Sky
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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Famous quotes containing the word sky:
“He who, from zone to zone,
Guides through the boundless sky thy certain flight,
In the long way that I must tread alone,
Will lead my steps aright.”
—William Cullen Bryant (1794–1878)
“The sky is the daily bread of the eyes.”
—Ralph Waldo Emerson (1803–1882)
“If the sky stands still, if the earth quakes, if there is famine, if there is pestilence, at once the cry is raised: Throw the Christians to the lions! So many to one?”
—Tertullian (c. 150–230)