Sky....!

Sky is part of the surface from the surface. The atmosphere and space are also part of it.

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In astronomy, the sky is called the b-circle . From the surface it is imagined to be a mythical sphere where the sun , stars, moons and planets are seen to travel. B-sphere is usually divided into different constellations. Generally the word sky is used to indicate any point above the surface of the earth. But its meaning and usage may be different. For example, in the case of the sky, the sky refers to only the dense part of the lower atmosphere.

The sky looks blue for daylight light scattering. And at night, the sky looks like a black carpet full of stars. If there is no cloud during the day, there is sun in the sky. And in the night sky (sometimes in the day) the moon, planets and stars are visible. Natural phenomena such as clouds, raindrops, aurora or polar bear, thunder, etc. are observed in the sky.