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<p>Um muito obrigado pela detalhada informação.</p>
<p>Votos de bom natal para todos os leitores, familiares e amigos. e em especial para o caríssimo <span style="font-family: "Comic Sans MS", fantasy, cursive, "Apple Color Emoji", "Segoe UI Emoji", NotoColorEmoji, "Segoe UI Symbol", "Android Emoji", EmojiSymbols; font-size: 16px;">JOÃO
COSTA que que nos mantém sempre a par da melhor informação, BEM HAJA e um muito obrigado pelo excelente trabalho no <span style="color: rgb(51, 51, 51); font-size: 21px;">ARLA/CLUSTER.</span></span></p>
<p><span style="font-family: "Comic Sans MS", fantasy, cursive, "Apple Color Emoji", "Segoe UI Emoji", NotoColorEmoji, "Segoe UI Symbol", "Android Emoji", EmojiSymbols; font-size: 16px;"><span style="color: rgb(51, 51, 51); font-size: 12pt;">Carlos Barbosa</span></span></p>
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<div id="divRplyFwdMsg" dir="ltr"><font face="Calibri, sans-serif" style="font-size:11pt" color="#000000"><b>De:</b> cluster-bounces@radio-amador.net <cluster-bounces@radio-amador.net> em nome de João Costa > CT1FBF <ct1fbf@gmail.com><br>
<b>Enviado:</b> 20 de dezembro de 2016 23:32:54<br>
<b>Para:</b> Cluster-ARLA<br>
<b>Cc:</b> radioamadores_algarve@yahoogrupos.com.br; ct-comunicacoes-e-tecnologias@googlegroups.com<br>
<b>Assunto:</b> ARLA/CLUSTER: Este ano o Solstício de Inverno ocorre no dia 21 de Dezembro às 10h 44min.</font>
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Este instante marca o início do Inverno no Hemisfério Norte, estação mais fria do ano. Neste dia, o sol no plano da eclíptica passará pela declinação mínima (latitude ao equador) de -23° 26′ 4″, atingindo o máximo de fluxo de energia solar (J/m<sup style="margin:0px;padding:0px;border:0px;outline:0px;font-size:0.7em;background-color:transparent;background-position:initial initial;background-repeat:initial initial">2</sup>)
no hemisfério sul do planeta.</p>
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Produz também um dos dias mais curtos do ano no hemisfério norte: apenas 9<sup style="margin:0px;padding:0px;border:0px;outline:0px;font-size:0.7em;background-color:transparent;background-position:initial initial;background-repeat:initial initial">h</sup> e
27<sup style="margin:0px;padding:0px;border:0px;outline:0px;font-size:0.7em;background-color:transparent;background-position:initial initial;background-repeat:initial initial">min</sup> 4<sup style="margin:0px;padding:0px;border:0px;outline:0px;font-size:0.7em;background-color:transparent;background-position:initial initial;background-repeat:initial initial">s</sup> em
Lisboa. O dia 21 é igualmente curto até à casa dos segundos. A duração do dia será de: 9<sup style="margin:0px;padding:0px;border:0px;outline:0px;font-size:0.7em;background-color:transparent;background-position:initial initial;background-repeat:initial initial">h</sup> e
8<sup style="margin:0px;padding:0px;border:0px;outline:0px;font-size:0.7em;background-color:transparent;background-position:initial initial;background-repeat:initial initial">min</sup>em Bragança; 9<sup style="margin:0px;padding:0px;border:0px;outline:0px;font-size:0.7em;background-color:transparent;background-position:initial initial;background-repeat:initial initial">h</sup> e 12<sup style="margin:0px;padding:0px;border:0px;outline:0px;font-size:0.7em;background-color:transparent;background-position:initial initial;background-repeat:initial initial">min </sup>no
Porto; 9<sup style="margin:0px;padding:0px;border:0px;outline:0px;font-size:0.7em;background-color:transparent;background-position:initial initial;background-repeat:initial initial">h</sup> e 18<sup style="margin:0px;padding:0px;border:0px;outline:0px;font-size:0.7em;background-color:transparent;background-position:initial initial;background-repeat:initial initial">min</sup> em
Coimbra; 9<sup style="margin:0px;padding:0px;border:0px;outline:0px;font-size:0.7em;background-color:transparent;background-position:initial initial;background-repeat:initial initial">h</sup> e 21<sup style="margin:0px;padding:0px;border:0px;outline:0px;font-size:0.7em;background-color:transparent;background-position:initial initial;background-repeat:initial initial">min </sup>em Castelo
Branco; 9<sup style="margin:0px;padding:0px;border:0px;outline:0px;font-size:0.7em;background-color:transparent;background-position:initial initial;background-repeat:initial initial">h</sup> e 29<sup style="margin:0px;padding:0px;border:0px;outline:0px;font-size:0.7em;background-color:transparent;background-position:initial initial;background-repeat:initial initial">min </sup>em
Évora; 9<sup style="margin:0px;padding:0px;border:0px;outline:0px;font-size:0.7em;background-color:transparent;background-position:initial initial;background-repeat:initial initial">h</sup> e 33<sup style="margin:0px;padding:0px;border:0px;outline:0px;font-size:0.7em;background-color:transparent;background-position:initial initial;background-repeat:initial initial">min </sup>em
Ponta Delgada; 9<sup style="margin:0px;padding:0px;border:0px;outline:0px;font-size:0.7em;background-color:transparent;background-position:initial initial;background-repeat:initial initial">h</sup> e 37<sup style="margin:0px;padding:0px;border:0px;outline:0px;font-size:0.7em;background-color:transparent;background-position:initial initial;background-repeat:initial initial">min </sup>em
Faro; 10<sup style="margin:0px;padding:0px;border:0px;outline:0px;font-size:0.7em;background-color:transparent;background-position:initial initial;background-repeat:initial initial">h</sup> e 0<sup style="margin:0px;padding:0px;border:0px;outline:0px;font-size:0.7em;background-color:transparent;background-position:initial initial;background-repeat:initial initial">min </sup>no
Funchal;</p>
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Esta estação prolonga-se por 88,99 dias até ao próximo Equinócio que ocorre no dia 20 de Março de 2017 às 10<sup style="margin:0px;padding:0px;border:0px;outline:0px;font-size:0.7em;background-color:transparent;background-position:initial initial;background-repeat:initial initial">h</sup> 29<sup style="margin:0px;padding:0px;border:0px;outline:0px;font-size:0.7em;background-color:transparent;background-position:initial initial;background-repeat:initial initial">min</sup>.</p>
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Solstícios: pontos da eclíptica em que o Sol atinge as posições máxima e mínima de afastamento (altura) em relação ao equador, isto é, pontos em que a declinação do Sol atinge extremos: máxima no solstício de Verão e mínima no solstício de Inverno.</p>
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A palavra de origem latina (Solstitium) está associada à ideia de que o Sol devia estar estacionário, no movimento de afastamento ao equador, ao atingir a sua mais alta ou mais baixa posição no céu.</p>
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Fonte: Observatório Astronomico de Lisboa</p>
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