Sky
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The sky, also known as the celestial dome, commonly refers to everything that lies a certain distance above the surface of Earth, including the atmosphere and the rest of outer space. In the field of astronomy, the sky is also called the celestial sphere. This is an imaginary dome where the sun, stars, planets, and the moon are seen to be traveling. The celestial sphere is divided into regions called constellations. Usually, the term sky is used from the point of view of the Earth's surface. However, the exact meaning of the term can vary; in some cases, the sky is defined as only the denser portions of the atmosphere, for example.
- Related: Cyanometer
| Day sky images Day sky images www.rayching.co.nz/sky.htm - Web |
| Night Sky images Night Sky images www.astronomy.net.nz - Web |
| Sky photo gallery Sky photo gallery www.hanifworld.com/Sky.htm - Web |
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| Why is the sky blue? Why is the sky blue? scijinks.nasa.gov/blue-sky - Web |
