{"id":11112,"date":"2022-02-16T10:18:00","date_gmt":"2022-02-16T15:18:00","guid":{"rendered":"https:\/\/mapfelwapfel.com\/?p=11112"},"modified":"2025-10-21T18:16:53","modified_gmt":"2025-10-21T22:16:53","slug":"pourquoi-la-lune-est-aussi-grosse-par-rapport-a-la-terre","status":"publish","type":"post","link":"https:\/\/mapfelwapfel.com\/en\/pourquoi-la-lune-est-aussi-grosse-par-rapport-a-la-terre\/","title":{"rendered":"Pourquoi la Lune est aussi grosse par rapport \u00e0 la Terre ?"},"content":{"rendered":"\n<p><a href=\"https:\/\/www.futura-sciences.com\/\"><\/a><\/p>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/cdn.futura-sciences.com\/buildsv6\/images\/wide1920\/b\/3\/2\/b32aed3033_50185141_moon-earth-sun.jpg\" alt=\"L'une des sp\u00e9cificit\u00e9s de la Lune est d'\u00eatre particuli\u00e8rement grosse par rapport \u00e0 la Terre. \u00a9 Studio-FI, Adobe Stock\" title=\"Pourquoi la Lune est aussi grosse par rapport \u00e0 la Terre ?\"\/><\/figure>\n\n\n\n<p><a href=\"https:\/\/www.futura-sciences.com\/sciences\/actualites\/espace-lune-aussi-grosse-rapport-terre-96733\/#\"><\/a><strong>SCIENCES<\/strong><\/p>\n\n\n\n<h1 class=\"wp-block-heading\"><\/h1>\n\n\n\n<p>ACTUALIT\u00c9<strong><em>Class\u00e9 sous :<\/em><a href=\"https:\/\/www.futura-sciences.com\/sciences\/espace\/\">ESPACE<\/a>&nbsp;,&nbsp;SYST\u00c8ME TERRE-LUNE&nbsp;,&nbsp;SYST\u00c8ME SOLAIRE<\/strong><\/p>\n\n\n\n<p>Publi\u00e9 le 16\/02\/2022<a href=\"https:\/\/eb2.3lift.com\/pass?tl_clickthrough=true&amp;redir=https%3A%2F%2Frtb-us-east.linkedin.com%2Flax%2Fclk%3Ftrk%3DCwEAAAF_CEJUtahThOJHpm9-p6Jo2Co5FJwRDwdoRfIF7lbVnx8mYFbPH3WJ1E0kAjESNaVCkle4nNi9AwYyQVcb71QLchw4Rq5nZDZcC_8DgJFBd8mohT8M3ZtfcFUJIpIUd-dK0RJcKDTjP5Afs8nNJ7Y6V5Nvy3ARRGTn9OTUceCquTCTYryqxidkISCXyIRTvwVnnphQR0BD56l9RlK92rgbi7mn-0acsKUXLHuW91Y_5106Fq8pGPZ9oiG8sy3koB8yK6BHm1I7owiONttOsYbE8M4CGbdsIOTBm8NAG2dzXPtfvBAOkbSjLo3qVkDmpKtmw3XDZtOQHIwUcuOzSZrIK9VUFe9hg_UEryKEnujWq_aBO-am682OTG1aZpuGJVN6_XO6eul1KW-3k-c7z5o71l2ucYKcpq59bD9xX-mPTGZlg4fgsSP9TH6AlbsZAvjC_CNzynV_mthZeEQQGyMvF59DMVI9PtrM3FkuQAQ7B4fEo4Es4kfEKvv6zWWbTxrQ53jYjFNAnqRpdIa-rwqJ91CNFaVbeYvCIL0kQH-Sk3vnewr-7sP-X8z9vjsy4hndVC4s5Vddcu0WSlAF0fY-Jnl95Z9ds_CovqZnEWIGPu6_vI4lg-I2kH3JEuRdSWatAHpqIf8vPB9ZNu5WKZV5Ybu1wqnHUSEkaRtGBlM4sJiS70YInkXdR14Nea_s74rwOxQatzB3t5a6jsk2YDYm9M_YiSrMFZ95Bo7VSzm5GjkcI0KMJooMdCcWDnmbHQlvPvQhfW_UlSrcFVlJi1NHFannsSJuyjJ7-BXFaNHL3SP1U-zCDAA6uhfRGvpw66y3PpvLJ8xJIkFXUNaYCYkvn3s93cqjYdzeu8EzEDEJbJbjSjn012_VqjmZMzgS3PJ7ra3GjmKoQTOomeGfRWjEa9VmRfXdflx_LaRkXvLqd_t_MACWvAsVo9Kx1gQcH5ksRAyIsqwX_O_jHGIIGyMxh2wjb0sDM3ug9z4ir0K7WTVFreev6AO-vSEqjS-CQ5Dkg2tY7hS1nAJrjhK3yrvpE4HGyEX_HnfWF1FevF0ESVEP9X53z2xdMEcG8hUY0ePdMl84WgFtOjhYkzzyh13cos02HNwkSmHLlSMOF0Wm09Pmt-IxmfqmTHumRnZ0Ar0VbLmuT0kGphe7rsl_ViD9v5Rmjnv206XSQu1W6DDGKVjt37zT2UWJxMPg8Vi_9GgaZgNIc1Qc0xCwVlrJnL9tAce9ER2uLnbDu6FPOySePQfE_JL3z8jF0lFf9TaBPYU5lO4j1jki10ep8NmPOs3fPdJCmt0sz9azQJACydlXOruktc_WI589GzK0BhquoC-hV7pPyMyjBIDrtp86QNpASY_lZ7ssgB1fWP-Da_YKNatmmbZ5UsT0PPZxa9DQFU_veLFOSGIv2po87I41SN7HA80zs1dZPp63pvgm9yojBw-SzsGS0xvSOlDOHLl_Zcz1hW0jtoZFd4M0sQ7PgkibftHDBqVgDpQuSUxRcXeWC2l4UL7I1ZQ6kZsbBvW0sqha5eFtNbon8u5cX7kjT3vUOA%26action%3Dclick%26laxrid%3Dddd02355-11b5-4b5e-815c-d13bce664e3d%26laxbid%3D2%26eid%3D3%26crtype%3Dvid%26laxerid%3D3523872375656945924500%26adfmt%3D6%26urle%3DCwEAAAF_CEJUxkqpZi6XsAxMMR22OTBhycKGT0grHD371tvZpR30iEXiK2m_cMYf-ASk4z0hn8GJrvR6TmD-PRfxZwdU9og1ai9jQ5utFfjnKNckaXbHjWhYUpfMZamZXl-P-0RllnvGLOMM7A66nyOkbZLVo8eUxhhme_t0Z1hj-FYV8FJUggQz5JkyoQPRjwlr9CSM6dstdVkJj07K4NGUmWVCRQR09VzrMgeiWNMChLqEpRAvV8-RhRr8ToWcrB9AMYTFL2rcvzc%26urlhash%3D0nZd&amp;ss=12&amp;bc=5.368&amp;pr=2.24846&amp;adid=163213316&amp;brid=556676&amp;bmid=6250&amp;biid=6250&amp;aid=3523872375656945924500&amp;bcud=5368&amp;sid=66552&amp;ts=1645111039&amp;cb=54028\" 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href=\"https:\/\/eb2.3lift.com\/pass?tl_clickthrough=true&amp;redir=https%3A%2F%2Frtb-us-east.linkedin.com%2Flax%2Fclk%3Ftrk%3DCwEAAAF_CEJUtahThOJHpm9-p6Jo2Co5FJwRDwdoRfIF7lbVnx8mYFbPH3WJ1E0kAjESNaVCkle4nNi9AwYyQVcb71QLchw4Rq5nZDZcC_8DgJFBd8mohT8M3ZtfcFUJIpIUd-dK0RJcKDTjP5Afs8nNJ7Y6V5Nvy3ARRGTn9OTUceCquTCTYryqxidkISCXyIRTvwVnnphQR0BD56l9RlK92rgbi7mn-0acsKUXLHuW91Y_5106Fq8pGPZ9oiG8sy3koB8yK6BHm1I7owiONttOsYbE8M4CGbdsIOTBm8NAG2dzXPtfvBAOkbSjLo3qVkDmpKtmw3XDZtOQHIwUcuOzSZrIK9VUFe9hg_UEryKEnujWq_aBO-am682OTG1aZpuGJVN6_XO6eul1KW-3k-c7z5o71l2ucYKcpq59bD9xX-mPTGZlg4fgsSP9TH6AlbsZAvjC_CNzynV_mthZeEQQGyMvF59DMVI9PtrM3FkuQAQ7B4fEo4Es4kfEKvv6zWWbTxrQ53jYjFNAnqRpdIa-rwqJ91CNFaVbeYvCIL0kQH-Sk3vnewr-7sP-X8z9vjsy4hndVC4s5Vddcu0WSlAF0fY-Jnl95Z9ds_CovqZnEWIGPu6_vI4lg-I2kH3JEuRdSWatAHpqIf8vPB9ZNu5WKZV5Ybu1wqnHUSEkaRtGBlM4sJiS70YInkXdR14Nea_s74rwOxQatzB3t5a6jsk2YDYm9M_YiSrMFZ95Bo7VSzm5GjkcI0KMJooMdCcWDnmbHQlvPvQhfW_UlSrcFVlJi1NHFannsSJuyjJ7-BXFaNHL3SP1U-zCDAA6uhfRGvpw66y3PpvLJ8xJIkFXUNaYCYkvn3s93cqjYdzeu8EzEDEJbJbjSjn012_VqjmZMzgS3PJ7ra3GjmKoQTOomeGfRWjEa9VmRfXdflx_LaRkXvLqd_t_MACWvAsVo9Kx1gQcH5ksRAyIsqwX_O_jHGIIGyMxh2wjb0sDM3ug9z4ir0K7WTVFreev6AO-vSEqjS-CQ5Dkg2tY7hS1nAJrjhK3yrvpE4HGyEX_HnfWF1FevF0ESVEP9X53z2xdMEcG8hUY0ePdMl84WgFtOjhYkzzyh13cos02HNwkSmHLlSMOF0Wm09Pmt-IxmfqmTHumRnZ0Ar0VbLmuT0kGphe7rsl_ViD9v5Rmjnv206XSQu1W6DDGKVjt37zT2UWJxMPg8Vi_9GgaZgNIc1Qc0xCwVlrJnL9tAce9ER2uLnbDu6FPOySePQfE_JL3z8jF0lFf9TaBPYU5lO4j1jki10ep8NmPOs3fPdJCmt0sz9azQJACydlXOruktc_WI589GzK0BhquoC-hV7pPyMyjBIDrtp86QNpASY_lZ7ssgB1fWP-Da_YKNatmmbZ5UsT0PPZxa9DQFU_veLFOSGIv2po87I41SN7HA80zs1dZPp63pvgm9yojBw-SzsGS0xvSOlDOHLl_Zcz1hW0jtoZFd4M0sQ7PgkibftHDBqVgDpQuSUxRcXeWC2l4UL7I1ZQ6kZsbBvW0sqha5eFtNbon8u5cX7kjT3vUOA%26action%3Dclick%26laxrid%3Dddd02355-11b5-4b5e-815c-d13bce664e3d%26laxbid%3D2%26eid%3D3%26crtype%3Dvid%26laxerid%3D3523872375656945924500%26adfmt%3D6%26urle%3DCwEAAAF_CEJUxkqpZi6XsAxMMR22OTBhycKGT0grHD371tvZpR30iEXiK2m_cMYf-ASk4z0hn8GJrvR6TmD-PRfxZwdU9og1ai9jQ5utFfjnKNckaXbHjWhYUpfMZamZXl-P-0RllnvGLOMM7A66nyOkbZLVo8eUxhhme_t0Z1hj-FYV8FJUggQz5JkyoQPRjwlr9CSM6dstdVkJj07K4NGUmWVCRQR09VzrMgeiWNMChLqEpRAvV8-RhRr8ToWcrB9AMYTFL2rcvzc%26urlhash%3D0nZd&amp;ss=12&amp;bc=5.368&amp;pr=2.24846&amp;adid=163213316&amp;brid=556676&amp;bmid=6250&amp;biid=6250&amp;aid=3523872375656945924500&amp;bcud=5368&amp;sid=66552&amp;ts=1645111039&amp;cb=54028\" target=\"_blank\" rel=\"noreferrer noopener\">Radiant Canada is more than just a customer-centric global logistics corporation. We are your trusted and committed business partner who will step up as needed! \u2713 Work with any type of industry &amp; business size \u2713 Flexible &amp; comprehensive product transportation &amp; warehousing all over the world \u2713&#8230;<\/a><a href=\"https:\/\/eb2.3lift.com\/pass?tl_clickthrough=true&amp;redir=https%3A%2F%2Frtb-us-east.linkedin.com%2Flax%2Fclk%3Ftrk%3DCwEAAAF_CEJUtahThOJHpm9-p6Jo2Co5FJwRDwdoRfIF7lbVnx8mYFbPH3WJ1E0kAjESNaVCkle4nNi9AwYyQVcb71QLchw4Rq5nZDZcC_8DgJFBd8mohT8M3ZtfcFUJIpIUd-dK0RJcKDTjP5Afs8nNJ7Y6V5Nvy3ARRGTn9OTUceCquTCTYryqxidkISCXyIRTvwVnnphQR0BD56l9RlK92rgbi7mn-0acsKUXLHuW91Y_5106Fq8pGPZ9oiG8sy3koB8yK6BHm1I7owiONttOsYbE8M4CGbdsIOTBm8NAG2dzXPtfvBAOkbSjLo3qVkDmpKtmw3XDZtOQHIwUcuOzSZrIK9VUFe9hg_UEryKEnujWq_aBO-am682OTG1aZpuGJVN6_XO6eul1KW-3k-c7z5o71l2ucYKcpq59bD9xX-mPTGZlg4fgsSP9TH6AlbsZAvjC_CNzynV_mthZeEQQGyMvF59DMVI9PtrM3FkuQAQ7B4fEo4Es4kfEKvv6zWWbTxrQ53jYjFNAnqRpdIa-rwqJ91CNFaVbeYvCIL0kQH-Sk3vnewr-7sP-X8z9vjsy4hndVC4s5Vddcu0WSlAF0fY-Jnl95Z9ds_CovqZnEWIGPu6_vI4lg-I2kH3JEuRdSWatAHpqIf8vPB9ZNu5WKZV5Ybu1wqnHUSEkaRtGBlM4sJiS70YInkXdR14Nea_s74rwOxQatzB3t5a6jsk2YDYm9M_YiSrMFZ95Bo7VSzm5GjkcI0KMJooMdCcWDnmbHQlvPvQhfW_UlSrcFVlJi1NHFannsSJuyjJ7-BXFaNHL3SP1U-zCDAA6uhfRGvpw66y3PpvLJ8xJIkFXUNaYCYkvn3s93cqjYdzeu8EzEDEJbJbjSjn012_VqjmZMzgS3PJ7ra3GjmKoQTOomeGfRWjEa9VmRfXdflx_LaRkXvLqd_t_MACWvAsVo9Kx1gQcH5ksRAyIsqwX_O_jHGIIGyMxh2wjb0sDM3ug9z4ir0K7WTVFreev6AO-vSEqjS-CQ5Dkg2tY7hS1nAJrjhK3yrvpE4HGyEX_HnfWF1FevF0ESVEP9X53z2xdMEcG8hUY0ePdMl84WgFtOjhYkzzyh13cos02HNwkSmHLlSMOF0Wm09Pmt-IxmfqmTHumRnZ0Ar0VbLmuT0kGphe7rsl_ViD9v5Rmjnv206XSQu1W6DDGKVjt37zT2UWJxMPg8Vi_9GgaZgNIc1Qc0xCwVlrJnL9tAce9ER2uLnbDu6FPOySePQfE_JL3z8jF0lFf9TaBPYU5lO4j1jki10ep8NmPOs3fPdJCmt0sz9azQJACydlXOruktc_WI589GzK0BhquoC-hV7pPyMyjBIDrtp86QNpASY_lZ7ssgB1fWP-Da_YKNatmmbZ5UsT0PPZxa9DQFU_veLFOSGIv2po87I41SN7HA80zs1dZPp63pvgm9yojBw-SzsGS0xvSOlDOHLl_Zcz1hW0jtoZFd4M0sQ7PgkibftHDBqVgDpQuSUxRcXeWC2l4UL7I1ZQ6kZsbBvW0sqha5eFtNbon8u5cX7kjT3vUOA%26action%3Dclick%26laxrid%3Dddd02355-11b5-4b5e-815c-d13bce664e3d%26laxbid%3D2%26eid%3D3%26crtype%3Dvid%26laxerid%3D3523872375656945924500%26adfmt%3D6%26urle%3DCwEAAAF_CEJUxkqpZi6XsAxMMR22OTBhycKGT0grHD371tvZpR30iEXiK2m_cMYf-ASk4z0hn8GJrvR6TmD-PRfxZwdU9og1ai9jQ5utFfjnKNckaXbHjWhYUpfMZamZXl-P-0RllnvGLOMM7A66nyOkbZLVo8eUxhhme_t0Z1hj-FYV8FJUggQz5JkyoQPRjwlr9CSM6dstdVkJj07K4NGUmWVCRQR09VzrMgeiWNMChLqEpRAvV8-RhRr8ToWcrB9AMYTFL2rcvzc%26urlhash%3D0nZd&amp;ss=12&amp;bc=5.368&amp;pr=2.24846&amp;adid=163213316&amp;brid=556676&amp;bmid=6250&amp;biid=6250&amp;aid=3523872375656945924500&amp;bcud=5368&amp;sid=66552&amp;ts=1645111039&amp;cb=54028\" target=\"_blank\" rel=\"noreferrer noopener\">Voir Plus<\/a><\/p>\n\n\n\n<p>Par rapport aux autres lunes du Syst\u00e8me solaire, notre Lune a une caract\u00e9ristique bien sp\u00e9cifique&nbsp;: elle est particuli\u00e8rement grosse par rapport \u00e0 la Terre. Des chercheurs viennent de montrer que la masse relativement faible de la Terre et sa composition&nbsp;seraient les facteurs principaux permettant la cr\u00e9ation d&#8217;une lune imposante lors d&#8217;une collision majeure.<a href=\"https:\/\/www.futura-sciences.com\/lettres-d-informations\/?utm_medium=email&amp;utm_source=nlbox&amp;utm_campaign=inscriptions_nlbox&amp;optin_sciences=1&amp;source=NlBox:actualite&amp;hook_futura&amp;utm_content=actualite\">Vous aimez nos Actualit\u00e9s&nbsp;?<\/a><a href=\"https:\/\/www.futura-sciences.com\/lettres-d-informations\/?utm_medium=email&amp;utm_source=nlbox&amp;utm_campaign=inscriptions_nlbox&amp;optin_sciences=1&amp;source=NlBox:actualite&amp;hook_futura&amp;utm_content=actualite\">Inscrivez-vous \u00e0 la lettre d&#8217;information&nbsp;La quotidienne&nbsp;pour recevoir nos toutes derni\u00e8res Actualit\u00e9s une fois par jour.<\/a>Cela vous int\u00e9ressera aussi<\/p>\n\n\n\n<p><strong>&nbsp;[EN VID\u00c9O] Observation directe de la formation d&#8217;une exolune<\/strong>&nbsp;&nbsp;<strong>Le radiot\u00e9lescope g\u00e9ant Alma a r\u00e9alis\u00e9 la premi\u00e8re image directe d&#8217;une lune en train de se former autour d&#8217;une tr\u00e8s jeune plan\u00e8te g\u00e9ante.<\/strong>&nbsp;<\/p>\n\n\n\n<p>Au sein du Syst\u00e8me Solaire, la Terre a de nombreuses particularit\u00e9s. L&#8217;une d&#8217;elles est d&#8217;avoir une lune relativement grande. Notre Lune atteint en effet environ 1 % de la&nbsp;<a href=\"https:\/\/www.futura-sciences.com\/sciences\/definitions\/physique-masse-15213\/\">masse<\/a>&nbsp;de la Terre. Une taille exceptionnelle pour un satellite. Toutes les autres&nbsp;<a href=\"https:\/\/www.futura-sciences.com\/sciences\/definitions\/univers-lune-2550\/\">lunes<\/a>&nbsp;du Syst\u00e8me solaire, dont les lunes des&nbsp;<a href=\"https:\/\/www.futura-sciences.com\/sciences\/definitions\/univers-planete-geante-4547\/\">plan\u00e8tes g\u00e9antes<\/a>, font en effet moins d&#8217;un dix-milli\u00e8me de la masse de leur plan\u00e8te, \u00e0 l&#8217;exception de Charon, qui p\u00e8se 12 % de la masse de&nbsp;<a href=\"https:\/\/www.futura-sciences.com\/sciences\/definitions\/univers-pluton-3691\/\">Pluton<\/a>. Qu&#8217;est-ce qui a donc pu permettre cette sp\u00e9cificit\u00e9&nbsp;?<\/p>\n\n\n\n<p>Pour rappel, la Lune a \u00e9t\u00e9 form\u00e9e lors&nbsp;<a href=\"https:\/\/www.futura-sciences.com\/sciences\/actualites\/lune-faut-il-revoir-scenario-formation-lune-76415\/\">d\u2019un gigantesque impact entre un corps plan\u00e9taire et la Terre primitive<\/a>. Pour les scientifiques, cette collision est certainement l&#8217;une des explications \u00e0 la taille exceptionnelle de la Lune par rapport \u00e0 la Terre. Pourtant, cela n&#8217;explique pas tout. Car les grandes collisions de ce type ont \u00e9t\u00e9 l\u00e9gion au d\u00e9but de la formation du Syst\u00e8me solaire. Et pourtant, les lunes de Mars,&nbsp;<a href=\"https:\/\/www.futura-sciences.com\/sciences\/definitions\/univers-jupiter-3714\/\">Jupiter<\/a>,&nbsp;<a href=\"https:\/\/www.futura-sciences.com\/sciences\/definitions\/saturne-saturne-3703\/\">Saturne<\/a>,&nbsp;<a href=\"https:\/\/www.futura-sciences.com\/sciences\/definitions\/univers-uranus-3697\/\">Uranus<\/a>&nbsp;et&nbsp;<a href=\"https:\/\/www.futura-sciences.com\/sciences\/definitions\/univers-neptune-3693\/\">Neptune<\/a>&nbsp;ont une taille relativement faible. \u00c0 noter que&nbsp;<a href=\"https:\/\/www.futura-sciences.com\/sciences\/definitions\/astronomie-mercure-3722\/\">Mercure<\/a>&nbsp;et V\u00e9nus n&#8217;ont pas de satellite naturel.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Des petites plan\u00e8tes pour former de grandes lunes<\/h2>\n\n\n\n<p>La diversit\u00e9 des lunes que nous observons dans notre Syst\u00e8me solaire r\u00e9sulte en effet de la diversit\u00e9 des processus menant \u00e0 leur formation. Car toutes ne sont pas issues d&#8217;une collision. La plupart des satellites naturels comme les lunes de Jupiter ou Titan, la lune de Saturne, se sont condens\u00e9es \u00e0 partir d&#8217;un disque de&nbsp;<a href=\"https:\/\/www.futura-sciences.com\/sciences\/definitions\/matiere-matiere-15841\/\">mati\u00e8re<\/a>&nbsp;r\u00e9siduel suite \u00e0 la formation de leur plan\u00e8te m\u00e8re.&nbsp;<a href=\"https:\/\/www.futura-sciences.com\/sciences\/actualites\/systeme-solaire-rebondissement-origine-enigmatique-phobos-deimos-lunes-mars-63417\/\">Les lunes de Mars (Phobos et Deimos)<\/a>, ainsi que&nbsp;<a href=\"https:\/\/www.futura-sciences.com\/sciences\/actualites\/neptune-nasa-veut-mettre-cap-triton-lune-fascinante-neptune-75812\/\">la lune de Neptune (Triton)<\/a>, seraient en r\u00e9alit\u00e9 des corps rocheux captur\u00e9s par le champ gravitationnel de ces deux plan\u00e8tes, m\u00eame si cette hypoth\u00e8se est discut\u00e9e. Seuls notre Lune et Charon seraient issues des d\u00e9bris d&#8217;impacts majeurs avec des corps protoplan\u00e9taires.<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/cdn.futura-sciences.com\/buildsv6\/images\/mediumoriginal\/6\/3\/9\/6394e304a6_114529_pluton-charon-newhorizons-juillet15-nasa.jpg\" alt=\"Pluton et sa lune g\u00e9ante, Charon. \u00a9 Nasa\" title=\"Pluton et sa lune g\u00e9ante, Charon. \u00a9 Nasa\"\/><\/figure>\n\n\n\n<p><a href=\"https:\/\/www.futura-sciences.com\/#\"><\/a><\/p>\n\n\n\n<p><strong>Pluton et sa lune g\u00e9ante, Charon. \u00a9 Nasa<\/strong>&nbsp;<\/p>\n\n\n\n<p>Dans un article publi\u00e9 dans&nbsp;<em><a href=\"https:\/\/www.nature.com\/articles\/s41467-022-28063-8\" target=\"_blank\" rel=\"noreferrer noopener\">Nature Communications<\/a><\/em>, une \u00e9quipe de scientifiques a observ\u00e9 la formation de lunes apr\u00e8s un tel impact, gr\u00e2ce \u00e0 la&nbsp;<a href=\"https:\/\/www.futura-sciences.com\/tech\/definitions\/informatique-simulation-informatique-11319\/\">simulation num\u00e9rique<\/a>. Ils ont notamment \u00e9tudi\u00e9 l&#8217;influence de diff\u00e9rents param\u00e8tres, comme la nature des corps plan\u00e9taires entrant en collision, ainsi que leurs masses respectives.<\/p>\n\n\n\n<p>Les chercheurs ont ainsi montr\u00e9 que lors d&#8217;un impact majeur, seules les&nbsp;<a href=\"https:\/\/www.futura-sciences.com\/sciences\/definitions\/univers-planete-tellurique-4545\/\">plan\u00e8tes rocheuses<\/a>&nbsp;de masse inf\u00e9rieure \u00e0 six fois celle de la Terre et les plan\u00e8tes glac\u00e9es de moins d&#8217;une masse terrestre peuvent former une lune de taille relativement importante.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Le facteur limitant&nbsp;: la quantit\u00e9 de gaz dans le disque de d\u00e9bris<\/h2>\n\n\n\n<p>Dans leurs simulations, les scientifiques ont mod\u00e9lis\u00e9 plusieurs types de collisions&nbsp;: entre deux protoplan\u00e8tes rocheuses ou entre deux&nbsp;<a href=\"https:\/\/www.futura-sciences.com\/sciences\/actualites\/exoplanete-finalement-planetes-glacees-pourraient-abriter-vie-77074\/\">protoplan\u00e8tes glac\u00e9es<\/a>. Ces deux types de plan\u00e8tes se diff\u00e9rencient par leurs compositions. Les plan\u00e8tes rocheuses contiennent un noyau de&nbsp;<a href=\"https:\/\/www.futura-sciences.com\/sciences\/definitions\/chimie-fer-721\/\">fer<\/a>&nbsp;et un&nbsp;<a href=\"https:\/\/www.futura-sciences.com\/planete\/definitions\/structure-terre-manteau-terrestre-2495\/\">manteau<\/a>&nbsp;silicat\u00e9, alors que les plan\u00e8tes glac\u00e9es ont un noyau silicat\u00e9 et un manteau principalement compos\u00e9 de glace d&#8217;eau. Les simulations montrent que dans chacun des deux cas, la collision g\u00e9n\u00e8re un&nbsp;<a href=\"https:\/\/www.futura-sciences.com\/planete\/definitions\/climatologie-nuage-14525\/\">nuage<\/a>&nbsp;de fines particules et de&nbsp;<a href=\"https:\/\/www.futura-sciences.com\/sciences\/definitions\/chimie-gaz-15336\/\">gaz<\/a>, qui va ensuite se condenser pour reformer un nouveau corps, une lune.https:\/\/6d5fd49ff562eb16513493ff1366131c.safeframe.googlesyndication.com\/safeframe\/1-0-38\/html\/container.html<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/cdn.futura-sciences.com\/buildsv6\/images\/mediumoriginal\/d\/c\/b\/dcb46d0ed5_50180949_encelade.jpg\" alt=\"La Lune de Saturne, Encelade, s'apparente \u00e0 une plan\u00e8te glac\u00e9e. \u00a9 Nasa\" title=\"La Lune de Saturne, Encelade, s'apparente \u00e0 une plan\u00e8te glac\u00e9e. \u00a9 Nasa\"\/><\/figure>\n\n\n\n<p><a href=\"https:\/\/www.futura-sciences.com\/#\"><\/a><\/p>\n\n\n\n<p><strong>La Lune de Saturne, Encelade, s&#8217;apparente \u00e0 une plan\u00e8te glac\u00e9e. \u00a9 Nasa<\/strong>&nbsp;<\/p>\n\n\n\n<p>Cependant, les valeurs des masses entrant en collision jouent un r\u00f4le important sur le r\u00e9sultat final. Il appara\u00eet que pour des plan\u00e8tes rocheuses (aussi appel\u00e9es&nbsp;<a href=\"https:\/\/www.futura-sciences.com\/sciences\/questions-reponses\/astronomie-planete-tellurique-planete-gazeuse-differences-6462\/\">telluriques<\/a>) six fois plus lourdes que la Terre, les lunes r\u00e9sultant de la collision seront relativement petites. Il en va de m\u00eame pour des plan\u00e8tes glac\u00e9es de masse sup\u00e9rieure \u00e0 une fois celle de la Terre. Seules des valeurs inf\u00e9rieures \u00e0 ces masses&nbsp;peuvent mener \u00e0 la cr\u00e9ation de lunes relativement imposantes, d&#8217;au moins quelques pourcents de la masse de la plan\u00e8te m\u00e8re. L&#8217;un des facteurs limitant \u00e0 la cr\u00e9ation de grandes lunes semble&nbsp;\u00eatre la quantit\u00e9 de vapeurs (de&nbsp;<a href=\"https:\/\/www.futura-sciences.com\/planete\/definitions\/geologie-silicate-1613\/\">silicate<\/a>&nbsp;ou d&#8217;eau en fonction du type de plan\u00e8te) pr\u00e9sente dans le disque de d\u00e9bris.<\/p>\n\n\n\n<p>En effet, un disque principalement compos\u00e9 de gaz&nbsp;ne m\u00e8nera pas \u00e0 la formation d&#8217;une lune. Dans le cas de plan\u00e8tes tr\u00e8s massives, les d\u00e9bris vont ainsi rapidement retomber sur la plan\u00e8te avant qu&#8217;ils aient pu former une lune. \u00c0 l&#8217;inverse, pour des plan\u00e8tes plus petites, comme la Terre, la quantit\u00e9 plus faible de gaz permet aux diff\u00e9rents mat\u00e9riaux de graviter les uns autour&nbsp;des autres, menant \u00e9ventuellement \u00e0 la formation d&#8217;une grande lune (simulation ci-dessous).https:\/\/www.youtube.com\/embed\/DaYWDvrhL68?rel=0&amp;start=8<\/p>\n\n\n\n<p>Simulation de la formation d&#8217;une grande lune. \u00a9 AGU, YouTubehttps:\/\/6d5fd49ff562eb16513493ff1366131c.safeframe.googlesyndication.com\/safeframe\/1-0-38\/html\/container.html<\/p>\n\n\n\n<p>Ces r\u00e9sultats aident \u00e0 comprendre l&#8217;\u00e9volution du couple Terre-Lune et donnent des pistes de recherche pour la d\u00e9tection de potentielles \u00ab&nbsp;exolunes&nbsp;\u00bb autour de plan\u00e8tes de masse proche de celle de la Terre.Int\u00e9ress\u00e9 par ce que vous venez de lire ?Abonnez-vous \u00e0 la lettre d&#8217;information&nbsp;<strong>La quotidienne<\/strong>&nbsp;: nos derni\u00e8res actualit\u00e9s du jour.&nbsp;Toutes nos lettres d\u2019informationVotre e-mailS&#8217;ABONNERLiens externesLarge planets may not form fractionally large moonsTo Make a Big Moon, Start with a Small PlanetD\u00e9finitions associ\u00e9esLe syst\u00e8me solaire : qu&#8217;est-ce que c&#8217;est ?Signification de &#8220;Titan&#8221;V\u00e9nus : qu&#8217;est-ce que c&#8217;est ?C&#8217;est quoi, une petite plan\u00e8te ?Charon : qu&#8217;est-ce que c&#8217;est ?SUIVEZ-NOUS SUR LES R\u00c9SEAUX SOCIAUX<\/p>\n\n\n\n<figure class=\"wp-block-embed is-type-video is-provider-youtube wp-block-embed-youtube wp-embed-aspect-4-3 wp-has-aspect-ratio\"><div class=\"wp-block-embed__wrapper\">\n<iframe loading=\"lazy\" title=\"To Make a Big Moon, Start with a Small Planet - Rocky Edition\" width=\"1100\" height=\"825\" src=\"https:\/\/www.youtube.com\/embed\/DaYWDvrhL68?start=8&#038;feature=oembed\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture\" allowfullscreen><\/iframe>\n<\/div><\/figure>\n<script>;<\/script><script>;<\/script><script>;<\/script><script>;<\/script><script>;<\/script><script>;<\/script><script>;<\/script><script>;<\/script>","protected":false},"excerpt":{"rendered":"<p>SCIENCES ACTUALIT\u00c9Class\u00e9 sous :ESPACE&nbsp;,&nbsp;SYST\u00c8ME TERRE-LUNE&nbsp;,&nbsp;SYST\u00c8ME SOLAIRE Publi\u00e9 le 16\/02\/2022 SPONSORIS\u00c9 Radiant Canada | We Champion Our Clients&#8217; Needs par&nbsp;Radiant Logistics (Canada),&#8230; Radiant Canada is more than just a customer-centric global logistics corporation. We are your trusted and committed business partner who will step up as needed! \u2713 Work with any type of industry &amp; business size \u2713 Flexible &amp; comprehensive [&hellip;]<\/p>\n","protected":false},"author":3,"featured_media":11703,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[501,1451,1460],"tags":[],"class_list":["post-11112","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-a-la-une","category-la-nature","category-science"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.5 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Pourquoi la Lune est aussi grosse par rapport \u00e0 la Terre ? - Map F\u00e8l, Wap F\u00e8l<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/mapfelwapfel.com\/en\/pourquoi-la-lune-est-aussi-grosse-par-rapport-a-la-terre\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Pourquoi la Lune est aussi grosse par rapport \u00e0 la Terre ? - Map F\u00e8l, Wap F\u00e8l\" \/>\n<meta property=\"og:description\" content=\"SCIENCES ACTUALIT\u00c9Class\u00e9 sous :ESPACE&nbsp;,&nbsp;SYST\u00c8ME TERRE-LUNE&nbsp;,&nbsp;SYST\u00c8ME SOLAIRE Publi\u00e9 le 16\/02\/2022 SPONSORIS\u00c9 Radiant Canada | We Champion Our Clients&#8217; Needs par&nbsp;Radiant Logistics (Canada),&#8230; Radiant Canada is more than just a customer-centric global logistics corporation. 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