British tourism photography

Because the lights in the city are too bright, the pollution in the city is relatively large.

Now more and more artificial light sources are widely used, especially in big cities. All kinds of lights reflect the night sky, which means what we call light pollution. The newly lit artificial moon will light up Chengdu in 2020! But it has extinguished the dream of looking up at the starry sky, and the industrial revolution as we know it has indeed brought unprecedented remarkable progress in science and technology, civilization and productivity, followed by changes in air pollution, smog and PH2.5 standards in recent years! Turbid air scatters the light that was directly injected into the air to a lower place, which reduces the visibility of night vision observation to a greater extent.

The biggest enemy to perceive the starry sky is all kinds of extra light, just like the sunlight in the daytime makes the stars hide, and the artificial light at night makes the stars dim and only the brightest stars can be seen. The Milky Way was originally a dim band of light in the sky, and only in the dark environment will it show its brilliance and brilliance. In the face of huge future projects such as artificial city lights, even artificial moon and artificial sun, it is diluted into fluorescence by the light of the former!

Someone used to ask children how many stars there are in the sky, but now it is estimated that every child can count them clearly, only a few! There used to be countless starry sky, but now there are countless ground lamps. According to statistics, at least two-thirds of people in the world can't see the Milky Way. For poor urban residents, the Milky Way has long been a legend. Today, only the screen of the planetarium can let the city people return to nature, experience the splendid civilization of the Milky Way, and feel the Big Dipper, the Cowherd and the Weaver Girl, and the myriad constellations.

The milky way in winter, the milky way in summer. If we leave the city to look for the Milky Way, will the Milky Way in winter be different from the Milky Way in summer? On the Earth about 30,000 light years away from the center of the Milky Way, we see different images of the Milky Way in different seasons. The silver heart is located in Sagittarius, which is a summer constellation, so the Milky Way is brighter in summer. On the contrary, the Milky Way we see in winter looks dim. Interestingly, there are so many stars in winter that they are born to be an extra thing for stargazers in winter? Welfare? All right.

But those are just fake after all. How do cars compare with car toys? What's more, the whole earth is a drop in the bucket in the Milky Way, not to mention the unnatural celestial bodies created by manpower, material resources and financial resources all over the country. However, the progress of science and technology inevitably hopes that human beings can solve complex problems more reasonably when exploring the future!