Is American technology regressing? It was possible to land on the moon more than 50 years ago, why can't even a moon landing rocket be launched now
Release time：2023-02-07 05:52:45 source：korpimaankyynel.com author：Forest
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Is American technology regressing? It was possible to land on the moon more than 50 years ago, why can't even a moon landing rocket be launched now
Although the United States leads the world in manned spaceflight, the Voyager 1 they launched has flown 23.3 billion kilometers away from the earth, making it the farthest spacecraft ever launched by human beings, but in many cases, the United States seems to be a little bit I can't help but think that American technology has regressed. A typical example is that in the years after the retirement of the space shuttle in 2011, American astronauts who went to the International Space Station or returned to Earth from the International Space Station could only choose to buy the Russian Soyuz spacecraft at a high price. It was not until the appearance of SpaceX's manned Dragon spacecraft that the situation changed. Now the United States can get rid of its dependence on the Russian Soyuz manned spacecraft and rely on its own manned spacecraft to go to the International Space Station. In addition, there is another issue that everyone is more concerned about now, that is NASA's Artemis manned return to the moon plan. It is strange that the United States was able to send astronauts to the moon more than 50 years ago, but why can't even lunar rockets be launched now?
Delayed launch of lunar rocket
More than 50 years ago, the manned moon landing could not be separated from heavy launch vehicles, and it is still true today , it is impossible to send a manned spacecraft to the lunar surface without a powerful rocket. In order to achieve the goal of manned return to the moon, NASA has developed the most powerful rocket in history, that is, the well-known Space Launch System rocket (or SLS). According to the plan, the 98-meter-high Space Launch System rocket is scheduled to launch on the evening of August 29, 2022, sending an Orion manned spacecraft carrying 3 mannequins equipped with instruments into space for a period of 42 day trip to the moon. In this mission, although no astronauts were carried, there are still many bright spots. For example, newly developed rockets and spacecraft were used, and the trip to the moon lasted for more than a month, which was much longer than that of the Apollo spacecraft. longer. In addition, there will be 10 cubesats, which are relatively small in size, about the size of a briefcase, and can be used to detect the moon, asteroids and deep space radiation environment. But things backfired. As the launch time of the rocket drew closer, various problems continued to arise. One of them is that these CubeSats have been stagnated in the rocket for more than a year, and the batteries of some satellites are about to run out, so the staff is worried that half of the satellites may not have enough energy to complete the mission, maybe even the solar panels. Unable to start and expand. After the 48-hour countdown before the launch, thunderstorms also occurred at the launch site, and the launch pad was struck by lightning three times. Not only that, the new generation of manned lunar landing rockets was originally planned to be launched on August 29, 2022 local time, starting the first step of the US plan to return to the moon, but the launch mission stopped about 40 minutes after the launch countdown. There was a fuel leak problem. At that time, it could be said that the "arrow was on the string", but the launch had to be postponed because of problems. NASA said that the next launch window is September 2, 2022 local time. If there is still bad weather or other conditions in the next window, It may continue to be postponed until September 5.Technology regressed?
According to CNN, the rocket has found several technical glitches since it started refueling, so engineers had to carry out emergency repairs. This is not the first time that a space launch system rocket has had a fuel leakage problem. As early as the beginning of this year, the rocket has had a leakage problem, and the part where the fuel leak occurs now is the same as the one that leaked at the beginning of this year. At the beginning of the year, NASA also carried out "large-scale repair work" on the leaked parts, but now the problem of fuel leakage still exists. This makes many people worry about the safety of the space launch system. After all, this rocket is used to launch a manned spacecraft to the moon. The rocket still has these technical failures. Can the manned return to the moon plan really be completed as scheduled? In contrast, the Saturn V, which was used to implement the Apollo manned lunar landing program that year, seems to be more reliable and safe. The Saturn V, which was developed in 1962, was completed in just over 5 years. The first launch was completed on November 9, 1969. By May 1973, the last mission sent the U.S. The first space station "Skylab" was sent into low-Earth orbit, and Saturn V was launched 17 times, with a success rate of 100%. The Saturn V rocket was so smooth back then, but now there are many difficulties in the launch of the newly developed Space Launch System rocket in the United States. Is it difficult for the United States to really experience technological regression?Is it possible to return to the moon in 2025?
Whether there is a technical regression problem, we will not talk about it. Now the launch of the rocket has been postponed again. Although this mission did not carry astronauts, it is very important for the plan to return to the moon, because the "Artemis 1" mission is the first of the US plan to return to the moon. If this unmanned mission goes well, then NASA will implement the "Artemis 2" manned mission around the moon, which will launch a manned Orion spacecraft to fly around the moon and return Earth, and finally implement the "Artemis 3" lunar mission to send astronauts to the lunar surface and achieve the goal of returning to the moon. According to the initial plan, NASA originally planned to realize the manned return to the moon plan before 2024, but due to insufficient funding, poor rocket development and other reasons, in 2021, NASA announced that the manned return to the moon will be delayed to 2025. year. This may still be the most ideal time node. Only if the "Artemis 1" unmanned flight mission and the "Artemis 2" manned mission around the moon go smoothly, will the "Artemis 1" mission be implemented. Mission 3" mission. If there are problems with the first two flight missions, it is obvious that the "Artemis 3" mission will not be implemented so quickly, but it will take time to solve these technical problems. NASA's inspector general has said that the research and development technology needed to carry a man to the moon cannot be ready before 2026 at the earliest. Even if the technical problems can be solved, many people worry that returning to the moon in 2025 will be difficult to achieve. According to the assumption, the development cost of the space launch system rocket is about 6 billion US dollars, and the cost of each rocket launch is 500 million US dollars, but now the development of the rocket has seriously exceeded the budget, and the cost has exceeded 20 billion US dollars. The cost of the launch would be as high as $4.1 billion. In the case of technical problems, cost overruns, etc., can the United States still complete the manned return to the moon plan according to the "timetable"? It's really hard to tell. If the United States fails to complete the manned return to the moon plan as scheduled, it may be the first to land on the moon by China. Because our country also has plans for manned landing on the moon and building a lunar scientific research station, we may achieve manned landing on the moon around 2030. Therefore, the United States now estimates that the pressure is relatively large.- Last：Stonehenge mysteriously appeared 7,000 years ago, and the Spaniards are worried that extreme drought may reappear in Europe
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