{"id":2284,"date":"2021-01-07T17:54:40","date_gmt":"2021-01-07T22:54:40","guid":{"rendered":"https:\/\/ciel-astro-ccd.com\/wp\/?page_id=2284"},"modified":"2023-05-06T23:42:36","modified_gmt":"2023-05-07T03:42:36","slug":"ngc6960","status":"publish","type":"page","link":"https:\/\/ciel-astro-ccd.com\/wp\/ngc6960\/","title":{"rendered":"NGC 6960"},"content":{"rendered":"\n
\"\"\/<\/a>
Cliquer sur l’image pour l’afficher plein \u00e9cran<\/em><\/figcaption><\/figure>\n\n\n\n
Date<\/strong>
2013\/08\/02

Lieu d\u2019observation<\/strong>
 Espagne<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

Technique<\/strong><\/h4>\n\n\n\n
T\u00e9lescope<\/td>Takahashi TOA-150, 150 mm, f\/7,3<\/td><\/tr>
Monture<\/td>Paramount ME<\/td><\/tr>
Cam\u00e9ra d\u2019imagerie<\/td>SBIG STL-11000M \u2013 r\u00e9gul\u00e9 \u00e0 -20o<\/sup> Celsius<\/td><\/tr>
Type d\u2019image<\/td>L(RVsB) (Vs pour vert syngh\u00e9tique<\/em>)<\/td><\/tr>
Exposition<\/td>Luminance (11 x 10\u2019 bin 2×2), RB (4 x 5\u2019 bin 3×3 chacune)<\/td><\/tr>
Pr\u00e9traitement<\/td>Maxim DL<\/a><\/td><\/tr>
Traitement<\/td>Photoshop et PixInsight<\/a><\/td><\/tr>
Traitement sp\u00e9cifique<\/td>Cr\u00e9er une image verte synth\u00e9tique<\/a><\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

Descripton de l\u2019objet<\/strong><\/h4>\n\n\n\n
Type d\u2019objet<\/td>N\u00e9buleuse \u00e0 \u00e9mission \u00ab La n\u00e9buleuse du Balai de Sorci\u00e8re \u00bb<\/td><\/tr>
Constellation<\/td>Cygne<\/td><\/tr>
Magnitude visuelle<\/td>–<\/td><\/tr>
Distance<\/td>1500 ann\u00e9es-lumi\u00e8re<\/td><\/tr>
Dimension vue de la Terre<\/td>70 x 6 minuttes d\u2019arc<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n
NGC6960 est surnomm\u00e9 la N\u00e9buleuse du Balai de Sorci\u00e8re. Elle fait partie d\u2019un vaste nuage de gaz et de poussi\u00e8res, d\u00e9nomm\u00e9 les N\u00e9buleuses du Voile du Cygne, r\u00e9pertori\u00e9 par plusieurs n\u00e9buleuses. On la d\u00e9signe sous les noms de la petite dentelle du cygne ou la n\u00e9buleuse du Balai de Sorci\u00e8re.  

La n\u00e9buleuse NGC6960 n\u2019est pas visible dans un petit t\u00e9lescope, car elle est tr\u00e8s sombre. Pour la voir dans un t\u00e9lescope d\u2019un grand diam\u00e8tre (8\u2019\u2019 et plus), il faut un ciel tr\u00e8s peu pollu\u00e9 par les lumi\u00e8res des villes. Aussi comme elle est tr\u00e8s sombre, elle est difficile \u00e0 photographier. Il faut un long temps d\u2019exposition par photo et l\u2019int\u00e9gration de plusieurs images.  

Pour faire ressortir les belles tonalit\u00e9s bleues de la n\u00e9buleuse, je me suis content\u00e9 d\u2019utiliser simplement un filtre clair comme image de luminance au lieu d\u2019un filtre H-Alpha, car ce dernier est sensible uniquement dans le spectre rouge de la n\u00e9buleuse. Il n\u2019\u00e9tait donc pas appropri\u00e9 pour cet objet. Aussi, pour faire ressortir les tr\u00e8s belles nuances bleues et rouges de la n\u00e9buleuse, je n\u2019ai pas utilis\u00e9 des filtres \u00e0 bandes \u00e9troites, car le site d\u2019observation est dans un environnement sans pollution lumineuse.  

Les n\u00e9buleuses du voile, dont fait partie NGC6960, repr\u00e9sentent les restes de plusieurs supernovas qui ont explos\u00e9. Un vestige de supernovas est l’\u00e9tat \u00e9volutif final d’une \u00e9toile massive (plus de 6 fois la masse du Soleil) qui ach\u00e8ve son existence par une \u00e9norme explosion. Apr\u00e8s l’explosion, il ne reste qu’un nuage gazeux en expansion rapide entourant le r\u00e9sidu de l’\u00e9toile. Ce gigantesque nuage gazeux (dont on voit ici qu\u2019une partie) est propice \u00e0 la formation de futures plan\u00e8tes. Les \u00e9toiles qui l\u2019entourent vont par gravit\u00e9, s\u2019approprier ces gaz et poussi\u00e8res. Ces poussi\u00e8res se mettront alors en orbite autour de ces \u00e9toiles. Par la suite, ces poussi\u00e8res s\u2019assembleront par gravit\u00e9 pour former de futures plan\u00e8tes. C\u2019est une superbe fourmili\u00e8re pour la cr\u00e9ation de plan\u00e8tes. Peut-\u00eatre, l\u2019une d\u2019entre elles sera propice \u00e0 la cr\u00e9ation de la vie !  <\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n
Richard Beauregard
Le Ciel Astro \u2013 CCD
Mon impression \u00ab Nous ne pouvons pas \u00eatre seuls dans ce gigantesque univers \u00bb<\/td><\/tr><\/tbody><\/table><\/figure>\n","protected":false},"excerpt":{"rendered":"

Date2013\/08\/02 Lieu d\u2019observation Espagne Technique T\u00e9lescope Takahashi TOA-150, 150 mm, f\/7,3 Monture Paramount ME Cam\u00e9ra d\u2019imagerie SBIG STL-11000M \u2013 r\u00e9gul\u00e9 \u00e0 -20o Celsius Type d\u2019image L(RVsB) (Vs pour vert syngh\u00e9tique) Exposition Luminance (11 x 10\u2019 bin 2×2), RB (4 x 5\u2019 bin 3×3 chacune) Pr\u00e9traitement Maxim DL Traitement Photoshop et PixInsight Traitement sp\u00e9cifique Cr\u00e9er une image verte synth\u00e9tique…<\/p>\n

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