From the space station to the lunar rover, why are there no stars in the photos taken in space?

Unconsciously, three astronauts of China Space Station, Liu Boming, Nie Haisheng and Tang Hongbo, have been working and living in space for two months.

During these two months, they carried out a series of extravehicular activities and equipment installation, which lasted an astonishing seven hours, setting a new record in China's space history. With the help of Liu Boming and Tang Hongbo's camera lens, we can see the shocking scenes of space and the earth on the ground.

It can also be seen from the pictures sent back from the back that when the space station entered the sunny side, the sunlight from 65.438+0.5 billion kilometers away was very dazzling, and no stars could be seen, but this is understandable. After all, there is no atmosphere in space to absorb and weaken sunlight, and no stars can be seen during the day.

However, when the whole space station enters the shady side, the space in the camera lens is still dark, unlike the starry night sky of the earth, although the sun has been blocked by the earth.

It stands to reason that on the shady side of the earth where there is no atmospheric activity to interfere with the starlight, we should see the extremely bright sea of stars, but why can we only see a mass of darkness?

In the photos taken by the Yutu lunar rover from the moon, we can't see the stars either, only the concrete moon dust and craters in the distance.

In the earlier American landing on the moon, there were no traces of stars in the videos and photos taken by astronauts on the moon. Except the earth and the sun, the sky of the whole moon is as dark as a curtain. Therefore, many people question that the American moon landing was shot in a studio on the grounds that there were no stars.

Of course, the American landing on the moon must be true. After all, in the preliminary mission of Chang 'e series, China did capture the landing trace of American Apollo moon landing program, and the United States itself published tens of thousands of moon landing pictures on the Internet, which everyone can browse freely.

What is the reason why we can't see stars in space?

According to astronomers, you can actually see stars in space at any time, because the light in space is direct and there is no scattering, so the starlight will not be submerged by sunlight, but the "stars you see" are limited to the astronauts themselves, not including us on earth.

Because the audience on the earth looks at the space through the camera, we should consider the problem of light entering and overexposure of the camera. On the sunny side of the highlighted area, the camera must reduce the light input to take a normal exposure picture, and then display the images of astronauts and the earth. If you want to see the faint starlight, you have to increase the amount of light and extend the exposure time, but then the nearby astronauts and the earth will turn white because of overexposure.

As an image collector with stronger adaptability than the camera, the human eye can directly see the bright starry sky in the distance after adapting to the dark environment of space. However, if you want to see the starry sky in space on the earth, you must rely on the camera to expose it for a long time, so that the faint starlight can be captured by the camera as much as possible.

Decades later, when space travel is truly commercialized or even popularized, we earthlings will have the opportunity to go into space and enjoy the bright Milky Way and Xinghai with our naked eyes. As for whether to take a space elevator or a recyclable rocket like Musk, it is hard to say at present.

If our generation is lucky, it may catch up with the dawn of the space age, but it is only the dawn. The sunrise behind, the sun at eight or nine o'clock, belongs to the next generation or even the next generation in the final analysis.

The past is like running water, you can't chase it. In the long river of time, each generation has its glory and each generation has its joy.