{"id":16039,"date":"2025-10-13T19:24:56","date_gmt":"2025-10-13T22:24:56","guid":{"rendered":"https:\/\/oficialnoticias.com\/?p=16039"},"modified":"2025-10-13T19:25:00","modified_gmt":"2025-10-13T22:25:00","slug":"cometa-3i-atlas-mais-velho-que-o-sistema-solar-e-observado-perto-de-marte","status":"publish","type":"post","link":"https:\/\/oficialnoticias.com\/?p=16039","title":{"rendered":"Cometa 3I\/Atlas, mais velho que o Sistema Solar, \u00e9 observado perto de Marte"},"content":{"rendered":"<p>\n<\/p>\n<div>\n<p>Mais velho que o <bsp-link-enhancement><br \/>\n    <span class=\"LinkEnhancement\"><a class=\"Link\" href=\"https:\/\/www.itatiaia.com.br\/trends\/2025\/06\/05\/novo-planeta-no-sistema-solar-astronomos-identificam-possivel-novo-planeta\" title=\"&lt;b&gt;Sistema Solar&lt;\/b&gt;\"><b>Sistema Solar<\/b><\/a><\/span><\/bsp-link-enhancement>, o cometa 3I\/Atlas foi observado entre 1\u00b0 e 7 de outubro pelas naves ExoMars Trace Gas Orbiter (TGO) e Mars Express da ESA enquanto passava perto de <bsp-link-enhancement><br \/>\n    <span class=\"LinkEnhancement\"><a class=\"Link\" href=\"https:\/\/www.itatiaia.com.br\/itatiaia-tecnologia\/2024\/03\/18\/china-divulga-fotos-de-marte\" title=\"&lt;b&gt;Marte&lt;\/b&gt;\"><b>Marte<\/b><\/a><\/span><\/bsp-link-enhancement>. O \u2018intruso\u2019 interestelar foi visto durante a aproxima\u00e7\u00e3o m\u00e1xima ao Planeta Vermelho em 3 outubro, quando estava a 30 milh\u00f5es de quil\u00f4metros dele.<\/p>\n<p><bsp-list-loadmore class=\"PageListStandardG\" data-module=\"\" data-show-loadmore=\"true\" data-list-title-size=\"3\" data-list-description-size=\"3\"><\/p>\n<p>    <a class=\"AnchorLink\" title=\"leia-tambem\" name=\"leia-tambem\"\/><\/p>\n<p><\/bsp-list-loadmore><\/p>\n<p>A princ\u00edpio, o cometa \u00e9 observado sem a cauda, mas os cientistas acreditam que ela pode se tornar mais vis\u00edvel em observa\u00e7\u00f5es futuras \u00e0 medida que o cometa continua a aquecer e liberar mais g\u00e1s. As imagens registradas pelo ExoMars TGO mostram o cometa como um ponto branco ligeiramente difuso movendo-se para baixo pr\u00f3ximo ao centro da imagem.<\/p>\n<p>A partir do registro, \u00e9 poss\u00edvel observar o centro do cometa e compreender o seu n\u00facleo rochoso e gelado e a cabeleira circundante. Esta \u00faltima \u00e9 criada \u00e0 medida que o 3I\/Atlas se aproxima do Sol.<\/p>\n<p>O calor e a radia\u00e7\u00e3o d\u00e3o vida ao cometa, o que faz com que ele libere g\u00e1s e poeira, que se acumulam como um halo ao redor do n\u00facleo. \u00c9 comum que o material da cabeleira se arraste para uma longa cauda, que pode atingir milh\u00f5es de quil\u00f4metros \u00e0 medida que o cometa se aproxima do Sol.<\/p>\n<p>Apesar disso, a cauda ainda n\u00e3o \u00e9 vis\u00edvel nas imagens do CaSSIS. Nick Thomas, pesquisador principal da c\u00e2mera CaSSIS, explica: \u201cEsta foi uma observa\u00e7\u00e3o muito desafiadora para o instrumento. O cometa \u00e9 cerca de 10.000 a 100.000 vezes mais fraco do que o nosso alvo habitual.\u201d<\/p>\n<p>De acordo com a Administra\u00e7\u00e3o Nacional de Aeron\u00e1utica e Espa\u00e7o (Nasa), observa\u00e7\u00f5es at\u00e9 20 de agosto de 2025 indicam que o limite superior de seu di\u00e2metro \u00e9 de 5,6 quil\u00f4metros, embora possa ter apenas 440 metros de di\u00e2metro. <\/p>\n<p>No entanto, o tamanho e as propriedades f\u00edsicas do cometa interestelar ainda est\u00e3o sendo investigadas por astr\u00f4nomos ao redor do mundo. <\/p>\n<h2>Forasteiro no Sistema Solar<\/h2>\n<p>\u2018Intruso\u2019, o cometa 3I\/Atlas \u00e9 origin\u00e1rio de fora do Sistema Solar. O astro \u00e9 apenas o terceiro cometa interestelar j\u00e1 visto, atr\u00e1s apenas do o 1I\/\u02bbOumuamua \u202fem 2017 e\u202f o 2I\/Borisov \u202fem 2019, de acordo com a Ag\u00eancia Espacial Europeia.<\/p>\n<p>O 3I\/Atlas foi avistado pela primeira vez em 1\u00b0 de julho de 2025 pelo telesc\u00f3pio ATLAS (Asteroid Terrestrial-impact Last Alert System), em R\u00edo Hurtado, no Chile. Desde ent\u00e3o, astr\u00f4nomos t\u00eam usado telesc\u00f3pios terrestres e espaciais para monitorar o progresso do \u2018cometa forasteiro\u2019 e descobrir mais sobre ele.<\/p>\n<p>A partir da trajet\u00f3ria do astro, os astr\u00f4nomos acreditam que o 3I\/Atlas possa ser o cometa mais antigo j\u00e1 observado. Ele pode ser tr\u00eas bilh\u00f5es de anos mais velho que o Sistema Solar, que j\u00e1 tem 4,6 bilh\u00f5es de anos.<\/p>\n<p>Considerado um astro \u201cabsolutamente estranho\u201d, os cometas interestelares s\u00e3o verdadeiros forasteiros e carregam pistas sobre a forma\u00e7\u00e3o de mundos muito al\u00e9m do Sistema Solar, ou da Via Lactea. <\/p>\n<h2>Amea\u00e7a \u00e0 Terra?<\/h2>\n<p>Embora seja um cometa forasteiro, o astro n\u00e3o represente nenhuma amea\u00e7a \u00e0 Terra e permanecer\u00e1 distante. De acordo com a Nasa, o mais pr\u00f3ximo que o 3I\/Atlas se aproximar\u00e1 da terra \u00e9 cerca de 1,8 unidades astron\u00f4micas ou 270 milh\u00f5es de quil\u00f4metros. <\/p>\n<p>O astro atingir\u00e1 o ponto mais pr\u00f3ximo do Sol por volta de 30 de outubro de 2025, quando ficar\u00e1 a uma dist\u00e2ncia de cerca de 1,4 UA ou 210 milh\u00f5es de quil\u00f4metros), logo dentro da \u00f3rbita de Marte.<\/p>\n<h2>Como o cometa recebeu foi nomeado?<\/h2>\n<p>Os cometas s\u00e3o nomeados como uma refer\u00eancia a quem o descobriu e, neste caso, a equipe de pesquisa do Atlas. A letra \u201cI\u201d indica interstelar, ou seja, um forasteiro, formado al\u00e9m do Sistema Solar. O astro \u00e9 ainda o terceiro objeto interestelar conhecido, da\u00ed o numeral 3 no nome. <\/p>\n<p><i>(Sob supervis\u00e3o de Edu Oliveira)<\/i><\/p>\n<\/p><\/div>\n<p><script>\n  window.fbAsyncInit = function() {\n      FB.init({\n              appId : '1447052969554341',\n          xfbml : true,\n          version : 'v2.9'\n      });\n  };\n  (function(d, s, id){\n     var js, fjs = d.getElementsByTagName(s)[0];\n     if (d.getElementById(id)) {return;}\n     js = d.createElement(s); js.id = id;\n     js.src = \"https:\/\/connect.facebook.net\/en_US\/sdk.js\";\n     fjs.parentNode.insertBefore(js, fjs);\n   }(document, 'script', 'facebook-jssdk'));\n<\/script><br \/>\n  <\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Mais velho que o Sistema Solar, o cometa 3I\/Atlas foi observado entre 1\u00b0 e 7 de outubro pelas naves ExoMars Trace Gas Orbiter (TGO) e Mars Express da ESA enquanto passava perto de Marte. O \u2018intruso\u2019 interestelar foi visto durante a aproxima\u00e7\u00e3o m\u00e1xima ao Planeta Vermelho em 3 outubro, quando estava a 30 milh\u00f5es de&#8230;<\/p>\n","protected":false},"author":2,"featured_media":16040,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[2],"tags":[],"class_list":["post-16039","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-decor"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.3 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Cometa 3I\/Atlas, mais velho que o Sistema Solar, \u00e9 observado perto de Marte -<\/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:\/\/oficialnoticias.com\/?p=16039\" \/>\n<meta property=\"og:locale\" content=\"pt_BR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Cometa 3I\/Atlas, mais velho que o Sistema Solar, \u00e9 observado perto de Marte -\" \/>\n<meta property=\"og:description\" content=\"Mais velho que o Sistema Solar, o cometa 3I\/Atlas foi observado entre 1\u00b0 e 7 de outubro pelas naves ExoMars Trace Gas Orbiter (TGO) e Mars Express da ESA enquanto passava perto de Marte. O \u2018intruso\u2019 interestelar foi visto durante a aproxima\u00e7\u00e3o m\u00e1xima ao Planeta Vermelho em 3 outubro, quando estava a 30 milh\u00f5es de...\" \/>\n<meta property=\"og:url\" content=\"https:\/\/oficialnoticias.com\/?p=16039\" \/>\n<meta property=\"article:published_time\" content=\"2025-10-13T22:24:56+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2025-10-13T22:25:00+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/oficialnoticias.com\/wp-content\/uploads\/2025\/10\/urlhttps3A2F2Fk2-prod-radio-itatiaia.s3.us-east-1.amazonaws.com2Fbrightspot2F182F3c2Fabc3dd.webp\" \/>\n\t<meta property=\"og:image:width\" content=\"1200\" \/>\n\t<meta property=\"og:image:height\" content=\"630\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/webp\" \/>\n<meta name=\"author\" content=\"Luana Gon\u00e7alves\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Escrito por\" \/>\n\t<meta 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