{"id":47698,"date":"2026-03-07T13:07:38","date_gmt":"2026-03-07T13:07:38","guid":{"rendered":"http:\/\/69a849b8d06cb98bafed72ba"},"modified":"2026-03-07T13:07:38","modified_gmt":"2026-03-07T13:07:38","slug":"si-existen-las-senales-extraterrestres-serian-casi-imposibles-de-detectar-segun-este-estudio","status":"publish","type":"post","link":"https:\/\/sarmiento24h.com\/?p=47698","title":{"rendered":"Si existen, las se\u00f1ales extraterrestres ser\u00edan casi imposibles de detectar, seg\u00fan este estudio"},"content":{"rendered":"<div><img decoding=\"async\" src=\"https:\/\/sarmiento24h.com\/wp-content\/uploads\/2026\/03\/si-existen-las-senales-extraterrestres-serian-casi-imposibles-de-detectar-segun-este-estudio.jpg\" class=\"ff-og-image-inserted\"><\/div>\n<p>Hablamos de civilizaciones extraterrestres, o m\u00e1s bien de formas de vida extraterrestre. No tenemos se\u00f1ales de su existencia, pero, para los entendidos, eso no significa que debamos tirar la toalla. Incluso no haber visto nada significa algo, o m\u00e1s bien, en palabras del f\u00edsico italiano Claudio Grimaldi, la propia \u00abausencia de se\u00f1ales no es simplemente &#8216;nada&#8217;. Esta ausencia de detecciones es informativa \u00ab, explica a Wired, \u00abno prueba que no existan civilizaciones extraterrestres, pero nos permite establecer un l\u00edmite a la frecuencia con la que posibles civilizaciones tecnol\u00f3gicas lanzan al espacio se\u00f1ales detectables. Y nos orienta para averiguar d\u00f3nde y c\u00f3mo realizar las pr\u00f3ximas observaciones.<\/p>\n<h2>Civilizaciones extraterrestres: un nuevo estudio para explicar la ausencia de se\u00f1ales<\/h2>\n<p>Grimaldi aborda esta cuesti\u00f3n en las p\u00e1ginas de un <a data-offer-url=\"https:\/\/iopscience.iop.org\/article\/10.3847\/1538-3881\/ae394b#artAbst\" class=\"external-link\" data-event-click=\"{&quot;element&quot;:&quot;ExternalLink&quot;,&quot;outgoingURL&quot;:&quot;https:\/\/iopscience.iop.org\/article\/10.3847\/1538-3881\/ae394b#artAbst&quot;}\" href=\"https:\/\/iopscience.iop.org\/article\/10.3847\/1538-3881\/ae394b#artAbst\" rel=\"nofollow noopener\" target=\"_blank\">nuevo trabajo<\/a> que ha publicado en <em>The Astronomical Journal<\/em>. Nos hab\u00edamos separado del cient\u00edfico del Laboratorio de Biof\u00edsica Estad\u00edstica de la \u00c9cole Polytechnique F\u00e9d\u00e9rale de Lausanne (EPFL), en Suiza, y del Centro de Investigaci\u00f3n Enrico Fermi (CREF) de Roma en 2023 a ra\u00edz de la publicaci\u00f3n de un trabajo que trataba de explicar por qu\u00e9 no hab\u00edamos interceptado (y seguimos sin hacerlo) se\u00f1ales de formas de vida extraterrestre (en las que tambi\u00e9n se involucra el uso de inteligencia artificial). \u00abLa ausencia de detecci\u00f3n puede explicarse de dos maneras \u00ab, explica hoy, \u00abo bien la Tierra nunca ha sido alcanzada por ninguna se\u00f1al, y esta es la hip\u00f3tesis que explor\u00e9 en el estudio 2023, o bien las se\u00f1ales llegaron, pero fuimos incapaces de interceptarlas\u00bb. El nuevo estudio explora precisamente esta segunda posibilidad: juntos, los dos trabajos exploran ambas explicaciones plausibles de la ausencia de detecci\u00f3n, complement\u00e1ndose mutuamente\u00bb.<\/p>\n<h2>\u00bfSe\u00f1ales de civilizaciones alien\u00edgenas perdidas?<\/h2>\n<p>Antes de profundizar en los resultados del nuevo trabajo del f\u00edsico te\u00f3rico, repasemos brevemente el anterior. En aquel estudio, Grimaldi explicaba la ausencia de se\u00f1ales (o m\u00e1s bien tecnofirmas, es decir, emisiones electromagn\u00e9ticas artificiales en el espectro de radio, microondas, infrarrojos y \u00f3ptico, nos recuerda) admitiendo esencialmente que nuestra ventana espacial y temporal de observaci\u00f3n era demasiado estrecha. Podr\u00edamos tardar hasta miles de a\u00f1os en verlas, en el mejor de los casos unas pocas d\u00e9cadas, incluso suponiendo intensas y extensas actividades de investigaci\u00f3n que podr\u00edan ampliar el espacio de observaci\u00f3n, <a data-offer-url=\"https:\/\/iopscience.iop.org\/article\/10.3847\/1538-3881\/acc327#ajacc327s4\" class=\"external-link\" data-event-click=\"{&quot;element&quot;:&quot;ExternalLink&quot;,&quot;outgoingURL&quot;:&quot;https:\/\/iopscience.iop.org\/article\/10.3847\/1538-3881\/acc327#ajacc327s4&quot;}\" href=\"https:\/\/iopscience.iop.org\/article\/10.3847\/1538-3881\/acc327#ajacc327s4\" rel=\"nofollow noopener\" target=\"_blank\">escribi\u00f3<\/a> entonces el f\u00edsico.<\/p>\n<p>Ahora, Grimaldi <a data-offer-url=\"https:\/\/actu.epfl.ch\/news\/if-alien-signals-reached-earth-why-haven-t-we-seen\/\" class=\"external-link\" data-event-click=\"{&quot;element&quot;:&quot;ExternalLink&quot;,&quot;outgoingURL&quot;:&quot;https:\/\/actu.epfl.ch\/news\/if-alien-signals-reached-earth-why-haven-t-we-seen\/&quot;}\" href=\"https:\/\/actu.epfl.ch\/news\/if-alien-signals-reached-earth-why-haven-t-we-seen\/\" rel=\"nofollow noopener\" target=\"_blank\">intenta explicar<\/a> por qu\u00e9, en cambio, si estas se\u00f1ales han llegado, no las hemos captado. Un hecho m\u00e1s que plausible, nos dice: \u00abLa galaxia es inmensa. A pesar de d\u00e9cadas de investigaci\u00f3n, solo hemos explorado una fracci\u00f3n del espacio posible: pocas direcciones, pocas frecuencias, durante tiempos limitados. Por tanto, es plausible que, durante estos sesenta a\u00f1os, la Tierra haya sido atravesada por se\u00f1ales que no hemos podido detectar, porque eran demasiado d\u00e9biles, se transmit\u00edan en frecuencias diferentes de las observadas o, simplemente, porque no mir\u00e1bamos en la direcci\u00f3n correcta\u00bb.<\/p>\n<p>En el nuevo estudio, Grimaldi parti\u00f3 precisamente de esta hip\u00f3tesis, la de la existencia de se\u00f1ales no captadas en nuestra galaxia. \u00abConstru\u00ed un modelo estad\u00edstico que estima cu\u00e1ntas se\u00f1ales no detectadas ser\u00edan necesarias, en los \u00faltimos sesenta a\u00f1os, para tener hoy una probabilidad significativa de detecci\u00f3n con los radiotelescopios actuales\u00bb. La ventana de sesenta a\u00f1os equivale aproximadamente al tiempo transcurrido desde el primer experimento de b\u00fasqueda de vida extraterrestre inteligente. Grimaldi consider\u00f3 emisores en la medida de lo posible civilizaciones extraterrestres y sus artefactos, y se\u00f1ales de duraci\u00f3n variable, desde unos pocos d\u00edas a miles de a\u00f1os, con o sin una direcci\u00f3n precisa, <a data-offer-url=\"https:\/\/actu.epfl.ch\/news\/if-alien-signals-reached-earth-why-haven-t-we-seen\/\" class=\"external-link\" data-event-click=\"{&quot;element&quot;:&quot;ExternalLink&quot;,&quot;outgoingURL&quot;:&quot;https:\/\/actu.epfl.ch\/news\/if-alien-signals-reached-earth-why-haven-t-we-seen\/&quot;}\" href=\"https:\/\/actu.epfl.ch\/news\/if-alien-signals-reached-earth-why-haven-t-we-seen\/\" rel=\"nofollow noopener\" target=\"_blank\">explica<\/a> una nota del EPFL. \u00abEste enfoque permite construir escenarios basados en datos (en este caso, precisamente en la ausencia de detecciones) y evaluar cuantitativamente su plausibilidad\u00bb.<\/p>\n<h2>B\u00fasqueda de civilizaciones extraterrestres: nuevas esperanzas<\/h2>\n<p>Seg\u00fan las estimaciones del cient\u00edfico, no tenemos ninguna probabilidad significativa de ver nada. \u00abPara tener una buena oportunidad hoy en d\u00eda, la Tierra tendr\u00eda que haber sido atravesada por un enorme n\u00famero de se\u00f1ales en el pasado. Un n\u00famero tan grande que incluso supera el n\u00famero de planetas extrasolares en nuestra regi\u00f3n gal\u00e1ctica\u00bb, explica Grimaldi. Para hacernos una idea concreta: para tener una probabilidad significativa de detectar una se\u00f1al a menos de 500 a\u00f1os luz de la Tierra, habr\u00eda sido necesario que al menos una se\u00f1al cada dos d\u00edas hubiera pasado por nuestro planeta en los \u00faltimos sesenta a\u00f1os, sin que nos di\u00e9ramos cuenta. Tal hip\u00f3tesis parece bastante inveros\u00edmil. Para que la hip\u00f3tesis fuera m\u00e1s realista, ser\u00eda necesario ampliar la b\u00fasqueda a distancias de varios miles de a\u00f1os luz\u00bb. Estas hip\u00f3tesis m\u00e1s realistas, seg\u00fan el art\u00edculo, son las que admiten tasas de contacto m\u00e1s bajas.<\/p>\n<p>Seg\u00fan el f\u00edsico, el hecho de no haber encontrado todav\u00eda ninguna se\u00f1al confirma que se trata de un dato muy esclarecedor. &#8216;Si estas se\u00f1ales existen, deben ser mucho m\u00e1s raras y proceder de distancias mucho mayores de lo que a menudo imaginamos&#8217;, concluye, \u2018una nueva generaci\u00f3n de telescopios de mayor rendimiento podr\u00eda permitirnos por fin detectarlas\u2019. En este sentido, Grimaldi reconoce c\u00f3mo, efectivamente, en los \u00faltimos tiempos se han puesto en marcha iniciativas y proyectos bastante prometedores para la b\u00fasqueda de civilizaciones extraterrestres, como el Breakthrough Listen, el Next Generation Very Large Array y el Square Kilometre Array (SKA).<\/p>\n<p><em>Art\u00edculo originalmente publicado en<\/em> <a href=\"https:\/\/www.wired.it\/article\/anche-assenza-segnali-extraterrestri-informazione-importante-quando-parliamo-di-civilta-aliene-claudio-grimaldi\/\">WIRED Italia<\/a>. <em>Adaptado por Mauricio Serfatty Godoy.<\/em><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Hablamos de civilizaciones extraterrestres, o m\u00e1s bien&#46;&#46;&#46;<\/p>\n","protected":false},"author":1,"featured_media":47699,"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-47698","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-tecnologia"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.3 - 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