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      <title>Le système solaire by </title>
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      <pubDate>2024-12-12 16:45:31 UTC</pubDate>
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         <title></title>
         <author>rahmaayed70_</author>
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         <pubDate>2024-12-12 17:15:31 UTC</pubDate>
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         <title></title>
         <author>rahmaayed70_</author>
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         <pubDate>2024-12-12 17:21:03 UTC</pubDate>
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      <item>
         <title></title>
         <author>rahmaayed70_</author>
         <link>https://padlet.com/rahmaayed70_/ajucr98835oj8t04/wish/3257578933</link>
         <description><![CDATA[]]></description>
         <enclosure url="https://fr.vikidia.org/wiki/Syst%C3%A8me_solaire" />
         <pubDate>2024-12-12 17:23:58 UTC</pubDate>
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      <item>
         <title></title>
         <author>rahmaayed70_</author>
         <link>https://padlet.com/rahmaayed70_/ajucr98835oj8t04/wish/3257580758</link>
         <description><![CDATA[]]></description>
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         <pubDate>2024-12-12 17:25:38 UTC</pubDate>
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      <item>
         <title></title>
         <author>rahmaayed70_</author>
         <link>https://padlet.com/rahmaayed70_/ajucr98835oj8t04/wish/3257582601</link>
         <description><![CDATA[]]></description>
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         <pubDate>2024-12-12 17:27:31 UTC</pubDate>
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      <item>
         <title>la planète Mercure</title>
         <author>rahmaayed70_</author>
         <link>https://padlet.com/rahmaayed70_/ajucr98835oj8t04/wish/3257586334</link>
         <description><![CDATA[<p><br/></p><p>Taille&nbsp;: 4878 km de diamètre<br>Masse&nbsp;: 330,2×10^21&nbsp;kg<br>Distance au soleil&nbsp;: de 46 Millions de km (Périhélie)&nbsp;à 70 Millions de km (Aphélie)<br>Distance depuis la Terre&nbsp;: 90 Millions de km à 210 Millions de km<br>Température&nbsp;: Entre -175°C et 427°C<br>Temps pour l’atteindre&nbsp;: 6 ans<br>1 jour mercurien&nbsp;: 176&nbsp;jours terrestres<br>1 année mercurienne&nbsp;: 88 jours terrestres<br>Missions vers Mercure&nbsp;: Mariner 10, Messenger, Bepicolombo<br>Surface&nbsp;: Paysage désolé fait de cratères et de fissures</p>]]></description>
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         <pubDate>2024-12-12 17:31:16 UTC</pubDate>
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      <item>
         <title>La planète Vénus</title>
         <author>rahmaayed70_</author>
         <link>https://padlet.com/rahmaayed70_/ajucr98835oj8t04/wish/3257590854</link>
         <description><![CDATA[<p><br>Taille&nbsp;:&nbsp; 12104 km de diamètre<br>Masse&nbsp;:&nbsp; 4,867E24 kg (0,815 Masse terrestre)<br>Distance au Soleil&nbsp;:&nbsp; de 107&nbsp;Millions de km (Périhélie)&nbsp;à 109&nbsp;Millions de km (Aphélie)<br>Caractéristique&nbsp;: Tourne sur elle-même dans le sens opposé des autres planètes&nbsp;<br>Température&nbsp;: 480°C au sol, de jour comme de nuit<br>Observation&nbsp;: Objet le plus lumineux après le Soleil et la Lune<br>1 jour vénusien&nbsp;: 243 jours terrestres<br>1 année vénusienne&nbsp;: 224 jours terrestres<br>Rotation de la couche nuageuse&nbsp;: 4 jours seulement</p>]]></description>
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         <pubDate>2024-12-12 17:35:50 UTC</pubDate>
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      <item>
         <title>la terre</title>
         <author>rahmaayed70_</author>
         <link>https://padlet.com/rahmaayed70_/ajucr98835oj8t04/wish/3257592273</link>
         <description><![CDATA[<p><br/></p><p>Taille&nbsp;: 12742 km de diamètre<br>Masse&nbsp;:&nbsp;5,972E24 kg (5,97200 × 10^21&nbsp;tonnes)<br>Distance au Soleil&nbsp;:&nbsp;150 millions de km<br>Distance à la Lune&nbsp;:&nbsp;384&nbsp;400 km<br>Caractéristique&nbsp;: seule planète connue abritant la vie<br>Âge&nbsp;:&nbsp;4,54 milliards d’années<br>Population humaine :&nbsp;7 milliards</p>]]></description>
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         <pubDate>2024-12-12 17:37:11 UTC</pubDate>
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      <item>
         <title></title>
         <author>rahmaayed70_</author>
         <link>https://padlet.com/rahmaayed70_/ajucr98835oj8t04/wish/3257593499</link>
         <description><![CDATA[]]></description>
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         <pubDate>2024-12-12 17:38:22 UTC</pubDate>
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      <item>
         <title>Mars</title>
         <author>rahmaayed70_</author>
         <link>https://padlet.com/rahmaayed70_/ajucr98835oj8t04/wish/3257594694</link>
         <description><![CDATA[<p>Taille&nbsp;: 6779 km de diamètre<br>Masse&nbsp;:&nbsp;&nbsp;639e21 kg (6,39 × 10^20&nbsp;tonnes)<br>Distance au Soleil&nbsp;:&nbsp;de&nbsp;207&nbsp;millions de&nbsp;km&nbsp;(Périhélie) à 250 millions de km (Aphélie)&nbsp;<br>Distance à la Terre:&nbsp;de 56 à 400 millions de km<br>Caractéristique&nbsp;: planète la plus étudiée après la Terre<br>Observation&nbsp;: visible à l’œil nu, couleur rouge<br>1 jour martien&nbsp;: Un peu plus d’un jour terrestre (24h 39 mn)<br>1 année martienne&nbsp;: 687 jours terrestres<br>Robots au sol&nbsp;:&nbsp;Opportunity (M.E.R) et Curiosity (M.S.L)</p>]]></description>
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         <pubDate>2024-12-12 17:39:29 UTC</pubDate>
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      <item>
         <title>Jupiter</title>
         <author>rahmaayed70_</author>
         <link>https://padlet.com/rahmaayed70_/ajucr98835oj8t04/wish/3257596227</link>
         <description><![CDATA[<p>Taille&nbsp;: 142984 km de diamètre<br>Masse&nbsp;: 1.90 × 10^27 kg (318 Terres)<br>Distance au soleil&nbsp;: 778,5 millions de km<br>Distance depuis la Terre&nbsp;: 600 Millions de km<br>Température&nbsp;: -161°C<br>1 jour jovien&nbsp;: 10 heures<br>1 année jovienne&nbsp;: 12 ans terrestres<br>Missions vers Jupiter&nbsp;: Galileo, Juno<br>Surface&nbsp;: Gaz d’hydrogène et d’hélium</p><p>&nbsp;</p>]]></description>
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         <pubDate>2024-12-12 17:40:58 UTC</pubDate>
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      <item>
         <title>Saturne</title>
         <author>rahmaayed70_</author>
         <link>https://padlet.com/rahmaayed70_/ajucr98835oj8t04/wish/3257597224</link>
         <description><![CDATA[<p>Place dans le système solaire&nbsp;: 6e planète<br>Taille&nbsp;: 116464 km de diamètre (2e plus grosse planète, 750 fois la taille de la Terre)<br>Masse&nbsp;: 5,683 × 10^26&nbsp;kg<br>Distance au soleil&nbsp;: 1,429&nbsp;milliard de km<br>Distance maximale depuis la Terre&nbsp;: 1 658 millions de km<br>Température&nbsp;: -180°C<br>1 jour sur Saturne&nbsp;: 10,6 heures.<br>Une année saturnienne&nbsp;: 29,5 ans<br>Surface&nbsp;: Gaz d’hydrogène et d’hélium</p>]]></description>
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         <pubDate>2024-12-12 17:42:04 UTC</pubDate>
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         <title>Uranus</title>
         <author>rahmaayed70_</author>
         <link>https://padlet.com/rahmaayed70_/ajucr98835oj8t04/wish/3257598900</link>
         <description><![CDATA[<p>Place dans le système solaire&nbsp;: 7e planète<br>Taille&nbsp;: 50724 km de diamètre (3e plus grosse planète)<br>Masse&nbsp;: 8,681 0×1025 kg<br>Distance au soleil&nbsp;: 3 milliards&nbsp;de km<br>Distance maximale depuis la Terre&nbsp;: 3 157 millions de km<br>Température&nbsp;: −225&nbsp;°C<br>1 jour sur Uranus&nbsp;: 17&nbsp;heures.<br>Une année sur Uranus&nbsp;: 84&nbsp;ans<br>Surface&nbsp;: gaz, roches en fusion et&nbsp;glaces</p>]]></description>
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         <pubDate>2024-12-12 17:43:52 UTC</pubDate>
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      <item>
         <title>Neptune</title>
         <author>rahmaayed70_</author>
         <link>https://padlet.com/rahmaayed70_/ajucr98835oj8t04/wish/3257601239</link>
         <description><![CDATA[<p>Place dans le système solaire&nbsp;: 8e planète<br>Taille&nbsp;: 49 244 km de diamètre<br>Masse&nbsp;: 1,024 × 10^26 kg<br>Distance au soleil&nbsp;: 4,498 milliards km<br>Distance maximale depuis la Terre&nbsp;: 4 687 millions de km<br>Température&nbsp;: −218&nbsp;°C<br>1 jour sur Neptune&nbsp;: 16&nbsp;heures.<br>Une année sur Neptune&nbsp;: 164,79&nbsp;ans<br>Surface&nbsp;: gaz, roches en fusion et&nbsp;glaces</p>]]></description>
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         <pubDate>2024-12-12 17:46:10 UTC</pubDate>
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      <item>
         <title></title>
         <author>rahmaayed70_</author>
         <link>https://padlet.com/rahmaayed70_/ajucr98835oj8t04/wish/3260267350</link>
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         <pubDate>2024-12-14 18:17:12 UTC</pubDate>
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      <item>
         <title></title>
         <author>rahmaayed70_</author>
         <link>https://padlet.com/rahmaayed70_/ajucr98835oj8t04/wish/3260269934</link>
         <description><![CDATA[]]></description>
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         <pubDate>2024-12-14 18:23:19 UTC</pubDate>
         <guid>https://padlet.com/rahmaayed70_/ajucr98835oj8t04/wish/3260269934</guid>
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      <item>
         <title>La lune </title>
         <author>rahmaayed70_</author>
         <link>https://padlet.com/rahmaayed70_/ajucr98835oj8t04/wish/3260273631</link>
         <description><![CDATA[<p>·&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <strong>Position&nbsp;:</strong>&nbsp;Unique satellite naturel de la Terre.</p><p>·&nbsp;&nbsp;&nbsp; <strong>Paramètre orbitaux&nbsp;:</strong></p><p>o&nbsp;&nbsp;&nbsp;&nbsp; Mouvement autour de la Terre&nbsp;:</p><p>§&nbsp; Période de révolution (mois sidéral)&nbsp;: 27,32 j.</p><p>§&nbsp; Inclinaison de l'orbite par rapport au plan équatorial de la Terre&nbsp;: 5,1°.</p><p>o&nbsp;&nbsp;&nbsp;&nbsp; Mouvement de rotation&nbsp;:</p><p>§&nbsp; Période de rotation (jour sidéral)&nbsp;: 27,32 j.</p><p>§&nbsp; Inclinaison du plan équatorial par rapport à l'orbite&nbsp;: 2,6°.</p><p>·&nbsp;&nbsp;&nbsp; <strong>Masse, taille, gravité, densité&nbsp;:</strong></p><p>o&nbsp;&nbsp;&nbsp; <em>Diamètre&nbsp;:</em>&nbsp;3.476&nbsp;km.</p><p>o&nbsp;&nbsp;&nbsp; <em>Masse volumique réelle&nbsp;:</em>&nbsp;3,36.</p><p>o&nbsp;&nbsp;&nbsp; <em>Masse volumique décomprimée&nbsp;:</em>&nbsp;3,35. (masse volumique ramenée à la pression atmosphérique, ce qui permet d'effacer l'effet des phases de hautes pressions (denses) à l'intérieur de la planète).</p><p>o&nbsp;&nbsp;&nbsp; <em>Champ gravitationnel&nbsp;:</em>&nbsp;1,57&nbsp;N/kg.</p><p>o&nbsp;&nbsp;&nbsp; <em>Vitesse de libération&nbsp;:</em>&nbsp;2,4&nbsp;km/s.</p><p>·&nbsp;&nbsp;&nbsp; <strong>Température de surface&nbsp;:</strong></p><p>o&nbsp;&nbsp;&nbsp; <em>Extrêmes&nbsp;:</em>&nbsp;jour&nbsp;: 127°C&nbsp;; nuit&nbsp;: -173°C.</p><p>o&nbsp;&nbsp;&nbsp; <em>Moyenne&nbsp;:</em>&nbsp;-18°C.</p><p>·&nbsp;&nbsp;&nbsp; <strong>Atmosphère&nbsp;:</strong></p><p>o&nbsp;&nbsp;&nbsp; <em>Aucune.</em></p><p>·&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <strong>Albédo&nbsp;:</strong>&nbsp;0,4.</p>]]></description>
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         <pubDate>2024-12-14 18:31:19 UTC</pubDate>
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      <item>
         <title>Ganymède</title>
         <author>rahmaayed70_</author>
         <link>https://padlet.com/rahmaayed70_/ajucr98835oj8t04/wish/3260274544</link>
         <description><![CDATA[<p>&nbsp;</p><p>·&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <strong>Position&nbsp;:&nbsp;</strong>Troisième satellite galliléen (diamètre supérieur à 3.000 km) à partir de Jupiter.</p><p>·&nbsp;&nbsp;&nbsp; <strong>Paramètre orbitaux&nbsp;:</strong></p><p>o&nbsp;&nbsp;&nbsp;&nbsp; Mouvement autour de Jupiter&nbsp;:</p><p>§&nbsp; Période de révolution (mois sidéral)&nbsp;: 7,16 j.</p><p>§&nbsp; Inclinaison de l'orbite par rapport au plan équatorial de la Terre&nbsp;: 0,2°.</p><p>o&nbsp;&nbsp;&nbsp;&nbsp; Mouvement de rotation&nbsp;:</p><p>§&nbsp; Période de rotation (jour sidéral)&nbsp;: 7,16 j.</p><p>·&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;</p><p>o&nbsp;&nbsp;&nbsp; <em>Diamètre&nbsp;:</em>&nbsp;5.280&nbsp;km.</p><p>o&nbsp;&nbsp;&nbsp; <em>Masse volumique réelle&nbsp;:</em>&nbsp;1,93.</p><p>o&nbsp;&nbsp;&nbsp; <em>Champ gravitationnel&nbsp;:</em>&nbsp;1,5&nbsp;N/kg.</p><p>o&nbsp;&nbsp;&nbsp; <em>Vitesse de libération&nbsp;:</em>&nbsp;3,6&nbsp;km/s.</p><p>·&nbsp;&nbsp;&nbsp; <strong>Température de surface&nbsp;:</strong></p><p>o&nbsp;&nbsp;&nbsp; <em>Moyenne&nbsp;:</em>&nbsp;-148°C.</p><p>·&nbsp;&nbsp;&nbsp; <strong>Atmosphère&nbsp;:</strong></p><p>o&nbsp;&nbsp;&nbsp; <em>Aucune.</em></p><p>·&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <strong>Albédo&nbsp;:</strong>&nbsp;0,4.</p>]]></description>
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         <pubDate>2024-12-14 18:33:51 UTC</pubDate>
         <guid>https://padlet.com/rahmaayed70_/ajucr98835oj8t04/wish/3260274544</guid>
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      <item>
         <title>Callisto</title>
         <author>rahmaayed70_</author>
         <link>https://padlet.com/rahmaayed70_/ajucr98835oj8t04/wish/3260274935</link>
         <description><![CDATA[<p>·&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <strong>Position&nbsp;:&nbsp;</strong>Quatrième satellite galliléen (diamètre supérieur à 3.000 km) à partir de Jupiter.</p><p>·&nbsp;&nbsp;&nbsp; <strong>Paramètre orbitaux&nbsp;:</strong></p><p>o&nbsp;&nbsp;&nbsp;&nbsp; Mouvement autour de Jupiter&nbsp;:</p><p>§&nbsp; Période de révolution (mois sidéral)&nbsp;: 16,17 j.</p><p>§&nbsp; Inclinaison de l'orbite par rapport au plan équatorial de la Terre&nbsp;: 0,3°.</p><p>o&nbsp;&nbsp;&nbsp;&nbsp; Mouvement de rotation&nbsp;:</p><p>§&nbsp; Période de rotation (jour sidéral)&nbsp;: 16,17 j.</p><p>·&nbsp;&nbsp;&nbsp; <strong>Masse, taille, gravité, densité&nbsp;:</strong></p><p>o&nbsp;&nbsp;&nbsp; <em>Diamètre&nbsp;:</em>&nbsp;4.840&nbsp;km.</p><p>o&nbsp;&nbsp;&nbsp; <em>Masse volumique réelle&nbsp;:</em>&nbsp;1,83.</p><p>o&nbsp;&nbsp;&nbsp; <em>Champ gravitationnel&nbsp;:</em>&nbsp;1,2&nbsp;N/kg.</p><p>o&nbsp;&nbsp;&nbsp; <em>Vitesse de libération&nbsp;:</em>&nbsp;2,4&nbsp;km/s.</p><p>·&nbsp;&nbsp;&nbsp; <strong>Température de surface&nbsp;:</strong></p><p>o&nbsp;&nbsp;&nbsp; <em>Moyenne&nbsp;:</em>&nbsp;-148°C.</p><p>·&nbsp;&nbsp;&nbsp; <strong>Atmosphère&nbsp;:</strong></p><p>o&nbsp;&nbsp;&nbsp; <em>Aucune.</em></p><p>·&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <strong>Albédo&nbsp;:</strong>&nbsp;0,4.</p><p>&nbsp;</p>]]></description>
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         <pubDate>2024-12-14 18:34:47 UTC</pubDate>
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      <item>
         <title>Titan</title>
         <author>rahmaayed70_</author>
         <link>https://padlet.com/rahmaayed70_/ajucr98835oj8t04/wish/3260275599</link>
         <description><![CDATA[<p>·&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <strong>Position&nbsp;:&nbsp;</strong>Seizième satellite de Saturne.</p><p>·&nbsp;&nbsp;&nbsp; <strong>Paramètre orbitaux&nbsp;:</strong></p><p>o&nbsp;&nbsp;&nbsp;&nbsp; Mouvement autour de Saturne&nbsp;:</p><p>§&nbsp; Période de révolution (mois sidéral)&nbsp;: 15,96 j.</p><p>§&nbsp; Inclinaison de l'orbite par rapport au plan équatorial de la Terre&nbsp;: 0,3°.</p><p>o&nbsp;&nbsp;&nbsp;&nbsp; Mouvement de rotation&nbsp;:</p><p>§&nbsp; Période de rotation (jour sidéral)&nbsp;: 15,96 j.</p><p>·&nbsp;&nbsp;&nbsp; <strong>Masse, taille, gravité, densité&nbsp;:</strong></p><p>o&nbsp;&nbsp;&nbsp; <em>Diamètre&nbsp;:</em>&nbsp;5.150&nbsp;km.</p><p>o&nbsp;&nbsp;&nbsp; <em>Masse volumique réelle&nbsp;:</em>&nbsp;1,9.</p><p>o&nbsp;&nbsp;&nbsp; <em>Champ gravitationnel&nbsp;:</em>&nbsp;1,37&nbsp;N/kg.</p><p>o&nbsp;&nbsp;&nbsp; <em>Vitesse de libération&nbsp;:</em>&nbsp;2,7&nbsp;km/s.</p><p>·&nbsp;&nbsp;&nbsp; <strong>Température de surface&nbsp;:</strong></p><p>o&nbsp;&nbsp;&nbsp; <em>Moyenne&nbsp;:</em>&nbsp;-183°C.</p><p>·&nbsp;&nbsp;&nbsp; <strong>Atmosphère&nbsp;:</strong></p><p>o&nbsp;&nbsp;&nbsp; <em>Pression à la surface&nbsp;:&nbsp;</em>1,5 bar.</p><p>o&nbsp;&nbsp;&nbsp; <em>Composition approximative&nbsp;:&nbsp;</em>90% N<sub>2</sub>, 10% CH<sub>4</sub>, traces Ar, brumes d'hydrocarbures.</p><p>·&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <strong>Albédo&nbsp;:</strong>&nbsp;0,2.</p><p>&nbsp;</p>]]></description>
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         <pubDate>2024-12-14 18:36:22 UTC</pubDate>
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      </item>
      <item>
         <title>Triton</title>
         <author>rahmaayed70_</author>
         <link>https://padlet.com/rahmaayed70_/ajucr98835oj8t04/wish/3260275947</link>
         <description><![CDATA[<p>·&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <strong>Position&nbsp;:&nbsp;</strong>Septième satellite de Neptune.</p><p>·&nbsp;&nbsp;&nbsp; <strong>Paramètre orbitaux&nbsp;:</strong></p><p>o&nbsp;&nbsp;&nbsp;&nbsp; Mouvement autour de Neptune&nbsp;:</p><p>§&nbsp; Période de révolution (mois sidéral)&nbsp;: 15,88 j.</p><p>§&nbsp; Inclinaison de l'orbite par rapport au plan équatorial de la Terre&nbsp;: 20°.</p><p>o&nbsp;&nbsp;&nbsp;&nbsp; Mouvement de rotation&nbsp;:</p><p>§&nbsp; Période de rotation (jour sidéral)&nbsp;: 5,88 j.</p><p>·&nbsp;&nbsp;&nbsp; <strong>Masse, taille, gravité, densité&nbsp;:</strong></p><p>o&nbsp;&nbsp;&nbsp; <em>Diamètre&nbsp;:</em>&nbsp;2.760&nbsp;km.</p><p>o&nbsp;&nbsp;&nbsp; <em>Masse volumique réelle&nbsp;:</em>&nbsp;2,0.</p><p>o&nbsp;&nbsp;&nbsp; <em>Champ gravitationnel&nbsp;:</em>&nbsp;0,6&nbsp;N/kg.</p><p>o&nbsp;&nbsp;&nbsp; <em>Vitesse de libération&nbsp;:</em>&nbsp;1,5&nbsp;km/s.</p><p>·&nbsp;&nbsp;&nbsp; <strong>Température de surface&nbsp;:</strong></p><p>o&nbsp;&nbsp;&nbsp; <em>Moyenne&nbsp;:</em>&nbsp;-236°C.</p><p>·&nbsp;&nbsp;&nbsp; <strong>Atmosphère&nbsp;:</strong></p><p>o&nbsp;&nbsp;&nbsp; <em>Pression à la surface&nbsp;:&nbsp;</em>10<sup>-5</sup>&nbsp;bar.</p><p>o&nbsp;&nbsp;&nbsp; <em>Composition approximative&nbsp;:&nbsp;</em>N<sub>2</sub>&nbsp;essentiellement.</p><p>·&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <strong>Albédo&nbsp;:</strong>&nbsp;0,8.</p><p>&nbsp;</p>]]></description>
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         <pubDate>2024-12-14 18:37:19 UTC</pubDate>
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         <pubDate>2024-12-14 18:38:47 UTC</pubDate>
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         <pubDate>2024-12-14 18:40:07 UTC</pubDate>
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         <pubDate>2024-12-14 18:43:20 UTC</pubDate>
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         <pubDate>2024-12-14 18:44:02 UTC</pubDate>
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         <pubDate>2024-12-14 18:47:15 UTC</pubDate>
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         <pubDate>2024-12-14 18:49:44 UTC</pubDate>
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         <title>carte mentale sur le système solaire</title>
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         <pubDate>2024-12-14 18:59:53 UTC</pubDate>
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         <title>les comètes</title>
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