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	<title>Magnetosfera &#8211; PekDar &#8211; Inżynieria Astrofotografii</title>
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	<title>Magnetosfera &#8211; PekDar &#8211; Inżynieria Astrofotografii</title>
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		<title>Zorza Polarna (Aurora Borealis): Fizyka wiatru słonecznego nad Islandią</title>
		<link>https://astrophotography.pekdar.net/zorza-polarna-islandia-fizyka-fotografia/</link>
		
		<dc:creator><![CDATA[PekDar]]></dc:creator>
		<pubDate>Sat, 29 Aug 2020 18:29:45 +0000</pubDate>
				<category><![CDATA[Astrofotografia]]></category>
		<category><![CDATA[Astroturystyka]]></category>
		<category><![CDATA[Fotografia nocna]]></category>
		<category><![CDATA[Hellissandur]]></category>
		<category><![CDATA[Islandia]]></category>
		<category><![CDATA[Magnetosfera]]></category>
		<category><![CDATA[Wiatr słoneczny]]></category>
		<category><![CDATA[zorza polarna]]></category>
		<guid isPermaLink="false">https://astrophotography.pekdar.net/?p=3749</guid>

					<description><![CDATA[Zorza Polarna - Kompletny przewodnik po zjawisku Zorzy Polarnej. Analiza fizyczna powstawania barw w atmosferze, wpływ wiatru słonecznego oraz galeria zdjęć z Islandii dokumentująca różne formy zjawiska.]]></description>
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<h1>Zorza Polarna &#8211; Poligon magnetyczny</h1>
<p data-path-to-node="19">Zorza polarna to nie tylko spektakl wizualny, ale przede wszystkim wizualizacja pola magnetycznego Ziemi chroniącego nas przed kosmosem. Zdjęcia prezentowane w tym artykule zostały wykonane podczas wypraw na Islandię (m.in. w rejonie Hellissandur), która dzięki swojemu położeniu na 64-66° szerokości geograficznej północnej, znajduje się bezpośrednio pod &#8222;owalem zorzowym&#8221;.</p>
<p data-path-to-node="20"><b>Mechanizm Powstawania: Generator Energii</b> To, co widzimy jako tańczące światła, to efekt kolizji.</p>
<ol start="1" data-path-to-node="21">
<li>
<p data-path-to-node="21,0,0"><b>Wiatr słoneczny:</b> Słońce wyrzuca strumień naładowanych cząstek (protonów i elektronów).</p>
</li>
<li>
<p data-path-to-node="21,1,0"><b>Magnetosfera:</b> Pole magnetyczne Ziemi przechwytuje te cząstki i kieruje je w stronę biegunów.</p>
</li>
<li>
<p data-path-to-node="21,2,0"><b>Wzbudzenie:</b> Gdy cząstki te uderzają w góry, jonosfery, przekazują energię atomom atmosfery. Atomy te, wracając do stanu podstawowego, emitują foton – światło.</p>
</li>
</ol>
<figure id="attachment_3754" aria-describedby="caption-attachment-3754" style="width: 2560px" class="wp-caption aligncenter"><img fetchpriority="high" decoding="async" class="size-full wp-image-3754" src="https://astrophotography.pekdar.net/wp-content/uploads/2020/08/IMG_2281.jpg" alt="Zorza Polarna" width="2560" height="1708" srcset="https://astrophotography.pekdar.net/wp-content/uploads/2020/08/IMG_2281.jpg 2560w, https://astrophotography.pekdar.net/wp-content/uploads/2020/08/IMG_2281-300x200.jpg 300w, https://astrophotography.pekdar.net/wp-content/uploads/2020/08/IMG_2281-2048x1367.jpg 2048w, https://astrophotography.pekdar.net/wp-content/uploads/2020/08/IMG_2281-150x100.jpg 150w, https://astrophotography.pekdar.net/wp-content/uploads/2020/08/IMG_2281-768x512.jpg 768w, https://astrophotography.pekdar.net/wp-content/uploads/2020/08/IMG_2281-1536x1025.jpg 1536w" sizes="(max-width: 2560px) 100vw, 2560px" /><figcaption id="caption-attachment-3754" class="wp-caption-text"><span style="color: #ffff00;">Zorza Polarna &#8211; Islandia<br /></span></figcaption></figure>
<h3>Spektroskopia Nieba</h3>
<p data-path-to-node="22"><b>Dlaczego różne kolory?</b> Na moich zdjęciach można dostrzec nie tylko dominującą zieleń, ale także fiolety i czerwienie. Kolor zależy od dwóch czynników: rodzaju gazu i wysokości zderzenia.</p>
<ul data-path-to-node="23">
<li>
<p data-path-to-node="23,0,0"><b>Zielony (<span class="math-inline" data-math="557.7 \text{ nm}"><span class="katex"><span class="katex-html" aria-hidden="true"><span class="base"><span class="mord">557.7</span><span class="mord text"><span class="mord"> nm</span></span></span></span></span></span>):</b> Najczęstszy widok. Powstaje w wyniku zderzeń z atomami <b>tlenu</b> na wysokości ok. 100-150 km. Ludzkie oko jest najbardziej czułe na to pasmo.</p>
</li>
<li>
<p data-path-to-node="23,1,0"><b>Czerwony (<span class="math-inline" data-math="630.0 \text{ nm}"><span class="katex"><span class="katex-html" aria-hidden="true"><span class="base"><span class="mord">630.0</span><span class="mord text"><span class="mord"> nm</span></span></span></span></span></span>):</b> Rzadszy, widoczny przy silnych burzach geomagnetycznych. To również tlen, ale na bardzo dużych wysokościach (&gt;200 km).</p>
</li>
<li>
<p data-path-to-node="23,2,0"><b>Fioletowy/Niebieski (<span class="math-inline" data-math="427.8 \text{ nm}"><span class="katex"><span class="katex-html" aria-hidden="true"><span class="base"><span class="mord">427.8</span><span class="mord text"><span class="mord"> nm</span></span></span></span></span></span>):</b> Powstaje z jonizacji cząsteczek <b>azotu (<span class="math-inline" data-math="N_2"><span class="katex"><span class="katex-html" aria-hidden="true"><span class="base"><span class="mord"><span class="mord mathnormal">N</span><span class="msupsub"><span class="vlist-t vlist-t2"><span class="vlist-r"><span class="vlist"><span class=""><span class="sizing reset-size6 size3 mtight"><span class="mord mtight">2</span></span></span></span><span class="vlist-s">​</span></span></span></span></span></span></span></span></span>)</b>. Widać go zazwyczaj w dolnych partiach &#8222;kurtyny&#8221; zorzy, poniżej 100 km, gdzie atmosfera jest gęstsza.</p>
</li>
</ul>
<p style="text-align: center;"> <div id="wppa-container-wrapper-1" class="aligncenter wppa-container-wrapper " style="width:100%;clear:both;display:block;margin-left:auto;margin-right:auto;padding:0;position:relative;"><div id="wppa-container-1" style="width:100%;" class="wppa-container aligncenter wp-caption"><div style="font-size:0;line-height:0"><a data-id="BHLELHEHgogB" href="https://astrophotography.pekdar.net/wp-content/uploads/wppa-source/album-1/AuroraBorealis–Hellissandur-Island-Zdjecie_nr_10.jpg?ver=3" data-lbtitle="Aurora Borealis – Hellissandur, Island - Photo nr 10&lt;br&gt; Aurora Borealis – Hellissandur, Island - © 2019 Dariusz Krzempek " data-rel="wppa" target="_self" class="thumb-img" id="a-237-1" data-alt="Aurora Borealis – Hellissandur, Island - Photo nr 10" style="cursor:wait;" onclick="return false;"><img decoding="async" id="ph-237-1" style="width:100%;margin:0;height:auto;padding:0;border:none;" width="3597" height="2400" src="https://astrophotography.pekdar.net/wp-content/uploads/wppa/thumbs/237.jpg?ver=85" alt="Aurora Borealis – Hellissandur, Island - Photo nr 10" class="size-medium wppa-sphoto"></a></div><div class="wp-caption-text"></div><svg id="wppa-ajax-spin-1" class="wppa-ajax-spin uil-default" width="120px" height="120px" viewBox="0 0 100 100" preserveAspectRatio="xMidYMid" stroke="" style="width:120px; 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<h3>Aspekt Fotograficzny</h3>
<p data-path-to-node="24"><b>Zamrażanie Struktury</b> Fotografowanie zorzy to balansowanie między ekspozycją a ruchem. Zorza jest obiektem dynamicznym.</p>
<ul data-path-to-node="25">
<li>
<p data-path-to-node="25,0,0"><b>Czas naświetlania:</b> Zbyt długi (powyżej 15-20s) rozmyje strukturę &#8222;filarów&#8221;, zamieniając je w bezkształtną plamę. Aby uchwycić detale kurtyn widoczne na zdjęciach, stosowałem czasy rzędu 5-10 sekund przy wysokim ISO.</p>
</li>
<li>
<p data-path-to-node="25,1,0"><b>Wskaźnik Bz:</b> Dla fotografa-łowcy, ważniejszy od indeksu Kp jest parametr Bz (kierunek pola magnetycznego wiatru słonecznego). Tylko ujemna (południowa) wartość Bz gwarantuje spektakularny pokaz.</p>
</li>
</ul>
<p style="text-align: center;"> <div id="wppa-container-wrapper-2" class="aligncenter wppa-container-wrapper " style="width:100%;clear:both;display:block;margin-left:auto;margin-right:auto;padding:0;position:relative;"><div id="wppa-container-2" style="width:100%;" class="wppa-container aligncenter wp-caption"><div style="font-size:0;line-height:0"><a data-id="A44AfwAPxA4s" href="https://astrophotography.pekdar.net/wp-content/uploads/wppa-source/album-1/AuroraBorealis–Hellissandur-Island-Zdjecie_nr_1.jpg?ver=3" data-lbtitle="Aurora Borealis – Hellissandur, Island - Photo nr 1&lt;br&gt; Island, 9.2019 © 2019 Dariusz Krzempek Obróbka / Processing: GIMP 2.6 " data-rel="wppa" target="_self" class="thumb-img" id="a-228-2" data-alt="Aurora Borealis – Hellissandur, Island - Photo nr 1" style="cursor:wait;" onclick="return false;"><img decoding="async" id="ph-228-2" style="width:100%;margin:0;height:auto;padding:0;border:none;" width="3597" height="2400" src="https://astrophotography.pekdar.net/wp-content/uploads/wppa/thumbs/228.jpg?ver=85" alt="Aurora Borealis – Hellissandur, Island - Photo nr 1" class="size-medium wppa-sphoto"></a></div><div class="wp-caption-text"></div><svg id="wppa-ajax-spin-2" class="wppa-ajax-spin uil-default" width="120px" height="120px" viewBox="0 0 100 100" preserveAspectRatio="xMidYMid" stroke="" style="width:120px; 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<p style="text-align: center;">Miejscowość: <span style="color: #ffff00;"><strong>Hellissandur</strong></span></p>
<h3 data-path-to-node="26">Galeria: Światła Północy</h3>
<p data-path-to-node="26">Poniżej znajduje się kompletny zbiór fotografii dokumentujący różne formy i barwy zorzy polarnej zarejestrowanej nad islandzkim krajobrazem.</p>
<p>Więcej szczegółów o samym zjawisku: <a href="https://pl.wikipedia.org/wiki/Zorza_polarna" target="_blank" rel="noopener">https://pl.wikipedia.org/wiki/Zorza_polarna</a></p>
<p></p>
<p></p>
<p><strong>Parametry zdjęć:</strong></p>
<p></p>
<ul class="wp-block-list">
<li>ISO 1600</li>
<li>Light: 10 [s] – 15 [s]</li>
<li>Obróbka: RawTherapee oraz Gimp</li>
</ul>
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					<h3 class="elementor-heading-title elementor-size-default">Zorza w ruchu: Taniec magnetyczny (Wideo Time-Lapse)</h3>				</div>
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									<p data-path-to-node="10">Podczas gdy statyczna fotografia pozwala dostrzec detal i strukturę &#8222;filarów&#8221;, dopiero technika filmowa (time-lapse) oddaje prawdziwą naturę zjawiska – jego nieprzewidywalną dynamikę. Poniższy materiał wideo został zrealizowany metodą poklatkową. Aparat wykonywał zdjęcie co kilka sekund, które następnie zostały połączone w płynny film.</p>
<ul data-path-to-node="11">
<li>
<p data-path-to-node="11,0,0"><b>Co obserwować:</b> Zwróć uwagę na &#8222;falowanie&#8221; dolnej krawędzi kurtyny oraz gwałtowne rozbłyski (tzw. <i>substorms</i>), które potrafią zmienić jasność całego nieba w ciągu zaledwie kilku minut. To dowód na to, jak zmienny jest strumień wiatru słonecznego uderzającego w ziemską magnetosferę.</p>
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<p>Wideo z dźwiękiem. <strong>Oglądaj głośno</strong>.</p>								</div>
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