Changes

[[File:lighterstill.jpg]][[File:Linthal_twilight.jpg|right|frame]]

[[File:lighterstill.jpg]][[File:Linthal_twilight.jpg|right|frame]]

*[http://en.wikipedia.org/wiki/15th_century 15th Century]

*[https://en.wikipedia.org/wiki/15th_century 15th Century]

==Definitions==

==Definitions==

*1: the [[light]] from the [[sky]] between full [[night]] and [[sunrise]] or between sunset and full night produced by [[diffusion]] of sunlight through the [[atmosphere]] and its dust; also : a time of twilight

*1: the [[light]] from the [[sky]] between full [[night]] and [[sunrise]] or between sunset and full night produced by [[diffusion]] of sunlight through the [[atmosphere]] and its dust; also : a time of twilight

'''Twilight''' is the time between [[dawn]] and sunrise, and between [[sunset]] and [[dusk]]. Sunlight scattered in the upper [[atmosphere]] [[illuminates]] the lower atmosphere, and the [[surface]] of the [[Earth]] is neither completely lit nor completely dark. The [[sun]] itself is not actually visible because it is below the [[horizon]]. Owing to the unusual [[quality]] of the ambient light at this time, twilight has long been popular with photographers and painters, who refer to it as the "blue hour", after the French [[expression]] l'heure bleue. Twilight is [[technically]] defined as the period before sunrise and after sunset during which there is [[natural]] [[light]] provided by the upper [[atmosphere]], which receives direct sunlight and scatters part of it towards the [[Earth]]'s [[surface]].

'''Twilight''' is the time between [[dawn]] and sunrise, and between [[sunset]] and [[dusk]]. Sunlight scattered in the upper [[atmosphere]] [[illuminates]] the lower atmosphere, and the [[surface]] of the [[Earth]] is neither completely lit nor completely dark. The [[sun]] itself is not actually visible because it is below the [[horizon]]. Owing to the unusual [[quality]] of the ambient light at this time, twilight has long been popular with photographers and painters, who refer to it as the "blue hour", after the French [[expression]] l'heure bleue. Twilight is [[technically]] defined as the period before sunrise and after sunset during which there is [[natural]] [[light]] provided by the upper [[atmosphere]], which receives direct sunlight and scatters part of it towards the [[Earth]]'s [[surface]].

Twilight is [[sacred]] in [http://en.wikipedia.org/wiki/Hinduism Hinduism]. It is called गोधूळिवेळ in [http://en.wikipedia.org/wiki/Marathi_language Marathi] or गोधूलिवेला godhūlivelā in [http://en.wikipedia.org/wiki/Hindi_language Hindi] — [[literally]] "cow dust time". Many rituals including [http://en.wikipedia.org/wiki/Sandhyavandanam Sandhyavandanam] and [http://en.wikipedia.org/wiki/Puja_(Hinduism) Pooja] are [[performed]] at twilight. Hindus believe that this time is [[ideal]] for [[study]] and [[education]].[http://en.wikipedia.org/wiki/Twilight]

Twilight is [[sacred]] in [https://en.wikipedia.org/wiki/Hinduism Hinduism]. It is called गोधूळिवेळ in [https://en.wikipedia.org/wiki/Marathi_language Marathi] or गोधूलिवेला godhūlivelā in [https://en.wikipedia.org/wiki/Hindi_language Hindi] — [[literally]] "cow dust time". Many rituals including [https://en.wikipedia.org/wiki/Sandhyavandanam Sandhyavandanam] and [https://en.wikipedia.org/wiki/Puja_(Hinduism) Pooja] are [[performed]] at twilight. Hindus believe that this time is [[ideal]] for [[study]] and [[education]].[https://en.wikipedia.org/wiki/Twilight]

[[Category: Earth Science]]

[[Category: Earth Science]]