{"id":4097,"date":"2025-10-29T16:03:03","date_gmt":"2025-10-29T19:03:03","guid":{"rendered":"https:\/\/overticeportal.com.br\/?p=4097"},"modified":"2025-10-29T16:42:03","modified_gmt":"2025-10-29T19:42:03","slug":"buscas-por-cometa-sobem-apos-comportamento-incomum-do-3i-atlas","status":"publish","type":"post","link":"https:\/\/www.portalam9.com.br\/?p=4097","title":{"rendered":"Buscas por cometa sobem ap\u00f3s comportamento incomum do 3I\/ATLAS"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\"><em>Tempo de leitura: 2 minutos<\/em><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">O<strong>\u00a0cometa &#8220;visitante&#8221; 3I\/ATLAS\u00a0<\/strong>vem ganhando destaque na m\u00eddia nas \u00faltimas semanas por seu comportamento incomum. Al\u00e9m de chamar aten\u00e7\u00e3o dos cientistas, o corpo celeste tem sido alvo de especula\u00e7\u00f5es e at\u00e9 de teorias envolvendo alien\u00edgenas.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">A curiosidade sobre este objeto vindo de fora do nosso Sistema Solar tem causado, inclusive, um\u00a0<strong>aumento nas buscas sobre &#8220;cometa&#8221; no Google nos \u00faltimos dias<\/strong>, segundo dados do Google Trends.<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/admin.cnnbrasil.com.br\/wp-content\/uploads\/sites\/12\/2025\/10\/cometa-google-trends.png?w=849&amp;h=477&amp;crop=0\" alt=\"Buscas no Google por &quot;cometa&quot; crescem ao longo dos \u00faltimos 3 meses no Brasil \u2022 Google Trends\"\/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Buscas no Google por &#8220;cometa&#8221; crescem ao longo dos \u00faltimos 3 meses no Brasil \u2022 Google Trends<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Comportamento incomum do cometa 3I\/ATLAS<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">O 3I\/ATLAS\u00a0foi detectado em\u00a01\u00ba de julho de 2025 pelo telesc\u00f3pio ATLAS (Asteroid Terrestrial-impact Last Alert Survey System), localizado em R\u00edo Hurtado, no Chile.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Ele \u00e9 apenas o terceiro corpo celeste de fora do nosso Sistema Solar j\u00e1 registrado passando por nossa vizinhan\u00e7a c\u00f3smica. Por isso se sabe t\u00e3o pouco sobre ele e sobre suas origens.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Segundo a Nasa, n\u00e3o \u00e9 preciso se preocupar, pois o cometa n\u00e3o representa nenhuma amea\u00e7a \u00e0 Terra e permanecer\u00e1 distante. O mais pr\u00f3ximo que ele chegar\u00e1 do nosso planeta \u00e9 cerca de 1,8 unidades astron\u00f4micas (cerca de 270 milh\u00f5es de quil\u00f4metros).<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Composi\u00e7\u00e3o qu\u00edmica<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Um estudo baseado em observa\u00e7\u00f5es do\u00a0Telesc\u00f3pio Espacial James Webb\u00a0(JWST) revelou alguns detalhes incomuns sobre o 3I\/ATLAS, como uma coma (a nuvem de g\u00e1s e poeira ao redor do n\u00facleo do cometa) dominada por di\u00f3xido de carbono (CO\u2082). Esta \u00e9 uma\u00a0<strong>concentra\u00e7\u00e3o jamais vista em cometas<\/strong>.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Al\u00e9m disso, o&nbsp;3I\/ATLAS cont\u00e9m aproximadamente oito vezes mais di\u00f3xido de carbono do que \u00e1gua, o que ultrapassa em mais de seis vezes o limite de varia\u00e7\u00e3o esperado.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Como o objeto est\u00e1 viajando a uma velocidade acima de 210 mil km\/h, os pesquisadores est\u00e3o em uma verdadeira corrida contra o tempo para extrair o m\u00e1ximo de informa\u00e7\u00f5es sobre a composi\u00e7\u00e3o qu\u00edmica.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Al\u00e9m de confirmar a proced\u00eancia extrassolar do 3I\/ATLAS, o JWST estimou que o cometa possui um n\u00facleo s\u00f3lido entre 320 metros e 5,6 quil\u00f4metros de di\u00e2metro, com uma atividade de emiss\u00e3o de \u00e1gua (OH) detectada a dist\u00e2ncias superiores a tr\u00eas unidades astron\u00f4micas do Sol (450 milh\u00f5es de km).<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Cometa mais antigo j\u00e1 visto<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">O 3I\/ATLAS pode ser o cometa mais antigo j\u00e1 observado at\u00e9 hoje. Segundo um modelo computacional desenvolvido pela equipe que o descobriu, o visitante espacial teria mais de sete bilh\u00f5es de anos, ou seja, mais velho que o Sistema Solar.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><em>Fonte: CNN Brasil <strong>\/<\/strong> Foto: Nasa<\/em><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Tempo de leitura: 2 minutos O\u00a0cometa &#8220;visitante&#8221; 3I\/ATLAS\u00a0vem ganhando destaque na m\u00eddia nas \u00faltimas semanas<\/p>\n","protected":false},"author":3,"featured_media":4098,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[4],"tags":[],"class_list":["post-4097","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-curiosidades-2"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.8 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Buscas por cometa sobem ap\u00f3s comportamento incomum do 3I\/ATLAS - 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