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.
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Some articles on sky:
... Evening Twilight in Landers, California Sky above the clouds Water reflects Sky at Samurai Beach, Australia High Desert Summer Sunset Split Sky just after Sunset Sky over Green Pastures Approaching Dusk in ...
More definitions of "sky":
- (noun): The atmosphere and outer space as viewed from the earth.