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'Dawn' Directed by Rose McGowan
Published: 2015/06/22
Channel: Rose McGowan
Dawn (Go Away) - Frankie Valli and the Four Seasons
Dawn (Go Away) - Frankie Valli and the Four Seasons
Published: 2010/08/06
Channel: wolverine9391
DAWN
DAWN
Published: 2017/12/31
Channel: RizonielTV
SAMAA TV LIVE STREAM | SAMAA TV | Samaa YouTube | Samaa News
SAMAA TV LIVE STREAM | SAMAA TV | Samaa YouTube | Samaa News
Published: 2017/12/15
Channel: SAMAA TV
Dawn | A Chill Gaming Music Mix | Best of EDM
Dawn | A Chill Gaming Music Mix | Best of EDM
Published: 2017/02/17
Channel: Vibes
ZAYN - Dusk Till Dawn ft. Sia
ZAYN - Dusk Till Dawn ft. Sia
Published: 2017/09/07
Channel: ZaynVEVO
DAWN - Blow
DAWN - Blow
Published: 2014/10/29
Channel: DawnRichardVEVO
'Dawn' An Ambient Mix
Published: 2013/01/01
Channel: MrSuicideSheep
【のびハザThe Dawn♯6】健治が聖奈にヘンタイ発言!小学生なのに○○だな…。のび太のバイオハザードThe Dawn
【のびハザThe Dawn♯6】健治が聖奈にヘンタイ発言!小学生なのに○○だな…。のび太のバイオハザードThe Dawn
Published: 2018/01/19
Channel: ぐっちの部屋(ミラクルぐっち)
Монстры из игр: Вендиго [Дожить до рассвета / Until dawn]
Монстры из игр: Вендиго [Дожить до рассвета / Until dawn]
Published: 2018/01/20
Channel: Valaybalalay
Nicky, Ricky, Dicky & Dawn Antes y Después 2017
Nicky, Ricky, Dicky & Dawn Antes y Después 2017
Published: 2017/01/08
Channel: Platinium
ドラえもん のび太のバイオハザード The Dawn #6【のびハザThe Dawn】
ドラえもん のび太のバイオハザード The Dawn #6【のびハザThe Dawn】
Published: 2018/01/20
Channel: アブ -abu-
Tony Orlando & Dawn~Knock Three Times - early rare music video
Tony Orlando & Dawn~Knock Three Times - early rare music video
Published: 2010/11/09
Channel: mezzomanUK
JAEGER - Until Dawn
JAEGER - Until Dawn
Published: 2016/01/14
Channel: Trap Nation
ドラえもん のび太のバイオハザード The Dawn #1【のびハザThe Dawn】
ドラえもん のび太のバイオハザード The Dawn #1【のびハザThe Dawn】
Published: 2018/01/15
Channel: アブ -abu-
Nicky, Ricky, Dicky & Dawn Before And After 2017
Nicky, Ricky, Dicky & Dawn Before And After 2017
Published: 2017/08/09
Channel: Platinium
ドラえもん のび太のバイオハザード The Dawn #3 【のびハザThe Dawn】
ドラえもん のび太のバイオハザード The Dawn #3 【のびハザThe Dawn】
Published: 2018/01/17
Channel: アブ -abu-
DAWN - Titans x James Dean
DAWN - Titans x James Dean
Published: 2015/05/27
Channel: DawnRichardVEVO
ドラえもん のび太のバイオハザード The Dawn #4 【のびハザThe Dawn】
ドラえもん のび太のバイオハザード The Dawn #4 【のびハザThe Dawn】
Published: 2018/01/18
Channel: アブ -abu-
【のびハザThe Dawn】のび太、死す!?謎の金髪イケメン登場!!のび太のバイオハザードThe Dawn♯2
【のびハザThe Dawn】のび太、死す!?謎の金髪イケメン登場!!のび太のバイオハザードThe Dawn♯2
Published: 2018/01/15
Channel: ぐっちの部屋(ミラクルぐっち)
Soundtrack - Pride and Prejudice - Dawn
Soundtrack - Pride and Prejudice - Dawn
Published: 2008/09/30
Channel: Gurkiball
The Thundermans & Nicky, Ricky, Dicky & Dawn NEW EPISODES! ft. Lizzy Greene | Nick
The Thundermans & Nicky, Ricky, Dicky & Dawn NEW EPISODES! ft. Lizzy Greene | Nick
Published: 2018/01/02
Channel: Nickelodeon
Brand NEW Episodes of Nicky, Ricky, Dicky & Dawn Coming in 2018‼️ | Nick
Brand NEW Episodes of Nicky, Ricky, Dicky & Dawn Coming in 2018‼️ | Nick
Published: 2017/12/31
Channel: Nickelodeon
ドラえもん のび太のバイオハザード The Dawn #2 【のびハザThe Dawn】
ドラえもん のび太のバイオハザード The Dawn #2 【のびハザThe Dawn】
Published: 2018/01/16
Channel: アブ -abu-
Trên tay Bitis Hunter X màu mới: MidNight Black, Red Dawn và Ash Grey
Trên tay Bitis Hunter X màu mới: MidNight Black, Red Dawn và Ash Grey
Published: 2018/01/17
Channel: Tinh tế
Nicky, Ricky, Dicky & Dawn Antes y Después 2017
Nicky, Ricky, Dicky & Dawn Antes y Después 2017
Published: 2017/01/27
Channel: Azuliso
Horizon Zero Dawn Innit
Horizon Zero Dawn Innit
Published: 2018/01/20
Channel: Fizhy
Kok Ada Hantu 👻  - Until Dawn - Indonesia Part 8
Kok Ada Hantu 👻 - Until Dawn - Indonesia Part 8
Published: 2018/01/15
Channel: MiawAug
Hidden Meaning in Dawn of the Planet of the Apes – Earthling Cinema
Hidden Meaning in Dawn of the Planet of the Apes – Earthling Cinema
Published: 2016/07/12
Channel: Wisecrack
CAGUEI DIARRÉIA | Until dawn #9
CAGUEI DIARRÉIA | Until dawn #9
Published: 2018/01/17
Channel: PupiGames
Dawn of Titans- The Forest Guardian Event- Grinding to Logu Stream
Dawn of Titans- The Forest Guardian Event- Grinding to Logu Stream
Published: 2018/01/21
Channel: ZALONisap
#2[のびハザ The Dawn ゆっくり実況] 止まれば即死!? [ドラえもん のび太のバイオハザードThe Dawn]
#2[のびハザ The Dawn ゆっくり実況] 止まれば即死!? [ドラえもん のび太のバイオハザードThe Dawn]
Published: 2018/01/21
Channel: ザンジ
R.K.M, Ken-Y - Down
R.K.M, Ken-Y - Down
Published: 2009/11/23
Channel: RKMAndKenYVEVO
#1[のびハザ The Dawn ゆっくり実況] 現実?それとも夢オチ!? [ドラえもん のび太のバイオハザード The Dawn]
#1[のびハザ The Dawn ゆっくり実況] 現実?それとも夢オチ!? [ドラえもん のび太のバイオハザード The Dawn]
Published: 2018/01/18
Channel: ザンジ
Bad Decisions... 💀 UNTIL DAWN - Part 1
Bad Decisions... 💀 UNTIL DAWN - Part 1
Published: 2018/01/17
Channel: Chaos
ZAYN - Dusk Till Dawn (Lyrics) ft. Sia
ZAYN - Dusk Till Dawn (Lyrics) ft. Sia
Published: 2017/09/07
Channel: Jessie's Lounge
Kutembea Nawe - Rebekah Dawn (OFFICIAL MUSIC VIDEO)
Kutembea Nawe - Rebekah Dawn (OFFICIAL MUSIC VIDEO)
Published: 2016/09/28
Channel: Rebekah Dawn
Dawn - Slaughtersun (Crown of the Triarchy) (Full Album) (HQ)
Dawn - Slaughtersun (Crown of the Triarchy) (Full Album) (HQ)
Published: 2015/11/22
Channel: Dark Krishna
Dawn Official Teaser Trailer 1 (2015) - Rose McGowan Movie HD
Dawn Official Teaser Trailer 1 (2015) - Rose McGowan Movie HD
Published: 2015/06/11
Channel: Movieclips Film Festivals & Indie Films
celtic woman The Sky and the Dawn and the Sun Lyrics
celtic woman The Sky and the Dawn and the Sun Lyrics
Published: 2010/11/23
Channel: Kelley Lynn
ZAYN - Dusk Till Dawn ft. Sia (Boyband Cover)
ZAYN - Dusk Till Dawn ft. Sia (Boyband Cover)
Published: 2017/09/26
Channel: RoadTrip TV
1. Dawn Pride and Prejudice Score 2005
1. Dawn Pride and Prejudice Score 2005
Published: 2010/10/23
Channel: iLoveMovieScores
UNTIL DAWN
UNTIL DAWN
Published: 2017/07/16
Channel: loltyler1
Dreamtale - The Dawn
Dreamtale - The Dawn
Published: 2009/03/28
Channel: Greenpakto
ZAYN - Dusk Till Dawn ft. Sia (SING OFF vs. Madison Beer)
ZAYN - Dusk Till Dawn ft. Sia (SING OFF vs. Madison Beer)
Published: 2017/09/25
Channel: Conor Maynard
Dusk Till Dawn (Radio Edit)
Dusk Till Dawn (Radio Edit)
Published: 2017/09/07
Channel: Zayn Malik - Topic
'Dawn' Pt. 3 (An Ambient Mix)
Published: 2016/01/01
Channel: MrSuicideSheep
Dawn, unang sumabak sa maze challenge ni Kuya
Dawn, unang sumabak sa maze challenge ni Kuya
Published: 2015/10/23
Channel: ABS-CBN Entertainment
Spy
Spy's Casual Couch: Horizon Zero Dawn [Part 17]
Published: 2018/01/20
Channel: A German Spy
12yr old ventriloquist takes control of little Dawn | Little Big Shots
12yr old ventriloquist takes control of little Dawn | Little Big Shots
Published: 2017/05/03
Channel: Little Big Shots UK
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WIKIPEDIA ARTICLE

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Late summer dawn over the Mojave desert, California
Dawn is sometimes considered the beginning of morning twilight (as depicted here), sometimes the period of twilight, and sometimes the time of sunrise.
Skyline of Prague at dawn

Dawn, from an Old English verb dagian: "to become day", is the time that marks the beginning of twilight before sunrise. It is recognized by the appearance of indirect sunlight being scattered in the atmosphere, when the centre of the Sun's disc reaches 18° below the horizon.[1] This dawn twilight period will last until sunrise (when the Sun's upper limb breaks the horizon), as the diffused light becomes direct sunlight.

Civil, nautical, and astronomical dawn, when defined as the beginning time of the corresponding twilight[2]

Types of dawn[edit]

Dawn begins with the first sight of lightness in the morning, and continues until the sun breaks the horizon. This morning twilight before sunrise, is divided into three categories depending on the amount of sunlight that is present in the sky, which is determined by the angular distance of the centre of the Sun (degrees below the horizon) in the morning. The categories are named: astronomical, nautical, and civil dawn.

Astronomical dawn[edit]

Astronomical twilight begins when the sky is no longer completely dark after astronomical dawn. This occurs when the Sun is 18 degrees below the horizon in the morning.[3] At this point a very small portion of the sun's rays illuminate the sky and the fainter stars begin to disappear. Astronomical dawn is often indistinguishable from night, especially in areas with light pollution. Astronomical dawn marks the beginning of astronomical twilight, which lasts until nautical dawn.[4]

Nautical dawn[edit]

Nautical twilight begins when there is enough illumination for sailors to distinguish the horizon at sea but the sky is too dark to perform outdoor activities (except with artificial light). Formally, nautical twilight begins when the Sun is 12 degrees below the horizon in the morning. The sky becomes light enough to clearly distinguish it from land and water. Nautical dawn marks the start of nautical twilight, which lasts until civil dawn.[4][3]

Civil dawn[edit]

Beginning of morning civil twilight in southern California, United States

Civil twilight begins when there is enough light for most objects to be distinguishable, so that some outdoor activities, but not all, can commence. Formally, civil dawn occurs when the Sun is 6 degrees below the horizon in the morning.[3]

If the sky is clear, it is blue colored, and if there is some cloud or haze, there can be bronze, orange and yellow colours. Some bright stars and planets such as Venus and Jupiter are visible to the naked eye at civil dawn. This moment marks the start of civil twilight, which lasts until sunrise.[4]

Effects of latitude[edit]

The duration of the twilight period between first light and sunrise varies greatly depending on the observer's latitude, from a little over twenty minutes in equatorial regions, to many hours in polar regions, to several weeks at the poles.

Equator[edit]

All phases of dawn and dusk are shortest at the equator, where the Sun at equinox rises and sets at a right angle to the horizon; the steps between civil, nautical, and astronomical dawn or dusk, correspond to only 24 minutes each. At all places on the earth, dawn and dusk times are fastest around the equinoxes and slowest at the summer and winter solstices.

Polar regions[edit]

As the calendar approaches the summer or winter solstice, the days or nights, respectively, get longer, which can have a potential impact on the time and duration of dawn and dusk. This effect is more pronounced closer to the poles, where the Sun rises at the spring equinox and sets at the autumn equinox, with a long period of dawn/dusk, lasting for a few weeks.

The polar circle (at 66°34′ N or S) is defined as the lowest latitude at which the Sun does not set at the summer solstice. Therefore, the angular radius of the polar circle is equal to the angle between the plane of Earth's equator and that of the ecliptic. This period of time with no sunset lengthens closer to the pole.

Near the summer solstice, latitudes higher than 54°34′ get no darker than nautical dawn/dusk; the "darkness of the night" varies greatly in these latitudes.

At latitudes higher than about 60°34, summer nights get no darker than civil dusk or dawn. This period of "bright nights" is longer at higher latitudes.

Example[edit]

Around the summer solstice, Glasgow, Scotland at 55°51′ N, and Copenhagen, Denmark at 55°40′ N, get a few hours of "night feeling". Oslo, Norway at 59°56′ N, and Stockholm, Sweden at 59°19′ N, seem very bright when the Sun is below the horizon. When the sun gets 9.0 to 9.5 degrees below the horizon (at summer solstice this is at latitudes 57°30′–57°00′), the zenith gets dark even on cloud-free nights (if there is no full moon), and even the brightest stars are clearly visible in a large majority of the sky.

Mythology and religion[edit]

Many Indo-European mythologies have a dawn goddess, separate from the male Solar deity, her name deriving from PIE *h2ausos-, derivations of which include Greek Eos, Roman Aurora and Indian Ushas. Also related is Lithuanian Aušrinė, and possibly a Germanic *Austrōn- (whence the term Easter). In Sioux mythology, Anpao is an entity with two faces.

The Hindu dawn deity Ushas is female, whereas Surya, the Sun, and Aruṇa, the Sun's charioteer, are male. Ushas is one of the most prominent Rigvedic deities. The time of dawn is also referred to as the Brahmamuhurtham (Brahma is god of creation and muhurtham is a Hindu unit of time), and is considered an ideal time to perform spiritual activities, including meditation and yoga. In some parts of India, both Usha and Pratyusha (dusk) are worshiped along with the Sun during the festival of Chhath.

Prime is the fixed time of prayer of the traditional Divine Office (Canonical Hours) in Christian liturgy, said at the first hour of daylight.

In Islam, astronomical dawn (Arabic fajr) is the time of the first prayer of the day, and the beginning of the daily fast during Ramadan.

In Judaism, the question of how to calculate dawn (Hebrew Alos/Alot HaShachar, or Alos/Alot) is posed by the Talmud,[6] as it has many ramifications for Jewish law (such as the possible start time for certain daytime commandments, like prayer). The simple reading of the Talmud is that dawn takes place 72 minutes before sunrise. Others, including the Vilna Gaon, have the understanding that the Talmud's timeframe for dawn was referring specifically to an equinox day in Mesopotamia, and is therefore teaching that dawn should be calculated daily as commencing when the sun is 16.1 degrees below the horizon. The longstanding practice among most Sephardic Jews is to follow the first opinion, while many Ashkenazi Jews follow the latter view.

Dawn in art[edit]

Literature[edit]

  • Homer uses the stock epithet "rosy-fingered Dawn" frequently in The Iliad and The Odyssey.
  • An aubade (Occitan Alba, German Tagelied) is a song about lovers having to separate at daybreak.
  • Aurora Musis amica (Dawn is a friend to the Muse), in Epigrammata Disticha Poetarum Latinorum, Veterum Et Recentum, Nobiliora (1642) by Barthold Nihus[7]

See also[edit]

References[edit]

  1. ^ "The different types of twilight". 
  2. ^ Van Flandern, T.; K. Pulkkinen (1980). "Low precision formulae for planetary positions". Astrophysical Journal Supplement Series. 31 (3): 391. Bibcode:1979ApJS...41..391V. doi:10.1086/190623. 
  3. ^ a b c National Oceanic and Atmospheric Administration. "Astronomical Terms". 
  4. ^ a b c https://www.timeanddate.com/astronomy/dawn.html
  5. ^ "New Dawn at La Silla". ESO Picture of the Week. European Southern Observatory. Retrieved 27 February 2015. 
  6. ^ Pesachim 94a
  7. ^ Nihus, Barthold (1642). Epigrammata disticha. Johannes Kinckius. 

External links[edit]

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