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The sky is a common term for Earth's atmosphere, which is approximately 60 miles thick, according to NASA. The atmosphere is composed of different levels, with the exosphere marking the boundary of space. According to University at Albany, the exosphere observable from space extends 60,000 miles min


Four layers of the earth's atmosphere containing various gases make up the composition of the sky. The layers of the atmosphere are divided into the troposphere, the stratosphere, the mesosphere and the thermosphere. The atmosphere's divisions occur according to temperature fluctuations.


The sky ends at the Karman line, which is located at about 67 miles above sea level. Above this line, space begins. However, technically, the sky does not end so much as the atmosphere, or sky, thins until there is no oxygen left.


It has been theorized that street lamps based on solid-state lighting technology cause a form of light pollution known as "skyglow." Clouds increase the radiance of red light found in the skyglow by a factor of 17.6, giving cloudy nights in urban areas their reddish color.


The Moller M400 Skycar is a functioning flying car. The Skycar is street legal, although it is meant for short drives to vertiports. The flying car reaches speeds of up to 350 mph while in the air and 35 mph on the road.


On a clear day the sky is blue to deep blue. At dawn and dusk the stretch of sky nearest the sun changes to shades of red, orange and yellow. The color of the sky is primarily determined by the way air molecules scatter light relative to the sun's angle.


The sky appears blue because of the scattering of sunlight by atmospheric molecules, or Rayleigh scattering. Rayleigh scattering results in a blue sky because it is most noticeable at shorter wavelengths.


Maps of the night sky are available online from websites such as AstroViewer.com, Space.com and SkyandTelescope.com. There are also mobile apps that allow users to map the night sky in their immediate area. Night sky maps are available on both iTunes and the Google store for Apple and Android device


No special equipment is necessary to observe planets in the night sky. However, an observer can enhance his experience using a sky map and a beginner telescope or binoculars. An easy-to-use planisphere helps a gazer identify heavenly bodies that are above the horizon at any time of the day or night


The Big Sky Conference is a college sports conference that competes within the NCAA's Division I and the Football Championship Subdivision. The Big Sky Conference hosts teams primarily from the northwest United States. Teams within the conference compete in basketball, football, golf, tennis, track