Since ancient times the sky attracted and attracted to itself the beauty and inaccessibility. Ancient people worshipped Gods living in heaven, asked from the sky to send them a rain or the sun. And today the clear clear sky or on the contrary gray, heavy and low, attracts looks not only creative people, but also ordinary inhabitants of Earth, practically all, without exception.
At least once in life each person could think of a question why color of the sky changes? Why sunset red, but not green? Why at night the sky blackens? Not all people know answers to these questions. As the reason of change of color of the sky serve the smallest parts of different substances, including gas, dust and other which contain in the atmosphere. The sun radiates beams of white light to Earth. On the way these beams meet various molecules, for example oxygen molecules. Passing through them, light refracts, and at the exit several beams of various color turn out. The sky in good weather appears to our looks in blue color because this color brighter, than all other colors on which white solar color is displayed. The blue sky is so attractive to looks, wrote verses about it, drew pictures. However, in the summer when on the street there is long time an intolerable heat, nothing can please the person, even this magic, blue heavenly light.
The closer the sun falls to the horizon, the bigger corner light refractionsof it is formed, and blue beams dissipate, and red all in bigger concentration reach our eyes. Therefore a picture in the sky at sunset such amazing. Red light mixes up with other beams, giving to a sunset inexpressible attractiveness and charm. Night sky the most surprising. In a clear weather in the night sky all constellations are perfectly looked through, it is not possible to compare depth of the black sky to anything. At night sunshine do not get to Earth in our part of the world therefore no light is reflected, and the sky looks black. Our Universe – a unique body, which absolutely black, not reflecting any beams and fully absorbing all waves, such as thermal, radio waves and others. For this reason at night so darkly, and light streams from one billion stars are completely absorbed by space. At all times night bewitched mankind the extraordinary beautiful and mysterious black star sky attracting the secrets.