{"id":273136,"date":"2026-06-08T23:28:18","date_gmt":"2026-06-08T23:28:18","guid":{"rendered":"http:\/\/6a2726c0175106cf45258ba5"},"modified":"2026-06-08T23:28:18","modified_gmt":"2026-06-08T23:28:18","slug":"un-fragmento-de-un-supuesto-planeta-perdido-del-sistema-solar-aparece-en-el-desierto-del-sahara","status":"publish","type":"post","link":"https:\/\/sarmiento24h.com\/?p=273136","title":{"rendered":"Un fragmento de un supuesto planeta perdido del sistema solar aparece en el desierto del Sahara"},"content":{"rendered":"

Cient\u00edficos encontraron un extra\u00f1o meteorito en el desierto del Sahara tan antiguo como el sistema solar. Tras analizarlo, el equipo detr\u00e1s del hallazgo concluy\u00f3 que podr\u00eda ser uno de los pocos restos supervivientes de un protoplaneta que habr\u00eda desaparecido hace 4,500 millones de a\u00f1os.<\/p>\n

De acuerdo con el art\u00edculo publicado en la revista Earth and Planetary Science Letters<\/em><\/a>, el meteorito pudo originarse en un cuerpo de, al menos, 1,000 kil\u00f3metros de radio. Esa escala lo coloca por encima de cualquier asteroide conocido y en un rango comparable al de un planeta enano como Plut\u00f3n. Los autores incluso plantean que pudo alcanzar dimensiones similares a las de la Luna.<\/p>\n

\n
\"Una<\/picture><\/span><\/div>\n
<\/p>\n

Una porci\u00f3n cortada del asteroide NWA 12774.<\/p>\n

<\/span>John Kashuba\/Universidad de Colorado Boulder<\/em><\/span><\/div>\n<\/figure>\n

El meteorito, llamado NWA 12774, apareci\u00f3 en 2019 en el desierto m\u00e1s famoso de \u00c1frica<\/a> y lleg\u00f3 a manos de los cient\u00edficos a trav\u00e9s de un comerciante local. Lo que parec\u00eda una roca oscura de medio kilo con peque\u00f1os cristales verdes en su interior pronto result\u00f3 ser una angrita, una rar\u00edsima familia de rocas espaciales. Para ponerlo en perspectiva, de los casi 80,000 meteoritos catalogados apenas unas 68 muestras pertenecen a esta categor\u00eda.<\/p>\n

El inter\u00e9s de las angritas radica en que son rocas volc\u00e1nicas. Su composici\u00f3n revela que alguna vez fueron magma fundido, una se\u00f1al de que se originaron en cuerpos que experimentaron una evoluci\u00f3n geol\u00f3gica compleja. En contraste, la mayor\u00eda de los meteoritos<\/a> son simples mezclas de polvo y metales.<\/p>\n

Sin embargo, NWA 12774 posee una caracter\u00edstica poco com\u00fan incluso entre las angritas. En su interior conserva cristales de clinopiroxeno excepcionalmente ricos en aluminio y notablemente bien preservados. Estos minerales, comunes en la corteza y el manto de la Tierra, funcionan como c\u00e1psulas del tiempo geol\u00f3gicas porque registran las condiciones f\u00edsicas bajo las cuales se form\u00f3 el magma que les dio origen.<\/p>\n

\n
\"Los<\/picture><\/span><\/div>\n
<\/p>\n

Los diferentes minerales del meteorito vistos por filtros polarizadores.<\/p>\n

<\/span>John Kashuba\/Universidad de Colorado Boulder<\/em><\/span><\/div>\n<\/figure>\n

No hay forma de que el meteorito pertenezca a un cuerpo peque\u00f1o<\/h2>\n

Para determinar el tama\u00f1o del cuerpo de origen, los cient\u00edficos necesitaban calcular la presi\u00f3n bajo la cual se formaron los cristales presentes en el meteorito. Para lograrlo, desarrollaron un geobar\u00f3metro que revel\u00f3 que estas estructuras se cristalizaron bajo presiones cercanas a los 17.6 kilobares.<\/p>\n

Como referencia, un kilobar equivale aproximadamente a la presi\u00f3n que existe en el fondo de la fosa de las Marianas, el punto m\u00e1s profundo de los oc\u00e9anos de la Tierra. Los cristales de NWA 12774 se formaron bajo casi 18 veces esa presi\u00f3n.<\/p>\n

En otras palabras, ning\u00fan asteroide podr\u00eda generar la presi\u00f3n interna necesaria para producir el clinopiroxeno que muestra el meteorito. La \u00fanica explicaci\u00f3n plausible es que provenga de un cuerpo con un radio m\u00ednimo de 1,000 kil\u00f3metros. Adem\u00e1s, algunas caracter\u00edsticas de los cristales sugieren que el protoplaneta original pudo haber superado los 1,800 kil\u00f3metros de radio.<\/p>\n","protected":false},"excerpt":{"rendered":"

Cient\u00edficos encontraron un extra\u00f1o meteorito en el...<\/p>\n","protected":false},"author":1,"featured_media":273137,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_publicize_message":"","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":true,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"font":"","enabled":false},"version":2}},"categories":[46],"tags":[],"class_list":["post-273136","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-tecnologia"],"yoast_head":"\nUn fragmento de un supuesto planeta perdido del sistema solar aparece en el desierto del Sahara - Sarmiento24h<\/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:\/\/sarmiento24h.com\/?p=273136\" \/>\n<meta property=\"og:locale\" content=\"es_ES\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Un fragmento de un supuesto planeta perdido del sistema solar aparece en el desierto del Sahara - 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