daytime

This hashtag in Italian

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On Earth, daytime is the period of the day during which a given location experiences natural illumination from direct sunlight. Daytime occurs when the Sun appears above the local horizon, that is, anywhere on the globe's hemisphere facing the Sun. In direct sunlight the movement of the sun can be recorded and observed using a sundial that casts a shadow that slowly moves during the day. Other planets and natural satellites that rotate relative to a luminous primary body, such as a local star, also experience daytime, but this article primarily discusses daytime on Earth.

Approximately half of the Earth is illuminated at any time by the Sun. The area subjected to direct illumination is almost exactly half the planet; but because of atmospheric and other effects that extend the reach of indirect illumination, the area of the planet covered by either direct or indirect illumination amounts to slightly more than half the surface.

The hemisphere of the Earth experiencing daytime at any given instant changes continuously as the planet rotates on its own axis. The axis of the Earth's rotation is not perpendicular to the plane of its orbit around the Sun (which is parallel with the direction of sunlight), and so the length of the daytime period varies from one point on the planet to another. Additionally, since the axis of rotation is relatively fixed in comparison to the stars, it moves with respect to the Sun as the planet orbits the star. This creates seasonal variations in the length of the daytime period at most points on the planet's surface.

The period of daytime from the standpoint of a surface observer is roughly defined as the period between sunrise, when the Earth's rotation towards the east first causes the Sun's disc to appear above the horizon, to sunset, when the continuing rotation of the Earth causes the Sun's disc to disappear below the horizon to the west. Because the Sun is a luminous disc as seen from the Earth, rather than a point source of light, sunrise and sunset are not instantaneous and the exact definition of both can vary with context. Additionally, the Earth's atmosphere further bends and diffuses light from the Sun and lengthens the period of sunrise and sunset. For a certain period after sunset and before sunrise, indirect light from the Sun lightens the sky on Earth; this period is often referred to as twilight. Certain groups, such as Earthly astronomers, do not consider daytime to be truly ended until the Sun's disc is actually well below the Earth's horizon, because of this indirect illumination.

Given that Earth's own axis of rotation is tilted 23.44° to the line perpendicular to its orbital plane, called the ecliptic, the length of daytime varies with the seasons on the planet's surface, depending on the observer's latitude. Areas tilted toward the Sun are experiencing summer. Their tilt toward the Sun leads to more than half of the day seeing daylight and warmer temperatures, due to the higher directness of solar rays, the longer period of daytime itself, and less absorption of sunlight in the atmosphere. While increased daylight can have some effect on the higher temperatures in the summer, most of temperature rise results from the directness of the Sun, not the increased daylight. The high angles (around the zenith) of the Sun causes the tropics to be warm, while low angles (barely above the horizon) causes the polar regions to be cold. The slight effect of daylight hours on average seasonal temperature can be seen with the poles and tropical regions. The poles are still cold during their respective summers, despite seeing 24 hours of daylight for six months, while the Equator remains warm throughout the year, with only 12 hours of daylight per day.

Although the daytime length at the Equator remains 12 hours in all seasons, the duration at all other latitudes varies with the seasons. During the winter, daytime lasts shorter than 12 hours; during the summer, it lasts longer than 12 hours. Northern winter and southern summer concur, while northern summer and southern winter concur.

At the Equator, the daytime period always lasts about 12 hours, regardless of season. As viewed from the Equator, the Sun always rises and sets vertically, following an apparent path nearly perpendicular to the horizon. Due to the axial tilt of Earth, Sun always lies within 23.44° north or south of the celestial equator, so the subsolar point always lies within the tropics.

From the March equinox to the September equinox, the Sun rises within 23.44° north of due east, and sets within 23.44° north of due west. From the September equinox to the March equinox, the Sun rises within 23.44° south of due east and sets within 23.44° south of due west. The Sun's path lies entirely in the northern half of the celestial sphere from the March equinox to the September equinox, but lies entirely in the southern half of the celestial sphere from the September equinox to the March equinox. On the equinoxes, the equatorial Sun culminates at the zenith, passing directly overhead at solar noon.

The fact that the equatorial Sun is always so close to the zenith at solar noon explains why the tropical zone contains the warmest regions on the planet overall. Additionally, the Equator sees the shortest sunrise or sunset because the Sun's path across the sky is so nearly perpendicular to the horizon. On the equinoxes, the solar disk takes only two minutes to traverse the horizon (from top to bottom at sunrise and from bottom to top at sunset).

The tropics occupy a zone of Earth's surface between 23.44° north and 23.44° south of the Equator. Within this zone, the Sun will pass almost directly overhead (or culminate) on at least one day per year. The line of 23.44° north latitude is called the Tropic of Cancer, because when it was named, the Sun passed overhead at this location at the time of year when it was near the constellation of Cancer. The equivalent line of south latitude is called the Tropic of Capricorn, for similar reasons. The sun enters and leaves each zodiacal constellation slightly later each year at the rate of about 1 day every 72 years. For more information, see precession of the equinoxes.

On the Tropical Circles, the Sun is directly overhead only once per year, on the corresponding solstice. At latitudes closer to the Equator and on the Equator itself, it will be overhead twice per year (on the equinoxes in the case of the Equator). Outside the tropics, the Sun never passes directly overhead.

Around the poles, which coincide with the rotational axis of Earth as it passes through the surface, the seasonal variations in the length of daytime are extreme. In fact, within 23.44° latitude of the poles, there will be at least some days each year during which the sun never goes below the horizon. There will also be days when the Sun never rises above the horizon. This number will be fewer, but close to the number of days in the summer where the sun doesn't set (for example the sunrise is usually a few days before the spring equinox and extends a few days past the fall equinox). This phenomenon of more daylight than night is not unique to the poles. In fact, at any given time slightly more than half of the earth is in daylight. The 24 hours of summer daylight is known as the midnight sun that is famous in some northern countries. To the north, the Arctic Circle marks this 23.44° boundary. To the south, the Antarctic Circle marks the boundary. These boundaries correspond to 66.56° north or south latitude, respectively. Because the sky is still bright and stars can't be seen when the sun is less than 6 degrees under the horizon, 24-hour nights with stars visible all the time only happen beyond 73° north or south latitude.

At and near the poles, the Sun never rises very high above the horizon, even in summer, which is one of reasons why these regions of the world are consistently cold in all seasons (others include the effect of albedo, the relative increased reflection of solar radiation of snow and ice). Even at the summer solstice, when the Sun reaches its highest point above the horizon at noon, it is still only 23.44° above the horizon at the poles. Additionally, as one approaches the poles the apparent path of the Sun through the sky each day diverges increasingly from the vertical. As summer approaches, the Sun rises and sets become more northerly in the north and more southerly in the south. At the poles, the path of the Sun is indeed a circle, which is roughly equidistant above the horizon for the entire duration of the daytime period on any given day. The circle gradually sinks below the horizon as winter approaches, and gradually rises above it as summer approaches. At the poles, apparent sunrise and sunset may last for several days.

At middle latitudes, far from both the Equator and the poles, variations in the length of daytime are moderate. In the higher middle latitudes where Montreal, Paris and Ushuaia are located, the difference in the length of the day from summer to winter can be very noticeable: the sky may still be lit at 10 pm in summer, but may be dark at 5 pm in winter. In the lower middle latitudes where southern California, Egypt and South Africa are located, the seasonal difference is smaller, but still results in approximately 4 hours difference in daylight between the winter and summer solstices. The difference becomes less pronounced the closer one gets to the equator.[citation needed] An approximation to the monthly change can be obtained from the rule of twelfths.

The exact instant of solar noon, when the Sun reaches its highest point in the sky, varies with the seasons. This variation is called the equation of time; the magnitude of variation is about 30 minutes over the course of a year.

Let's just start with the fact that my very first daytime scene was kissing a complete stranger/actress while sayin…
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Fox News transcripts referencing "debt" or "deficit" over the last month, via Nexis*: 38 Fox News transcripts refe…
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RT @SoapOperaNewss: #FinolaHughes joins ABC Daytime Broadway project! #GeneralHospital #GH
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RT @Markbolton7722: Gelato #33 is an evenly-balanced hybrid. Its sweet citrus taste is also fruity. Sunset Sherbet x Thin Mint Girl Scout C…
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Unfs. Glad today is last day will be working till 7 n back to regular unit tmrw n normal daytime hrs....
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@MirleniaBetanc3 @BiankitaCG Si tienes vpn italiana, está en la web de grandefratello , en daytime💔
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ho visto il daytime e dire che è stata una pugnalata al cuore è dire poco #tzvip
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@ZachMoss6 People have different internal clocks. Late-risers, early-risers, wake up in mid of night, daytime, afte…
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@FeralNegress Daytime bot here #AOCSmollett #AlexandraOcasioSmollet
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during the interview process. when i protested and asked to be given a daytime schedule, the HR rep told me "You ca…
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RT @laaaities: I don't even know why thieves attempt to pull of daytime heists in the north. People that side don't know how to mind their…
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Ragazze ma il daytime di Pier 😍😍stupendo!! Appena potete recuperatelo ha detto delle parole bellissime verso Giulia ❤❤❤#prelemi
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Idc ill tell her he wants bts young forever daytime special edition album
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RT @TinaMoorereport: You all should broaden horizons a bit:
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there gone in his per daytime to single other men ? 6 sites of rental porn. 1 rental equipment free porn.
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@martinpmurray I assume a 'chameleon bar' is one that can be used as a nightclub at night and a lounge/ bar daytime…
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@GFVIP_Official Daytime orribile. Perché far vedere il confessionale di Dayane? Vergognatevi per questa spettacolar…
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Manna Reign Chocolates, Gluten-Free treats
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Comunque va bene che il gioco continui, ci sta che se ne parli, ma almeno il daytime sulla giornata di ieri (incoe…
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CHE BELLA LA PARTE DEL DAYTIME DOVE CI SONO GIULIA E PIER 🥺#prelemi
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Four Men Steal $160,000 Worth Of Chanel Bags In Daytime Heist
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La perché la linea della vita nel daytime? #tzvip
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Piantino anche oggi per il daytime: fatto ✔️ #GFVIP
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RT @hisflannelcure: Cas had a "date" gone wrong and then Dean came to pick him up in the middle of the night and said "where to cas" and th…
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@yamxyammy 따따씨~!생일축하해요~!!쥬말인대 푻 ㅣ고ㅠ마싯는거ㅠ마니드시고 술은 조금만 먹기~!~!~케이크두 후하기야~!!저랑 ㅎㅁ해줘서 고마워요❤️❤️
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Il daytime mi ha devastata #rosmello
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Ma fanno sempre vedere la linea della vita nel daytime? #prelemi
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che horror anche questo daytime, con questa musica in sottofondo per spettacolizzare il tutto bleah pessimi #sovip #tzvip #gfvip
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RT @HOUSEDESlGN: Daytime Nighttime
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RAGA DAYTIME GIULIAAA LINEA DELLA VITA FORSE STASERA LA FANNO VEDERE #prelemi
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Ma perché la linea della vita di Giulia è nel daytime e quella degli altri no?#tzvip
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per tutto il daytime su dayane ho avuto i brividi sulla pelle e non scherzo
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Ma se la fanno vedere nel Daytime allora non vedremo in puntata la linea della vita di Giulia? #PRELEMI
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Birthday on Monday 🥴 so gonna ship the kids off tomorrow and celebrate then instead.. I’ve already got a daytime ba…
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Il daytime è stato da BRIVIDI non oso immaginare stasera con le clip #rosmello
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Mamma mia che daytime😭😭😭😭😭, che montaggio da morsa allo stomaco 😩 evento che mi ha colpito tanto, anche di più di f…
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Bring the little ones for a daytime swim on select Fridays from 10 am to 12 pm for a special $15.00 per person swim…
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Durante il daytime "non perdetevi la puntata di questa sera. Tante sorprese, incontri inaspettati e scelte difficili" Non ho più parole.
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il daytime straziante, mi ha ucciso la scena della vasca con rosa e la reazione all'aereo #rosmello
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Style Casual,Daytime Pattern Solid Detail Buttons down Sleeves Type Long sleeves Collar V neck Material Polyester,Cotton Season Fall,Winter Occasion Going out, Daily
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32 Beauty Products You Might Not Know You've Been Missing Out On To Try In 2021
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Sweater Dresses,Green,Brown,Red,Long Sleeve,A-line,Color-block,Paneled,Belts,Folds,Buttoned,Crew Neck,Spring/Fall,Mid-weight,Non-stretchy,Work,Daytime,Daily,Polyester,Elegant
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Free Shipping & Easy Return. Up to 30% Off. Wannabe Belted Houndstooth A-Line Skirt featured by thecharmingolive
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the perfect daytime outfit #fashion #streetstyle #styleinspiration #ootd #clothes #style #lookbook #wear #wardrobeclassics #summerstyle #summerfashion #styleideas #styleinspiration
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Style Casual,Daytime Pattern Solid Detail Paneled,Side pockets Collar Lapel Sleeves Type Short sleeves Length Midi Material Polyester Season Summer Occasion Going out,Daily life
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Kaufen Sie bei Stylewe das zweiteilige Set für Damen von Tiana. Online-Einkaufsstil ..., #bei #Damen #das #für #kaufen #OnlineEinkaufsstil #Set #Sie #Stylewe #Tiana #von #zweiteilige
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daytime Pinterest Ideas
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Jun 18, 2020 00:54
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•WORK IN PROGRESS...🎨🖌🦧🦧🦧 ___________________________________________ Det er såååå varmt her i Trondheim om dagene🌡🥵, at jeg må ty til sene kvelder og netter for i det hele tatt klare å male🥵🥱 På dagen tørker malingen tvært og jeg renner bort(ikke for det, det er mye igjen av meg enda da)!!🤭😅😅 Ønsker alle en riktig god kveld/ natt🌝🪐⭐🌠☮ _____________________________________________ #workinprogress #tohot to #paint in the #daytime #paintingatnight #art #mystyle #acrylicpainting
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#daytime #mystyle #workinprogress #art #paint
Jun 18, 2020 00:58
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Two of the gang are chillin' on the rooftops🤙🏼🌿 . . . #daytime #rooftops #soda #chips #spliff #passoutgang
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#spliff #passoutgang #chips #rooftops #daytime
Jun 18, 2020 01:02
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aerial view of city near river during daytime - #aerial #view #of #city #near #river #during #daytime
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#during #view #aerial #city
Jun 18, 2020 01:08
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photography of mountain range during daytime - #photography #of #mountain #range #during #daytime
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#during #daytime #mountain #range
Jun 18, 2020 01:08
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snow covered mountain during daytime - #snow #covered #mountain #during #daytime
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#daytime #during #covered #snow #mountain
Jun 18, 2020 01:09
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👁️👄👁️ Pill bug👁️👄👁️ They are so cute! #insects #insect #pillbug #pillbugs #pillbugsofinstagram #insectsofinstagram #insectphotography #insectagram #leaves #twigs #dirt #ground #pebbles #rocks #grass #green #yellow #brown #grey #gray #nature #naturephotography #outdoors #outside #freshair #bored #insectlovers #day #daytime #photography
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#naturephotography #outdoors #yellow #bored #outside
Jun 18, 2020 01:13
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Una vez podamos volver a viajar la Riviera Maya es una buena opción para visitar, kilómetros de playas caribeñas, algunas escondidas entre selva, otras mucho más conocidas, las cuales estoy seguro que te van a hacer súper feliz (si eres amante de la playa) 🥰🇲🇽 #sky #nature #sea #instagood #caribbean #ocean #photooftheday #vegetation #mexico #shore #daytime #coast #tree #light #horizon #cloud #sunlight #tropics #azure #rivieramaya #travelblogger #waterresources #turquoise #wave #vacation #palmtree #beach #calm #sun #windwave
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#cloud #instagood #travelblogger #daytime #coast
Jun 18, 2020 01:14
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brown grass near body of water during daytime - #brown #grass #near #body #of #water #during #daytime
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#grass #water #near #daytime
Jun 18, 2020 01:14
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Linha Classic || nova coleção: #daytime | Colar de pérolas super delicado e versátil, corre pra garantir o teu! Cada uma foi escolhida a dedo pra você! Lembrando que a coleção daytime é LIMITADA! Preço: Colar pérolas: 22,00 Brinco arqueado correntes: 22,00 #colar #amélie #acessorios #moda #livredegênero #dourado #gold #photoshoot
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#daytime #photoshoot #livredegênero #moda #acessorios