September 1 my country's Shenzhou 14 astronauts Chen Dong and Liu Yang Get out of the hatch smoothly This is the first time that Chinese astronauts have exited the space station through the main channel. The airlock of the Wentian experimental module enters space Image source: China Manned Spaceflight However, careful friends will find In the footage of astronauts leaving the spacecraft The starry sky behind the astronaut is actually pitch black Where have all the stars in the vast sky gone? The light of stars is "filtered" by the camera IAF Space Transportation Committee Vice Chairman Yang Yuguang said The cause of this phenomenon It's not that these stars "disappeared mysteriously" Rather, it is the result of the "selection" of the camera exposure parameters. That is to say The photographer used technical means Make the stars in your photo or video Invisible in deep space Image source: China Manned Spaceflight Yang Yuguang said, in the universe Stars are the darker subjects on the contrary Space station and astronauts under sunlight It will become very bright Cameras cannot "see" bright objects at the same time "See clearly" very dark objects During extravehicular activities Take clear photos of astronauts, space station modules, and Earth's details are a priority That is, bright objects are used as the standard Set the corresponding camera exposure parameters What's different about looking at stars from space? The images of astronauts leaving the cabin "filter" the stars So can astronauts in space see the stars? Are they the same stars we see on Earth? Researcher at the National Astronomical Observatories of the Chinese Academy of Sciences Ping Jinsong pointed out There is no atmospheric scattering in space Sunlight travels in straight lines So the space won't be completely illuminated. In the dark space Astronauts can see the sky full of stars Image source: China Manned Space Engineering Office Photo by astronaut Tang Hongbo As the astronauts stepped out of the hatch If you look at the earth Eyes adapt to bright objects At this time, I looked up at the dark universe You may not be able to see the stars clearly for a while. But the human eye is very adaptable After your eyes adapt to the darkness Then you can see the stars Yang Yuguang said October 15, 2003 Astronaut Yang Liwei on board the Shenzhou V manned spacecraft The first space gaze of Chinese astronauts began According to his recollection The moon and stars seen from space More clear and transparent The stars don't blink Stars seen by astronauts in space It's really different from what we see on Earth. Yang Yuguang said There are factors such as atmosphere and artificial light on Earth. Blockage or interference Makes starlight weaker It will also "flash" There are also fewer stars visible to the naked eye In space Since there is no atmospheric obstruction or shielding The stars observed by astronauts have three characteristics Less flicker, clearer and brighter, more in quantity Image source: China Manned Space Engineering Office Photo by astronaut Tang Hongbo Ping Jinsong also said Space is a vacuum No atmospheric turbulence So the stars don’t blink There are only stars, no stars twinkling Therefore Whether it is around a star, a planet or the moon, No dizziness or halos The stars are brighter Source: Science and Technology Daily ◎ Science and Technology Daily reporter Tang Fang Editor: Zhang Qiqi Review: Julie Final judge: Wang Yu The cover image of this article is from the copyright library and is not authorized for reproduction |
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