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From Nordan Symposia
Jump to navigationJump to searchCreated page with 'File:lighterstill.jpgright|frame ==Etymology== [http://nordan.daynal.org/wiki/index.php?title=English#ca._1100-1500_.09THE_MIDDLE_ENGLISH_PERIOD Middle Engl...'
[[File:lighterstill.jpg]][[File:Sky.jpg|right|frame]]
==Etymology==
[http://nordan.daynal.org/wiki/index.php?title=English#ca._1100-1500_.09THE_MIDDLE_ENGLISH_PERIOD Middle English], cloud, sky, from Old Norse skȳ cloud; akin to [http://nordan.daynal.org/wiki/index.php?title=English#ca._600-1100.09THE_OLD_ENGLISH.2C_OR_ANGLO-SAXON_PERIOD Old English] scēo cloud
*Date: [http://www.wikipedia.org/wiki/13th_Century 13th century]
==Definitions==
*1 : the upper [[atmosphere]] or expanse of [[space]] that [[constitutes]] an apparent great vault or arch over the [[earth]]
*2 : [[heaven]]
*3 a : [[weather]] in the upper atmosphere
:b : [[climate]] <temperate English skies — G. G. Coulton>
==Description==
The '''sky''' is the part of the [[atmosphere]] or of outer [[space]] visible from the [[surface]] of any astronomical object. It is [[difficult]] to define precisely for several reasons. During daylight, the sky of [[Earth]] has the [[appearance]] of a deep [http://en.wikipedia.org/wiki/Blue blue] surface because of the air's scattering of [http://en.wikipedia.org/wiki/Sunlight sunlight]. The sky is sometimes defined as the denser [[gaseous]] zone of a [[planet]]'s atmosphere. At [[night]] the sky has the [[appearance]] of a black surface or region scattered with [[stars]].
During the day the [[Sun]] can be seen in the sky, unless obscured by clouds. In the night sky (and to some extent during the day) the [[moon]], [[planets]] and [[stars]] are visible in the sky. Some of the [[natural]] [[phenomena]] seen in the sky are clouds, rainbows, and [[aurora]]e. Lightning and precipitation can also be seen in the sky during storms. On Earth, birds, insects, aircraft, and kites are often considered to fly in the sky. As a result of [[human]] [[activities]], smog during the day and light [[radiance]] during the night are often seen above large [[cities]] (see also light pollution).
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]].[http://en.wikipedia.org/wiki/Sky]
[[Category: Earth Science]]
[[Category: Astronomy]]
==Etymology==
[http://nordan.daynal.org/wiki/index.php?title=English#ca._1100-1500_.09THE_MIDDLE_ENGLISH_PERIOD Middle English], cloud, sky, from Old Norse skȳ cloud; akin to [http://nordan.daynal.org/wiki/index.php?title=English#ca._600-1100.09THE_OLD_ENGLISH.2C_OR_ANGLO-SAXON_PERIOD Old English] scēo cloud
*Date: [http://www.wikipedia.org/wiki/13th_Century 13th century]
==Definitions==
*1 : the upper [[atmosphere]] or expanse of [[space]] that [[constitutes]] an apparent great vault or arch over the [[earth]]
*2 : [[heaven]]
*3 a : [[weather]] in the upper atmosphere
:b : [[climate]] <temperate English skies — G. G. Coulton>
==Description==
The '''sky''' is the part of the [[atmosphere]] or of outer [[space]] visible from the [[surface]] of any astronomical object. It is [[difficult]] to define precisely for several reasons. During daylight, the sky of [[Earth]] has the [[appearance]] of a deep [http://en.wikipedia.org/wiki/Blue blue] surface because of the air's scattering of [http://en.wikipedia.org/wiki/Sunlight sunlight]. The sky is sometimes defined as the denser [[gaseous]] zone of a [[planet]]'s atmosphere. At [[night]] the sky has the [[appearance]] of a black surface or region scattered with [[stars]].
During the day the [[Sun]] can be seen in the sky, unless obscured by clouds. In the night sky (and to some extent during the day) the [[moon]], [[planets]] and [[stars]] are visible in the sky. Some of the [[natural]] [[phenomena]] seen in the sky are clouds, rainbows, and [[aurora]]e. Lightning and precipitation can also be seen in the sky during storms. On Earth, birds, insects, aircraft, and kites are often considered to fly in the sky. As a result of [[human]] [[activities]], smog during the day and light [[radiance]] during the night are often seen above large [[cities]] (see also light pollution).
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]].[http://en.wikipedia.org/wiki/Sky]
[[Category: Earth Science]]
[[Category: Astronomy]]
