The stars and the Milky way over the city

Once the vast sky now can only stay in the memory of childhood in the dark blue sky, twinkling stars, so the natural beauty of the night sky, for most people in the city, has become the memories of childhood, now living in the city in children is rare to see the stars of the night sky and the radiant beauty of the Milky Way. In addition to air pollution, there is an important reason is because the city too much artificial light into the sky, increasing the brightness of the night sky in the city, thereby reducing the visibility of the night sky. The bright sky is like a veil over the human eye. For this reason, people are accustomed to not looking into the sky at night. Because the city light pollution serious reasons, the city could not see the bright sky at the Milky Way, 2/3 of the world's population has not seen the Milky Way, now only less than 200 in most of the city to see the stars. Light pollution makes the night city under the shining sky, people gradually lose the true meaning of the night. Although mankind has made a considerable effort to control light pollution, but in recent years is still in the sky glow to the global expansion, although it will be difficult to predict the annual quantitative increase in number, but research has shown that the sky brightness growth rate of not less than 3%, if the growth at this rate, after 23 years will double the brightness of the night sky. Source: Internet reprinted aims to deliver more information, does not represent the agree with their views and be responsible for its authenticity. If you have any objection please contact 1553190422