speed. Among this five-ton probe, up to 4,500 kg of payload is also fuel, which is used to slow down when approaching the earth. Otherwise it would not be able to stay in orbit around the Earth. In the end, the actual payload that reached the Earth was only tons. Pure chemical fuel propulsion is such a waste. But there was no other way. At this moment, Li Qingsong had not even mastered the secondary pressurization propulsion technology used by humans, let alone the high-speed ion propulsion used by the Bluetook civilization. At this moment, this small probe has already plunged into deep space, flying rapidly towards the direction of the sun. Apart from some data about coordinates and equipment operating status, Li Qingsong couldn't even use the telescope on the probe to take a look at the distant scenery. Because except for the most critical core equipment, all other equipment of this detector is in sleep mode and not turned on. They need energy to operate, they need electricity, they need to generate electricity by burning fuel. But now, the tons of fuel it carries is so precious that it cannot be moved lightly. "Once we are closer to the sun, we can deploy solar panels and get electricity from the sun, and then the situation will be better." Li Qingsong was thinking with a heavy heart. Time passed quietly, and several years went by in the blink of an eye. During this period of time, Li Qingsong has been doing reverse engineering work on the technological creations of the Blueprint civilization. Although there are not many technologies that can be used now, there are still some. Under Li Qingsong's various means, those captured Bluetuk people, even if they were unwilling or resentful, finally joined in the cause of promoting Li Qingsong's technological development and objectively contributed a lot. As a result, the Luoshen base cluster has been in a state of rapid development, and the iteration of technology and equipment has never stopped. At this time, the probe had flown over a distance of more than 10 billion kilometers, from the edge of the solar system, into the interior of the solar system, and approached the outermost large planet, Neptune. Here, the probe made its first orbital change, briefly started its propulsion, and turned on the camera for a while to record some images of Neptune. Looking at the huge blue gas planet, Li Qingsong suddenly recalled the time when he passed by it on the Deep Space Spacecraft. "Hello, Neptune." At this moment, the speed of the probe has increased to 102 kilometers per second and is still increasing slowly. After passing Neptune, the next planet we pass by is Jupiter. Here at Jupiter, the probe turned on again briefly and then headed straight for the Sun. Finally, the probe passed by the sun at a distance of only 5 million kilometers. After passing behind the sun, the probe began to slow down at full speed. tons of fuel began to burn, generating hot gases, which pushed the small probe to slow down rapidly. Eventually, when the speed dropped to only kilometers per second, it caught up with the Earth and entered the Earth's orbit. After a long 14-hour delay, the command from Luoshen finally arrived. The probe adjusted its posture and pointed its optical telescope towards the earth.
After an equally long delay of more than ten hours, the signal from the detector was received by the giant antenna array and finally presented in front of Li Qingsong. Li Qingsong saw the blue ocean, the lush forests, the green grasslands, and the desolate desert. What appeared before him was a completely and utterly pristine Earth that seemed uncontaminated and unmodified by any intelligent life.