Dawn or civil dawn is the time at which the sun is 6 degrees below the horizon in the morning. Civil dawn is defined as that time at which there is enough light for objects to be distinguishable and that outdoor activities can commence.

Nautical dawn is the time at which the sun is 12 degrees below the horizon in the morning. Nautical dawn is defined as that time at which there is just enough sunlight for objects to be distinguishable.

Astronomical dawn is the time at which the sun is 18 degrees below the horizon in the morning. Astronomical dawn is that point in time at which the sun starts lightening the sky. Prior to this time, the sky is completely dark.

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Dawn - Twitter Search

@DawnnieMonique well I'm actually the OLDEST dawn!! Lmao I can do that! But I really didn't like her when they was in HS.. She OLD NEWS! Ugh
SabriaMichele (Bri) Thu, 05 Nov 2009 20:21:23 -0000
@DawnnieMonique well I'm actually the OLDEST dawn!! Lmao I can do that! But I really didn't like her when they was in HS.. She OLD NEWS! Ugh
RT @LuciaEsLucia: GARCIA AND DAWN won the coveted DJ HERO from @originalping ! Congrats twitteroonies. <- yeaaaa! Thanks!
DAWNdada (♫ DAWNdada.com) Thu, 05 Nov 2009 20:21:17 -0000
RT @LuciaEsLucia: GARCIA AND DAWN won the coveted DJ HERO from @originalping ! Congrats twitteroonies. <- yeaaaa! Thanks!
Dawn \,,/. http://ff.im/-b2E1R
oneidafish (oneidafish) Thu, 05 Nov 2009 20:20:29 -0000
Dawn \,,/. http://ff.im/-b2E1R
just voted "Idk " on "Should bella keep her baby in the book breaking dawn? " vote too ➔ http://bit.ly/8gbxM
hollz1996 (Holly Haigh-McShane) Thu, 05 Nov 2009 20:20:09 -0000
just voted "Idk " on "Should bella keep her baby in the book breaking dawn? " vote too ➔ http://bit.ly/8gbxM
ThA- @dawnlangstroth ... And video of Dawn's squeaky shoes & Mikey taking that WALK ! LOL! Love it! http://twitvid.com/D7D82
marcelle_hi (Marcelle) Thu, 05 Nov 2009 20:20:05 -0000
ThA- @dawnlangstroth ... And video of Dawn's squeaky shoes & Mikey taking that WALK ! LOL! Love it! http://twitvid.com/D7D82
@rachyfication That sucks that you are missing the bonfire in London and about breaking dawn, just hope you get snow in Paris :)
Nathan19871 (Nathan Harris) Thu, 05 Nov 2009 20:19:38 -0000
@rachyfication That sucks that you are missing the bonfire in London and about breaking dawn, just hope you get snow in Paris :)

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