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From Nordan Symposia
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[[File:lighterstill.jpg]][[File:Midsummers_dawn2.jpg|right|frame]]
==Etymology==
[http://nordan.daynal.org/wiki/index.php?title=English#ca._1100-1500_.09THE_MIDDLE_ENGLISH_PERIOD Middle English], probably back-formation from dawning daybreak, alteration of dawing, from [http://nordan.daynal.org/wiki/index.php?title=English#ca._600-1100.09THE_OLD_ENGLISH.2C_OR_ANGLO-SAXON_PERIOD Old English] dagung, from dagian
*Date: [http://www.wikipedia.org/wiki/15th_Century 15th century]
==Definitions==
*1 : to begin to grow [[light]] as the [[sun]] appears to rise
*2 : to begin to [[appear]] or [[develop]]
*3 : to begin to be [[perceived]] or [[understood]] <the [[truth]] finally dawned on us>
==Description==
'''Dawn''' is the [[time]] that marks the beginning of the [http://en.wikipedia.org/wiki/Twilight twilight] before [http://en.wikipedia.org/wiki/Sunrise sunrise]. It is recognized by the [[presence]] of weak sunlight, while the [[sun]] itself is still below the [[horizon]]. Dawn should not be [[confused]] with sunrise, which is the [[moment]] when the leading edge of the sun itself appears above the [[horizon]].
The duration of the twilight period between dawn and sunrise varies greatly depending on the [[observer]]'s [[latitude]], from a few minutes in [http://en.wikipedia.org/wiki/Tropics equatorial regions] to many hours in [http://en.wikipedia.org/wiki/Polar_region polar regions]. Dawn may easily be [[determined]] by observing a thread. When the color of a thread can be determined, changing from black to the threads distinctive [[color]], the 'crack of dawn' has occurred. This same measure of ambient light can be used to determine, conversely, the instant of 'dusk'.[http://en.wikipedia.org/wiki/Dawn]
[[Category: General Reference]]
[[Category: Earth Science]]
==Etymology==
[http://nordan.daynal.org/wiki/index.php?title=English#ca._1100-1500_.09THE_MIDDLE_ENGLISH_PERIOD Middle English], probably back-formation from dawning daybreak, alteration of dawing, from [http://nordan.daynal.org/wiki/index.php?title=English#ca._600-1100.09THE_OLD_ENGLISH.2C_OR_ANGLO-SAXON_PERIOD Old English] dagung, from dagian
*Date: [http://www.wikipedia.org/wiki/15th_Century 15th century]
==Definitions==
*1 : to begin to grow [[light]] as the [[sun]] appears to rise
*2 : to begin to [[appear]] or [[develop]]
*3 : to begin to be [[perceived]] or [[understood]] <the [[truth]] finally dawned on us>
==Description==
'''Dawn''' is the [[time]] that marks the beginning of the [http://en.wikipedia.org/wiki/Twilight twilight] before [http://en.wikipedia.org/wiki/Sunrise sunrise]. It is recognized by the [[presence]] of weak sunlight, while the [[sun]] itself is still below the [[horizon]]. Dawn should not be [[confused]] with sunrise, which is the [[moment]] when the leading edge of the sun itself appears above the [[horizon]].
The duration of the twilight period between dawn and sunrise varies greatly depending on the [[observer]]'s [[latitude]], from a few minutes in [http://en.wikipedia.org/wiki/Tropics equatorial regions] to many hours in [http://en.wikipedia.org/wiki/Polar_region polar regions]. Dawn may easily be [[determined]] by observing a thread. When the color of a thread can be determined, changing from black to the threads distinctive [[color]], the 'crack of dawn' has occurred. This same measure of ambient light can be used to determine, conversely, the instant of 'dusk'.[http://en.wikipedia.org/wiki/Dawn]
[[Category: General Reference]]
[[Category: Earth Science]]
