Did NASA "cheat" the astronauts of Shenzhou XIII when they left the cabin and exposed the original appearance of space?

Humans live on a planet shrouded in a thick atmosphere. For millions of ye

Did NASA "cheat" the astronauts of Shenzhou XIII when they left the cabin and exposed the original appearance of space?

Humans live on a planet shrouded in a thick atmosphere. For millions of years, we can only look up at the stars on the ground, and we don't know enough about the true shape of the universe. However, with the progress of technology, we are closer to the real face of the universe. The atmosphere protects us and blocks our sight, which has become one of the obstacles on the road of space exploration.

In fact, all the celestial bodies we see on earth are refracted through the atmosphere, so they will be different from those in the universe. Since the middle of last century, human beings have officially stepped into space. Spacecraft and astronauts brought back a series of real photos about the universe, which greatly enriched people's experiences and broadened people's horizons.

As the saying goes, "Seeing is believing", our senses reflect the objective attributes of things to some extent, such as their color, size, sound and so on, which is the main way for us to know the world. However, human sensory function is also very limited, which is different from other "special" creatures. For example, humans can't compare with birds with excellent eyesight, dogs with keen sense of smell, and antelopes that run very fast. ...

However, we are aware of this limit, so we have made various tools to help us. For example, when observing stars, we need to use astronomical telescopes. Even, people have launched an optical telescope satellite into earth orbit, namely Hubble telescope, to observe space all the time outside the atmosphere.

During the "Cold War" of last century, the two superpowers, the United States and the Soviet Union, fought for hegemony for a long time, including science and technology, especially space exploration. The competition between the two countries is fierce. The Soviet Union first sent man-made satellites into space, and then the United States also conducted successful experiments. Therefore, the Soviet Union immediately started the manned space program, sending yuri gagarin, the first astronaut in the world, into space.

However, the Soviet Union was not satisfied with this, and soon launched the "Ascension II" spacecraft, allowing astronauts to leave the spacecraft for a "spacewalk", making astronaut leonov the first person to really go into space. In such an environment, human beings can finally look back at the earth in the vast universe and feel that we are extremely close to our homes and extremely far away.

After the astronauts' extravehicular work technology gradually matured, people began to think about the possibility of establishing a "base" in space, which is the space station. Many space capsules are connected together to form an orbital base for astronauts to live, experiment and observe for a long time, and the cargo hold can be continuously launched for replenishment.

The most famous space station in the world is the International Space Station, which has been under construction since the end of last century. With the help of the United States, Russia and many developed countries, it has been officially put into use for many years, and has achieved a lot of experimental results, making an indelible contribution to the study of the human universe.

Compared with superpowers such as the United States and the Soviet Union, it takes time and effort to develop space technology, and it is even more difficult for China to develop space technology. We launched the first artificial satellite "Dongfanghong-1" in the 1970s, but it was not until the beginning of this century that we officially sent astronauts into space.

Fortunately, since the end of last century, our space has developed by leaps and bounds. After Shenzhou 5 sent astronauts into space for the first time, Shenzhou VII completed the spacewalk mission, and now our own space station has been put into use. This is an amazing development speed for any country in the world, and it also reflects that China's national strength is constantly increasing.

Shenzhou XII sent three astronauts to the core module of China Tiangong Space Station, representing the official operation of China Space Station. During the construction of the former International Space Station, China was refused to join by other countries because of its insufficient technical capacity. But now we have built our own space station, which has to be said to be an inspiring story.

After the mission of Shenzhou XII was successfully completed and three astronauts returned to the motherland safely, we launched Shenzhou XIII on 20211kloc-0/6. This time, three astronauts will stay in our space station for six months, during which they will also do extravehicular work. The work of astronauts will always report to the motherland and people, and we can see these space heroes walking in space.

After seeing the Shenzhou 13 astronauts leave the cabin, people not only lamented the remarkable progress of China's space technology, but also saw the original appearance of the exposed space: in the picture, except for the astronauts themselves and the space station spacecraft, only the extremely bright sun can be seen, which looks more dazzling than the sun seen on the earth, and beyond that, it is a vast space with only strong darkness, neither sunlight nor anything else in the universe.

In our impression, besides the dark space, there should be many twinkling celestial bodies in space. Our earth is a beautiful and huge blue planet.

Why can't even see the earth and there are not many stars in the space station? Looking back at the photos we saw about the universe, many of them were released by NASA. Have we all been cheated by NASA? In fact, to be precise, NASA did "cheat" us, but this kind of "cheat" is not what we thought. It is not divorced from the facts in essence, but has undergone some special treatment.

For example, we know that there are thousands of stars in the universe, but it is difficult for the naked eye to see them after leaving the atmosphere, and NASA photos have made the darkness in the original naked eye look familiar after some optical processing.

Why can we see the bright stars on the earth? This has something to do with the atmosphere. When light passes through the atmosphere, it will be scattered. It is not difficult to find that as long as it is in the daytime, even if it is not directly exposed to the sun, it will be much brighter than at night. This is the scattering and reflection caused by the earth's atmosphere and substances on the earth.

In space, there is no atmosphere, and the matter in space is very scarce, so it is difficult for us to see other stars except self-luminous stars. In addition to this reason, we see that NASA photos are so gorgeous, and it is also because researchers deal with some types of light, and we are "invisible".

In fact, if we look for some original photos taken by American astronauts in space missions, we will find that they are actually similar to the scenes when the astronauts of Shenzhou XIII went out to work. The main body of the picture is the light emitted by astronauts, spaceships and stars (mainly the sun), and other places are also dark.

This is caused by the limitation of viewing angle and post-processing. We can see that the Hubble telescope can shoot beautiful starry sky because its own perspective is in the direction of outer space, or a part of this direction will be enlarged to show distant stars, galaxies or clusters, and the influence of the sun is no longer so strong.

In addition, there are indeed many invisible rays in space, because the performance of human eyes is limited. The wavelengths of light we can see range from red to purple, and other wavelengths are called "infrared" and "ultraviolet". Not only does the sun emit invisible light, but other stars also emit invisible light.

We can know the existence of these rays, thanks to various optical and photographic instruments, which can do more than human eyes, that is, capture these invisible rays. Many of the photos we see are the results of researchers' processing of invisible light captured by instruments. In fact, the universe is really so brilliant.

Why did NASA process these photos? Because if the photos released to ordinary people don't do this, I believe most people will think of unknown so and don't know what it means. In order to let people know the universe better and more intuitively, appreciate the greatness and magnificence of this starry sky, and let people have a clearer understanding of astronomy and aerospace research, the researchers chose to do so.

In fact, these photos do have such an effect, so many people yearn for the universe and are willing to understand space itself and human space engineering. Perhaps among these people, there are future astronomers and rocket engineers.

Today, China is also developing space exploration, not only building a space station, launching exploration satellites to the moon and Mars, but also landing on these planets for detailed research, which makes our space industry at the forefront of the world and has made great achievements in exploring the more distant exouniverse.

The 500m spherical radio telescope (FAST), the 500m spherical radio telescope built by China, is the largest radio telescope in the world at present, and hundreds of new pulsars have been discovered. China is increasingly shouldering the responsibility of being a big country in science and technology for the scientific and technological progress and development of all mankind.

Since the middle of the last century, the United States has indeed conducted long-term space research, and even became the only country in the world that let astronauts land on the moon. Although the development of China is very rapid, we need to consult modestly in many aspects and make up for our own shortcomings with past experience in order to achieve better development in the future.

Human beings have accumulated countless data and experiences in space exploration for decades, but these contents are only a negligible part of the whole universe, and we are far from stopping.

The completion of the China's?Tiangong?space station not only means that researchers in China have an excellent place to use, but also welcomes researchers from other countries to have friendly exchanges in the future, and helps the scientific development of all mankind with the latest technology in China, so that our civilization can continue to extend into outer space, from the limited earth to the infinite universe, and it is also possible for human history to continue to extend. At that time, the starry sky we saw may be completely different from now.