From a scientific point of view, how difficult is it to land a man on the moon?

The difficulty of a manned landing on the moon is nothing more than overcoming the change in gravity, overcoming the change in gravity, because there is a change in gravity between the moon and the earth, and then there is a temperature difference, and there are some unknown dangers, and the unknown dangers should be the most terrible, because people do not have any plan of warning.

How difficult is it to carry people? Not only from a scientific point of view, we have to take people up from the earth to the moon by manned landing, which is very difficult, let alone a place that we are not familiar with.

The difficulty of manned landing on the moon actually lies in the process of this kind of research, for example, it takes a lot of difficulty to carry this tool, as well as some research and design of special instruments, as well as the selection of personnel.

From a scientific point of view, only the United States has landed on the moon for manned landing, but some people say that this is an illusion, after all, it is necessary to find satellite images to know whether they are true or false.

To overcome the fact that there is no environment suitable for people on the moon, it is necessary to artificially create an earthly environment, and how to pass through the atmosphere that can make objects burn when the spacecraft comes back, and it should be the most difficult for astronauts to return safely.

So far, only the United States has carried out manned moon landings, in the 1960s and 1970s.

In the 1960s, the United States implemented the Apollo moon landing program, which planned to send astronauts to the moon by the end of the 60s. The Apollo program began in May 1961 and lasted about 11 years until the sixth moon landing in December 1972.

On July 16, 1969, the Apollo 11 spacecraft was ignited by three astronauts: Commander Neil Armstrong, Command Module Pilot Michael Collins, and Lunar Module Pilot Buzz Aldrin.

Apollo 11 passed by the far side of the moon on July 19, 1969, and quickly ignited the main rocket to slow the spacecraft into lunar orbit. At 4 p.m. on July 20, 1969, the lunar module of Apollo 11 made a successful soft landing in the southern part of the Moon's Tranquility Sea.

At 2 o'clock on July 21, 1969, six and a half hours after the lunar module landed, Armstrong stepped onto the moon with the ladder of the lunar module, saying, "This is a small step for me, but a giant leap for all mankind." "He became the first human to land on the moon.

Aldrin also set foot on the moon soon after, and the two spent two and a half hours on the lunar surface, using drilling to obtain lunar core specimens, photographing some **, and collecting some lunar rock specimens.

Apollo 11 spent 21 hours on the moon (including a break of about 7 hours), and the two astronauts left the lunar surface in the ascent stage of the lunar module, returned to orbit around the moon, joined up with Corinth in orbit, started the engines to leave the moon and return to Earth. They were accompanied by kilograms of lunar samples. They landed safely in the Pacific Ocean on 24 July.

After that, the Apollo 12-17 spacecraft of the Apollo program were launched to the moon from November 1969 to December 1972. Except for Apollo 13, which failed to land on the moon due to failure, a total of 12 astronauts successfully landed on the moon.

Since the end of the Apollo program, no astronaut has ever landed on the moon.

It was first launched on July 16, 1969, and landed on July 21, 1969.

You may often hear that China has realized the large-scale and medium-sized flight around the moon such as Chang'e, why is it so difficult to land people on the moon. Return.

Because no one answered that manned vehicles are very light, it is easy for China's existing rocket technology to bring them up.

Once manned, the mass of the aircraft will increase exponentially, such as human safety protective gear, human food and water, human garbage, oxygen supply system, water supply system, pressurization and decompression system, air conditioning system, human sleeping gear, human experimental tools, ......

A flying machine may only be a few hundred kilograms to a ton, but once there is a person, it will be tens of tons.

To send dozens of tons to the moon at a distance of more than 400,000 kilometers (not in a straight line), you can imagine how much fuel propellant is needed.

At that time, the United States used the Saturn V to send Apollo to the country, accounting for 5% of GDP

What China needs to solve now is a high-thrust engine, and if it is solved by rolling and carrying cultivation, it will be able to land on the moon within a year (which is not an exaggeration).

From rockets to airplanes, tanks, and automobiles, it is no exaggeration that engines have always been China's soft underbelly.

According to China's lunar exploration program, the first phase is the "Chang'e-1" in 2007.

The mission of Chang'e-1 is to obtain three-dimensional images of the lunar surface, assess the thickness of lunar soil, and explore the Earth-Moon space. The second phase is the second phase of the Chang'e project between 2011 and 2013, "Chang'e-2" will achieve a soft landing of the robot patrol survey, at present, China to carry out this task of the technical, material conditions and economic strength have been basically available; In 2017, in the third phase of the Chang'e-3 project, robotic lunar surface sampling and return work can be carried out. Before 2024, the Chang'e-4 project will allow Chinese astronauts to return to the moon. Ouyang Ziyuan, chief scientist of lunar exploration, said that with the current technology, we can send people to the moon, but we can only achieve a "one-way ticket", and to allow astronauts to return to the earth safely, we want a "return ticket". It is expected that between 2020 and 2025, China will be able to achieve a manned landing on the moon.

Academician Long Lehao, deputy chief designer of the lunar exploration project, revealed that the relevant departments are currently conducting relevant demonstrations, and it is possible to merge the third and fourth stages of the lunar exploration project, so that Chinese astronauts can set foot on the moon as early as 2017 and realize the dream of circumnavigating the moon in the hearts of Chinese for many years.

It is estimated to be around 2030. According to the plan, Chang'e-5 will be launched at the end of this year for sample return. Chang'e-6 is also a sample return, but at the south pole of the moon, the time is probably around 2023, because from 2020 to 2022, China will focus on building China's first space station, and there is no time for lunar exploration.

The next launch of Chang'e-7 around 2025 is to conduct a comprehensive exploration mission of the moon's topography, material composition, and space environment, and determine the specific location of the manned landing on the moon. Then there will be the launch of Chang'e-8 around 2027, simulating a manned landing on the moon. Finally, around 2030, Chang'e-9 and Chang'e-10 will be launched, and Qiaonian officially kicked off the prelude to the manned landing on the moon.

If all goes well with a manned landing on the moon, it is possible to start building a lunar base around 2035. In addition, a manned lunar landing requires a high-thrust rocket, and the Long March 9, the largest thrust rocket developed in China's plan, is almost a test flight around 2028, so it will probably be around 2030 before a manned lunar landing can be considered.