Chapter 891

"This is the" Xuan rabbit ". The preparations are completed before landing on the moon. We will officially start landing on the moon when the next round of flight reaches the disengaging position!

Gaia command center, please confirm whether the landing procedure is normal! " As the commander of this lunar mission, Tong Huamin began to confirm with the earth after the successful completion of the system self inspection.

At this time, the command center of Gaia base is in a tense and busy scene. At this last moment, it would be strange if they were not nervous at the moment!

Even the various probes that have been launched to the moon many times before have also verified the reliability of the overloaded man landing spacecraft for many times. However, the mentality when there is no astronaut is completely different from that when there are astronauts landing with the spacecraft now, not to mention that the boss is still there!

"No. 2, is the lunar landing procedure normal?" The voice of Zhao Feiyang, the commander-in-chief of the lunar landing project, rang in the control center.

"Report 1! There is no problem with manual detection, and the re inspection of the origin has passed smoothly, and the moon landing operation can be carried out! " Station 2, which is responsible for program testing, reported loudly.

After hearing this answer, Zhao Feiyang nodded his head in satisfaction and connected with the "xuantu" lunar space station. He said in a certain tone: "this is Gaia command center! The ground manual re inspection is normal, the origin re inspection is normal, and the lunar landing procedure can execute the lunar landing operation! "

After hearing this reply, Tong Huamin issued a command to execute the order of landing on the moon in a firm tone. Lei Tiantang and the other three astronauts who have entered the command module of the lunar spaceship have also confirmed all the normal responses. After that, the most critical node of the whole mission has arrived!

On the contrary, the atmosphere on their side is the most relaxed, because the whole lunar landing program is completely controlled by the set intelligent program when there is no abnormal situation, so they can do very little before landing on the moon surface.

It is not a simple thing to operate the 102 ton Houyi spacecraft combination to land on the predetermined landing platform precisely. This complex and delicate operation is better controlled by intelligent programs with response speed of microseconds.

Under normal circumstances, it is almost impossible for such a heavy giant to land on the moon safely, because if the moon surface is not treated and reinforced, even if the operation procedure is well controlled, such a heavy spacecraft will sink into the moon surface after landing, because the moon surface is as soft as the earth's soil.

Although the structure and physical and mechanical properties of the lunar soil layer on the surface of the moon are hard, there is no need to worry about the astronauts sinking into the lunar soil, but this does not mean that it can bear such a heavy guy with six supporting legs.

However, once the spacecraft assembly is trapped after landing, there will be more uncertainties. Therefore, for the sake of the safety of astronauts, in the early construction process, in addition to building a large number of solar panel arrays on the lunar surface outside the base, a platform for large tonnage spacecraft landing was specially built in the main landing area of the spacecraft.

However, because the building materials are very precious, this landing platform only uses mechanical equipment to hammer and roll this area. More professional platforms can only be built when the resources are sufficient in the future.

Now, in the eyes of hundreds of millions of earth's attention, the "Houyi" spacecraft combination successfully broke away from the "xuantu" space station at the predetermined orbit position, and officially began the moon landing journey!

First of all, the direction adjustment auxiliary engine started to work. Under the control of the program, they precisely adjusted the orbit and direction of the spacecraft assembly, and began to fly along the planned landing curve.

At a height of 6800 meters from the lunar surface, the main reduction engine successfully ignited. Under its huge reverse thrust, the descent speed of the combination began to decrease rapidly. The direction adjustment auxiliary engine also kept fine-tuning the position of the combination, aiming the huge object precisely at the landing platform.

Fortunately, the lunar landing process has been verified by seven successful landings, and three of them have successfully simulated manned landing. If we add in the number of landing times of various lunar surface detectors and various materials for the construction of the forward base, the number will increase to 22!

After so many successful landings, the infinite gravitation group has accumulated rich experience in lunar landing. Therefore, at this time, the most people in the earth control center and the space station "Xuan rabbit" are a little nervous, but more emotions are expectation!

When the distance from the moon surface is 300 meters, the speed of the whole combination has been reduced to 10 meters per second, and this speed is still rapidly decreasing. When the combination is 100 meters away from the moon, the speed is reduced to 6 meters per second. Now, the descent speed can be safely landed.

At this point, everyone's mood is relaxed, because even if there is a problem with the distance and descent speed, it will not affect the safety of the astronauts in the spacecraft.

Lei Tiantang's attention at this time has changed from observing all kinds of landing data to watching the final landing process of the spacecraft combination through the external ultra clear camera of the spacecraft with the people watching the live broadcast on earth, because at this time, they really don't need them to do anything.Of course, at this time, the main deceleration engine did not stop working, but continued to provide reverse thrust for the whole assembly. Until the spacecraft assembly was only 5 meters away from the moon, it began to reduce the thrust. At this time, the descent speed of the spacecraft assembly had been reduced to 0.5 meters per second.

After Lei Tiantang and the three astronauts felt a slight vibration, the landing process of the whole spacecraft assembly was successfully completed. All the people who watched the whole landing process were excited to celebrate, because the mission here can be regarded as a complete success!

Of course, it is still a little bit short now, because it has been said that the lunar landing spacecraft is a combination. Of the 102 tons, the weight of the command module and the re-entry module is only 25 tons. The remaining weight is the materials and scientific research equipment used for the construction of the forward base.

Now the whole combination has landed safely on the moon, but because the landing mode of the whole combination is the safest vertical landing mode, the command module where Lei Tiantang and three astronauts are located is still 8 meters high from the moon surface.

From here to the surface of the moon, they have to go down the ladder. Even if the moon's gravity is only one sixth of the earth's, the height of the two floors is still a little dangerous if you are not careful.

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