Do immigrants count as immigrants if they don't land?

Why didn't the United States develop the moon first and focus on Mars?

It stands to reason that this is indeed the case. Not so close to the moon, but so far to Mars. Have Americans ever been kicked in the head by a donkey?

So let's look at the attraction of the moon and Mars.

First, let's look at the advantages of the moon:

1. The closest to the moon is the Earth, with an average distance of only 384,000 kilometers.

2. The gravity of the moon is only about 1/6 of that of the earth, so it is very suitable to use the moon as a forward base.

3. Moon dust contains a lot of helium III, which is an important nuclear fusion fuel in the future!

4. Various mineral resources on the moon .......

The moon has so many advantages, but it also has fatal disadvantages. There is no atmosphere on the surface of the moon, the temperature difference between day and night is large (more than 300 degrees), and there is no water resource. Even if most of them exist in the form of compounds, they need to be extracted ... but the moon is really a good classroom for us to practice in deep space, where all our skills will be thoroughly tested, and the cost is not high compared with real deep space!

What about Mars? Although the moon has mixed feelings, it is not impossible for the moon to go ... why go to Mars?

1. The atmosphere of Mars is thin, which makes the temperature difference between day and night of Mars not too big. In summer, the temperature in the equatorial region of Mars is about 20 degrees!

2. Mars has water ice and carbon dioxide dry ice, which can be used to synthesize methane fuel. Iron Man Musk's Mars landing plan is to make fuel on Mars and then come back. Although it seems a bit unreliable, it shows that it can still be operated!

3. The gravity of Mars is only stronger than that of the Earth 1/3, about 38%. As a forward base, Mars is also suitable, and more suitable than the moon, because Mars is relatively easy to get water!

4. Mars is also rich in resources. .....

However, Mars is too far away from the earth. It was only 55 million kilometers recently. However, Horman transferred his orbit from Earth to Mars. So hundreds of millions of kilometers, half a year, communication delay, weak signal, sun shading ... There are too many obstacles, but the temptation of Mars is so great that people can't stop!

So far, there are 73+ 1 detector launched to the moon (Chang 'e IV) and 40+ 1 detector launched to Mars, which is still more than Mars!

Of course, the above picture only includes those who have logged in, and only those who have not logged in are surrounded!

The above picture shows the probe to Mars. The successes and failures are listed!

But no matter which celestial body you go to, it costs a lot of money. Of course, even if no one explored the moon, after the last wave of lunar exploration, NASA's interest turned to Mars! However, the biggest possibility is that NASA intends to own both the moon and Mars, but in fact, the budget of 2 1 century forced NASA to choose only one of them, and Apollo's landing on the moon was cancelled because of funds and subsequent value-added plans!

So now NASA has put forward plans to return to the moon several times. It is difficult to carry out this huge plan in this time-pressed era, and there are a series of plans for Mars exploration, which have been halfway through, and follow-up plans have emerged one after another ... But after this wave, to be honest, if the future of Mars can't keep up with value-added industries (that is, how to develop profitable business from these plans), it can only rely on the will of the country. In case there is a president who doesn't support the space program,

So don't be too happy, long-term high investment in Mars exploration is unsustainable!

Why didn't the United States develop the moon first? I think when I see this problem, many people may think that the American landing on the moon is a scam. The US landing on the moon is actually not a scam. There is a reason why the United States left the moon to explore Mars instead of developing it.

It is said that the United States is the first and only country to send astronauts to the moon. If the United States is willing, it is fully capable of developing the moon first. Although the moon belongs to all mankind, as the first country to land on the moon, the United States has a great say in the development of the moon. However, the United States put the moon so close to it instead of developing it. Instead, it wants to send astronauts to Mars first. Does this mean that it doesn't want to develop the moon?

Compared with Mars, the moon has some advantages, but not all of them. The advantages of the moon are that it is closer to the earth, the acceleration of gravity on the surface is smaller, and the mineral resources are richer, but the moon is not without its shortcomings. The first point is that the moon has no atmosphere, so the temperature difference between day and night is very large, reaching more than 300 degrees Celsius. Besides, there is no water resource on the moon. If the moon is really developed, the estimated cost will be high.

After talking about the moon, let's talk about Mars. I would say that Mars is better than the moon. One is that the atmosphere of Mars is thin, which will make the temperature difference between day and night of Mars not too great, and there is no extreme temperature in most parts of Mars. The second is that there is water resources on Mars, although it does not exist in the form of liquid water, but there are a large number of ice sheets at the two poles of Mars, and there may be liquid lakes under the Antarctic ice sheet; Third, the resources on Mars are equally rich. There is a lot of dry ice on Mars, and methane fuel can be synthesized based on dry ice. In addition, the gravity acceleration of Mars is actually only about 38% of that of the Earth, which may be more suitable for migration than 1/6 of the moon.

The moon is the closest celestial body to the earth. Although it is not a planet, it is also an extraterrestrial object, not much smaller than the smallest planet Mercury, with a radius of about 765,438+0% of Mercury. It ranks fifth among about 200 satellites in the whole solar system and has the largest mass. Especially for the earth, the status is quite special.

Therefore, the moon has always been the most popular extraterrestrial body for human beings.

Apollo spacecraft carried out 17 missions. Apollo 1 was preparing to put a man into earth orbit, but an accident happened. Three astronauts died in a fire in the spaceship before taking off.

The next five Apollo missions were all unmanned flight tests. It was not until Apollo 7 that manned experiments began. First, they fly in the earth orbit, then they go to the moon orbit, and then they take the lunar module to the moon orbit. Finally, they flew to the place 15 kilometers away from the surface of the moon to do experiments before landing on the moon.

From Apollo 1 1, the manned mission to the moon was officially carried out, and until the end of Apollo 17, there were 7 manned flights and 6 successful landings. Send three astronauts to the moon at a time, of which 1 stays in the lunar orbital module (service module and command module) and flies around the moon waiting for arrival; Two men landed on the moon in the lunar module. The lunar module is divided into two parts, the lower part is the descending module and the upper part is the ascending module.

When landing on the moon, the upper module is connected with the lower module. The astronauts landed on the moon by the power of the low cabin. After completing the mission, they used the lower module as the launch support, separated up and down, took the ascending module to the lunar orbit and docked with the orbital module, then lost the ascending module and returned to the earth's home from the command module.

Does this mean focusing on the moon? If not, what is lying with your eyes open?

In addition to the manned landing on the moon in the United States, many countries have launched many probes to explore the moon. China has also launched many boats, and everyone knows what kind of place it is. Except for some mineral resources such as helium -3, it is actually a barren land. What kind of wool can be developed with human's current ability?

In that case, is it normal for America to stay on the moon every day? Isn't there something wrong with this idea?

The moon has been turned upside down by human beings, Venus is a hellish place, and Mars is the earth-like planet closest to the solar system and the earth's environment. Besides Venus, it is the closest planet to the earth. Isn't it normal for human beings to be interested in it?

Far-sighted scientists set their eyes on Mars, which is not far away and most like the earth, and regarded it as the first choice for human beings to immigrate from other places. Completely reasonable, in line with the current level of human civilization, there is really nothing to make a fuss about.

The problem is that so far, it is not easy to fly to Mars, and even unmanned probes are difficult to reach. Only the United States made a splash there, sending many probes and rovers to land successfully, exploring and working step by step. Several rovers have been working on Mars for more than ten years, and they are still tirelessly loyal to their duties.

Only India has successfully launched a Mars probe once, and the European Space Agency has also partially succeeded once. Other than that, there was no success. The former Soviet Union and Russia launched more than a dozen detectors, but none were found. Of course, the first Mars probe of Firefly-1, which China went with Russian probes, also failed.

It will be a training base and supply base for countries to go further into deep space, and it may also become a space base. If no country has passed the moon landing test, it is nonsense to talk about manned flight to further deep space.

The United States has announced that it will return manned to the moon around 2020. This time, it will land on the moon, establish a permanent base on the moon and establish a space station in the orbit of the moon. The main task is to land on Mars in the orbit and surface of the moon, and prepare for manned landing on Mars around 2033.

Now developing the resources there will cost tens of millions or even hundreds of millions of times the value of the resources themselves, which is not worth the candle.

But one thing is certain, the moon is an uninhabitable place, and it cannot be transformed into a place suitable for human habitation, so it will only exist as a springboard and base for human beings to go deep into space.

Therefore, the exploration of Mars and other space activities in the United States is a very normal space development and an inevitable process of human civilization and scientific progress in space-time communication. I don't understand why some people are always unwilling to learn and understand, but they never take others seriously. They always like to measure the world with their humble mentality.

What are you doing on the moon? It is too difficult to collect helium 3. Not for 50 years. It's a bit much to brag about how good helium 3 is now. Since helium 3 can't be received, let's study the moon corporation. Yes, the United States has been studying the moon, such as the Lunar Reconnaissance Orbiter (LRO) launched by the United States. There is no need to send someone to study the moon. It is expensive to give away. According to the Apollo moon landing plan at that time, it would cost almost $200 billion to convert into today's dollars, while it would only cost $8 billion to build an aircraft carrier. If you convince yourself to go to the moon again and again,

Mars is far away from the earth and mysterious. It is said that there were oceans on Mars a long time ago. Such a mysterious planet naturally wants to see it. Since we don't need to consider the resources of the moon for the time being, we must find something to do, and that is only Mars.

For Mars exploration, most exploration before 2000 ended in failure, among which the Soviet Union failed the most, and the United States succeeded in Mariner 4, 6, 7 and 9, and brought back a large number of Mars photos.

After 2000, Mars Odyssey Orbiter and Mars Reconnaissance Orbiter (MRO); Courage, opportunity, curious wanderer, etc. The United States began to shift its focus to Mars.

There is nothing illogical about exploring space. Exploring the moon and Mars is not contradictory, but in the current context, which is more valuable and which is the most suitable.

However, the United States is also planning to return to the moon, and Europe is also planning to build a moon village on the moon. China also has the follow-up missions of Chang 'e V, Chang 'e VI and Chang 'e VII, as well as the missions of landing on the moon and building bases. Eat the rice bit by bit, and plan to come one by one.

My humble opinion, welcome comments!

It is estimated that the subject is another person who wants to question whether the moon landing is fake or not. But what we need to know is that everything needs the cost and benefit of the donkey.

In fact, if we think about this problem from another angle, we know that if you have two plots of land, one is near the Huangpu River in Shanghai, Lujiazui or People's Square, and the other is in a small mountain village. And your resources are only enough to develop one, which one will you develop?

Will you resolutely choose a small mountain village? I wouldn't have done such a stupid thing if I hadn't had a hole in my brain.

In fact, to find out whether a celestial body is worth developing, we only need to detect and bring back samples. It is not the open moon that landed on the moon in full swing in the last century. More importantly, it shows comprehensive national strength. You know, the United States and the Soviet Union were fighting for hegemony. They range from aircraft tanks to drilling holes to the number of missiles and atomic bombs. The final peak confrontation is in the aerospace industry. Manned space flight is a thankless task, but it shows that the country's comprehensive national strength is strong enough. So both countries are desperately trying to land on the moon first.

When we return to the moon, we know that it has actually been tidal locking by the earth, that is, one side has always been facing the earth. Secondly, the moon has no atmosphere, so it can't stop cosmic rays at all, and it still keeps its own liquid water. The temperature difference between day and night is outrageous. The value of developing the moon is actually not great.

On the contrary, Mars has at least a thin atmosphere, water ice and carbon dioxide dry ice, and the temperature will not be as exaggerated as that of the moon. There are many other resources. There are only four rocky planets in the solar system. The situation of Mercury and Venus is very bad. Mars is a planet close to the earth, so the benefits of developing it are much greater than that of the moon.

Of course, Mars also has its shortcomings, that is, it is far away. However, weighing all factors, landing on Mars and developing Mars are still more profitable.

Weibo, what you said is also reasonable! I'm afraid I'll be exposed,