Astronauts are not afraid of sacrifice. Why do they feel afraid of looking at the earth from the moon?
Humankind has been developing and multiplying on the earth for millions of years. From being a pitiful place on the African savannah, to the top of the food chain. There are fewer and fewer areas on the earth that can be explored by humans. The two polar regions, the deepest Mariana Trench and the highest Everest Peaks and so on have human footprints.
Humanity originated in Africa, and eventually spread all over the world with the expansion At the same time, with the development of aerospace science and technology, mankind has flown out of the earth and into space. At the end of World War II in the last century, the United States and the former Soviet Union entered the Cold War period. In addition to military competition, the two countries competed in the fields of space exploration, deep-sea exploration, and geocentric exploration, although the purpose was not so pure. The development of science and technology, but the result is still good, which has greatly promoted the development of mankind in the field of space.
The Soviet Union took the lead in launching the first human satellite and The United States has fallen behind in these two aspects when mankind sent the earth. Therefore, it is determined that it is necessary to take a step ahead in the exploration of the moon. Of course, this step is relatively large. The United States successfully completed the feat of manned landing on the moon and moved back to its decline in one fell swoop.
So far, a total of 12 astronauts have landed on the moon. Of course, only they have looked back at the earth from the moon. Why do some people think that looking back at the earth from the moon will feel fear?
The picture above is more famous. It is from 1968 Apo The photos taken by the astronauts during Luo 8’s mission are called”Earth Outs.” Of course, no astronauts landed on the moon this time. They were just going around the moon for technical verification and for the subsequent manned moon landings. ready. The view of the earth seen from the moon is completely different from the view of the moon on the earth. First of all, there is a difference in size. The apparent diameter of the moon is about 0.52 degrees, while the apparent diameter of the earth when viewed from the moon is about 1.9 degrees.
In simple calculations, the size of the earth when looking back on the moon is about 14 times that of the full moon. Humans have developed and multiplied on the earth for millions of years. They have never seen such a large celestial body in person. There is a certain amount of pressure, so I feel fear.
In addition, the moon is locked by the earth’s tides, resulting in Its rotation period is strictly equal to the revolution period, which is about 28 days. The front of the moon has always been facing the earth. Human beings have never seen the back of the moon with their own eyes on the earth. Therefore, the back of the moon is more mysterious to humans. At the same time, there is a problem, that is, you can never see the earth from the back of the moon. On the front of the moon, it will be found that the earth has been hanging in the air, which will also bring psychological pressure to people.
Besides these factors, the most important thing is that there is no sense of security in my heart, because looking back at the earth on the moon, you must know that the distance between the two is 380,000 kilometers. Seeing the earth hanging in the sky, there is Human beings have the only living homeland, and the moon on which they are located is a barren planet.
There is no atmosphere close to absolute vacuum on the moon, so You must wear a heavy spacesuit for the cabin activities. If there is a slight failure, the result is obvious, and you will face suffocation or even blood boiling death on the moon. And there is a very large temperature difference between day and night on the moon. When the temperature is high, it can reach 120 degrees Celsius, and when the temperature is low, it is about minus 180 degrees Celsius. Therefore, the temperature difference between day and night can reach 300 degrees Celsius. Everyone needs to enter a dormant state to protect their own parts.
The moon is a dangerous planet for humans , Seeing the unattainable earth in the sky in a dangerous place, the only home of mankind, will definitely not be joyful, but will only be abnormal fear. Although the home is hung in the sky, it is far away. If there is a crisis on the moon, it will be difficult to get effective rescue.
So when mankind looks back at the earth on the moon, the most essential reason for feeling fear is the fear of the surrounding environment. Because of their insecurity, seeing their homes hanging in the sky, It can be scary.
These fears must be overcome, in fact From the heart. The moon is the closest natural celestial body to the earth, only 380,000 kilometers away from the earth, and like Mars, which humans are keen to explore, it must be thousands of kilometers away from the earth when it is closest, and hundreds of millions of kilometers at the farthest. Looking back at the earth from these celestial bodies, it also makes people feel terrified, and even on the way to it will suppress people’s psychology.
Therefore, aerospace agencies of many countries will conduct corresponding experiments to establish closed simulation homes on the earth. For example, NASA has conducted closed experiments, allowing 3 males, 3 females and 6 scientists to live in a confined space for nearly 1 Years, their biggest feeling is their inner loneliness and separation from the original world.
So the moon looks back at the earth, although it looks like a The sky is as high as a porcelain plate, and it looks very beautiful, but its existence always reminds the astronauts on missions on the moon that they are on a dangerous planet 380,000 kilometers away from their hometown. There is no chance for any problems. Rescued.
Text/scientific black hole, image source network invasion and deletion.