First, the reason:
1, the reason why the stars blink is because of the influence of atmospheric refraction. Stars seem to jump in the night sky, which is due to the refraction of starlight when it passes through different density air layers, leading to the observed alternation of light and shade.
2. The twinkling of stars is caused by many factors. Atmospheric refraction, brightness and size of stars, rotation and parallax of stars, and light pollution will all affect our observation of stars. This phenomenon is very common and can be seen in the night sky all over the world.
Second, other reasons:
1, atmospheric refraction phenomenon: Because of the existence of the atmosphere, when the star is at a low angle, the starlight needs to pass through more atmospheric parts, and the influence of refraction is more obvious, which is why the star is easy to jump near the horizon. This phenomenon is called atmospheric refraction.
2. Brightness and size of stars: In addition to atmospheric refraction, the brightness and size of stars also cause their flicker. When stars are at the low point of their bright period, they will look darker, which can make them more difficult to distinguish, and sometimes even appear when the human eye can't feel them.
3. Rotation and parallax of stars: Rotation and parallax of stars may also cause stars to flicker. Just as the rotation of the earth will cause celestial bodies to appear and disappear in our field of vision, stars will also affect human observation because of their own rotation. In addition, because the earth moves around the sun, every star we see has a slight displacement, which is the parallax effect and may also cause the stars to blink.
4. Light pollution: Light pollution may also cause stars to twinkle. The city lights usually become very bright at night, which will cause the eyes to adapt to their brightness and make the surrounding darkness appear darker. This makes us feel the stars flicker and blink more often, because the influence of light causes our pupils to adjust constantly.