What happened to the star-spangled banner planted by the United States 50 years ago?

50 years ago, 1965, represented by the United States, successfully landed on the moon, representing the first time that human beings came to celestial bodies outside the earth. At that time, people thought that mankind had entered the space age and began to cheer loudly, thinking that immigration to the moon would be realized soon in the near future.

However, this is not a flash in the pan in the space race between the two superpowers. After four rounds of bombing, the Soviet Union finally gave up the moon landing plan, and the United States was finally a little tired after burning 25 billion dollars (25 billion dollars 50 years ago) and planting four flags on the moon. After so many years, the moon landing never came back. At that time, there were no resources to be developed, and it was not appropriate to claim that the first man on the moon had obtained the ownership of the moon. After all, the whole world will stand up against it.

So after 1972, the United States ended this plan, and the dream of human space age ended before it started. ...

After the Soviet Union was completely defeated by the United States and dominated the world, the United States had even less motivation to show off on the moon. So until today, there has never been a moon landing.

Many people question that the moon landing plan is false. There is no need to be influenced by conspiracy theories. The biggest problem of conspiracy theory can explain any problem and will not help our future development.

There are two main arguments that can be regarded as debunking conspiracy theories:

First of all, there are tens of thousands of participants in the Apollo program. If it is a well-planned fraud, it is absolutely impossible to keep all the secrets. Snowden leaked the eavesdropping prism plan for several years, which has a wider impact. How is it possible that no real political party has stood up to support the moon landing program in the past 50 years?

Second, although no country has sent overloaded people to the moon again, many countries, especially the Soviet Union, have sent probes to the moon. Soon after they landed on the moon, there were lunar satellites to verify it, and in fact, there were many photos of spacecraft landing on the moon taken by other countries in recent years. For example, Apollo 1 1, 12, 14,15,65438+in the panoramic view of the moon taken by Chang 'e II in 2065438. If the Soviet Union, which hates its teeth, is not caught, there is no reason for other countries to keep secrets for the United States.

There are also many people holding pictures of the stars and stripes flying and asking why there is no air on the moon. In fact, as long as you are willing to take a closer look, you will find that it doesn't float at all ... How can a floating thing keep a posture forever? Obviously, there is a crossbar to pull it up, and the wave shape is just the shape left when it is rolled into a ball.

So, 50 years later, are these flags all right now? Can the symbol of America last forever?

Everyone knows that there is no atmosphere on the moon, no wind and rain, no oxidation corrosion. But in fact, this does not mean that the objects on the surface of the moon can be preserved forever. In fact, some things on the moon can be preserved almost forever, such as metals, but some things will corrode much faster than on the earth, such as pigment molecules and organic polymers.

Why is this? Because the moon has no atmosphere and no ozone layer, ultraviolet rays will directly irradiate objects. The ozone layer of the earth filters 98% ultraviolet rays, but we still think that the ultraviolet rays in summer are too strong. Imagine that ultraviolet rays are 50 times stronger than the strongest ultraviolet rays on earth!

Plastics and pigments have faded for a long time on the earth, entirely because of ultraviolet rays, which are high-energy rays that directly inject energy into the chemical bonds of molecules. It turns out that the essence of chemical bond formation is that atoms get close to each other by losing energy, and ultraviolet light energizes you. As a result, the chemical bond breaks, and the macromolecules become small molecules, and the small molecules directly become gas molecules that can escape. This phenomenon is called photochemical corrosion.

Coupled with the long alternation of day and night on the moon, the highest127 C and the lowest-183 C are 15 days at a time, and things that will fade in the earth for decades will be corroded on the moon in less than one year.

Interestingly, the American flag planted on the moon is not a high-tech product. It is a mass-produced product produced by the old flag manufacturer "Anning Banner", and the price is $5.50 per side. It is made of nylon (polyamide fiber), and the pigment is very common.

So, it was probably not long before the flag was planted, and the color had faded almost, becoming a "white flag."

It has been 50 years now, so it is possible that even the molecules of nylon have been destroyed and become scattered dust. If it is true, it may be a polished rod inserted on the surface of the moon.

Not only the national flag, but all organic polymer materials will disappear. For example, the wheels of the lunar rover that astronauts used to ride on must have been corroded by ultraviolet rays, and only the metal and footprints will remain unchanged for thousands of years.