{"id":385248,"date":"2026-08-18T21:17:54","date_gmt":"2026-08-18T21:17:54","guid":{"rendered":"http:\/\/6a848caee47cc4567f85b4b0"},"modified":"2026-08-18T21:17:54","modified_gmt":"2026-08-18T21:17:54","slug":"la-via-lactea-esta-hecha-a-partir-de-colisiones-titanicas-y-acabamos-de-descubrir-la-mas-antigua","status":"publish","type":"post","link":"https:\/\/sarmiento24h.com\/?p=385248","title":{"rendered":"La V\u00eda L\u00e1ctea est\u00e1 hecha a partir de colisiones tit\u00e1nicas y acabamos de descubrir la m\u00e1s antigua"},"content":{"rendered":"<p>El telescopio Hubble acaba de acceder al pasaje m\u00e1s antiguo conocido en la historia de la V\u00eda L\u00e1ctea. Un equipo de astr\u00f3nomos identific\u00f3 un conjunto de estrellas que form\u00f3 parte de una gran galaxia que se fusion\u00f3 con la proto-V\u00eda L\u00e1ctea hace unos 12,000 millones de a\u00f1os. Es evidencia de la gran fusi\u00f3n m\u00e1s antigua identificada hasta ahora. La cronolog\u00eda conocida de las grandes fusiones de nuestra galaxia se ha ampliado 1,800 millones de a\u00f1os, hasta una \u00e9poca en la que hab\u00edan transcurrido menos de 2,000 millones de a\u00f1os desde el Big Bang.<\/p>\n<h2>Reordenando el \u00e1rbol geneal\u00f3gico de la V\u00eda L\u00e1ctea<\/h2>\n<p>El modelo actual de evoluci\u00f3n de galaxias sostiene que estas crecen de manera jer\u00e1rquica. Es decir, las primeras estructuras gal\u00e1cticas eran relativamente peque\u00f1as y, con el paso del tiempo, algunas crecieron hasta formar nuevas estrellas y fusionarse <a href=\"https:\/\/es.wired.com\/articulos\/la-fusion-entre-la-via-lactea-y-andromeda-podria-no-ocurrir-despues-de-todo\">con otros sistemas<\/a>. La V\u00eda L\u00e1ctea es producto de ese proceso. Durante miles de millones de a\u00f1os incorpor\u00f3 otras galaxias, cuyas estrellas y dem\u00e1s componentes pasaron a formar parte de un sistema cada vez m\u00e1s grande y complejo.<\/p>\n<p>Esos bloques de antiguas galaxias est\u00e1n por todos lados. El problema es que hay demasiados a nuestro alrededor y, entre m\u00e1s atr\u00e1s veamos, m\u00e1s d\u00edficil resulta distinguir su origen. Los cient\u00edficos llevan d\u00e9cadas clasificando las estrellas cercanas para determinar cu\u00e1les pertenecieron a otras galaxias y cu\u00e1ndo ocurri\u00f3 su fusi\u00f3n. El registro m\u00e1s antiguo de una colisi\u00f3n hasta ahora databa de hace 10,000 millones de a\u00f1os, cuando la proto-V\u00eda L\u00e1ctea absorbi\u00f3 a la galaxia <a href=\"https:\/\/es.wired.com\/articulos\/la-via-lactea-tiene-dos-tipos-de-estrellas-aunque-nadie-sabe-exactamente-por-que-este-modelo-propone-una-explicacion\">Gaia-Sausage-Enceladus<\/a> (GSE).<\/p>\n<p>Hab\u00eda indicios de colisiones todav\u00eda m\u00e1s antiguas, pero su interpretaci\u00f3n segu\u00eda siendo objeto de debate. Ahora, en palabras de la NASA, han identificado el primer lote significativo de ladrillos de nuestra casa. Gracias al Hubble, hay pruebas definitivas de otra fusi\u00f3n que ocurri\u00f3 1,800 millones de a\u00f1os antes de la gran colisi\u00f3n con GSE.<\/p>\n<hr>\n<div class=\"ContentCardEmbedWrapper-hkvhYu kMYDit content-card-embed content-card-embed--stacked\" data-testid=\"ContentCardEmbedWrapper\" readability=\"18.404494382022\">\n<div class=\"ContentCardEmbedImage-bqahne fjmzkP content-card-embed__image\" data-testid=\"ContentCardEmbedImage\"><span class=\"SpanWrapper-kFnjvc eKnjjD responsive-asset\"><picture class=\"ResponsiveImagePicture-jKunQM gjCCFj responsive-image\"><img decoding=\"async\" alt=\"La mayor parte de la formaci\u00f3n estelar de nuestra galaxia tiene lugar a menos de 40,000 a\u00f1os luz del centro. \" loading=\"lazy\" class=\"ResponsiveImageContainer-dkeESL cQPiWi responsive-image__image\" srcset=\"https:\/\/media.es.wired.com\/photos\/69f230e5f3ec65faf83f191b\/master\/w_120,c_limit\/481229372 120w, https:\/\/media.es.wired.com\/photos\/69f230e5f3ec65faf83f191b\/master\/w_240,c_limit\/481229372 240w, https:\/\/media.es.wired.com\/photos\/69f230e5f3ec65faf83f191b\/master\/w_320,c_limit\/481229372 320w, https:\/\/media.es.wired.com\/photos\/69f230e5f3ec65faf83f191b\/master\/w_640,c_limit\/481229372 640w, https:\/\/media.es.wired.com\/photos\/69f230e5f3ec65faf83f191b\/master\/w_768,c_limit\/481229372 768w\" sizes=\"100vw\" src=\"https:\/\/media.es.wired.com\/photos\/69f230e5f3ec65faf83f191b\/master\/w_775%2Cc_limit\/481229372\"><\/picture><\/span><\/div>\n<div class=\"ContentCardEmbedInfo-buyHWH gWLOee\" readability=\"19.280898876404\">\n<div class=\"BaseText-fEwdHD ContentCardEmbedHed-kDKGDs iUENtL dlHXUJ content-card-embed__hed\" data-testid=\"ContentCardEmbedHed\"><a class=\"BaseLink-haTOKm ContentCardEmbedHedLink-iBZsco ILkR hhUFQU content-card-embed__hed-link link\" href=\"https:\/\/es.wired.com\/articulos\/la-via-lactea-si-tiene-un-borde-y-esta-mas-cerca-de-lo-que-creiamos\" data-testid=\"ContentCardEmbedHedLink\">La V\u00eda L\u00e1ctea s\u00ed tiene un borde, y est\u00e1 m\u00e1s cerca de lo que cre\u00edamos<\/a><\/div>\n<p>Un equipo de astr\u00f3nomos ha logrado definir el borde del disco de formaci\u00f3n estelar de nuestra galaxia.<\/p>\n<\/div>\n<\/div>\n<hr>\n<h2>Dile hola a la antigua galaxia LKH<\/h2>\n<p>La galaxia reci\u00e9n identificada ya hab\u00eda dejado algunas pistas. Durante a\u00f1os, los astr\u00f3nomos detectaron en el centro de la V\u00eda L\u00e1ctea tres poblaciones de estrellas y c\u00famulos que parec\u00edan provenir de antiguas fusiones. Las llamaron Low-energy, Kraken y Heracles. No estaba claro si ten\u00edan un origen com\u00fan o si todas hab\u00edan llegado desde otras galaxias, pero un nuevo estudio afirma que son rastros de un mismo sistema al que han nombrado Low-energy-Kraken-Heracles (LKH).<\/p>\n<p>\u201cGracias a la alta resoluci\u00f3n y profundidad de las im\u00e1genes del Hubble, pudimos medir la edad y el contenido met\u00e1lico de estos c\u00famulos con una precisi\u00f3n sin precedentes. Junto con las <a href=\"https:\/\/es.wired.com\/articulos\/el-telescopio-gaia-de-la-esa-nos-muestra-la-forma-ondulada-de-la-via-lactea-como-nunca-antes\">mediciones de Gaia<\/a>, esto permiti\u00f3 distinguir una poblaci\u00f3n de c\u00famulos globulares diferentes a los dem\u00e1s. Estos son los c\u00famulos que nacieron en LKH, y nos indican cu\u00e1ndo esa galaxia fue engullida por la nuestra y cu\u00e1l era su masa\u201d, dijo Chiara Zerbinati, coautora del estudio, en un <a href=\"https:\/\/science.nasa.gov\/missions\/hubble\/hubble-solves-merger-mystery-from-milky-ways-early-years\/\">comunicado de la NASA<\/a>.<\/p>\n<p>El calculo estima que LKH conten\u00eda alrededor de 500 millones de masas solares en estrellas, una cantidad similar a Gaia-Sausage-Enceladus, y que buena parte de su material termin\u00f3 en las regiones interiores de la V\u00eda L\u00e1ctea.<\/p>\n<p>LKH se encontr\u00f3 con nuestra galaxia en una \u00e9poca muy distinta. La V\u00eda L\u00e1ctea todav\u00eda era joven y mucho m\u00e1s peque\u00f1a, por lo que aquella fusi\u00f3n debi\u00f3 tener un peso considerable en su evoluci\u00f3n. Los autores estiman que la masa de LKH equival\u00eda a m\u00e1s de una quinta parte de la del sistema con el que se fusion\u00f3.<\/p>\n<p>Es bastante probable que existan colisiones m\u00e1s antiguas. Los cient\u00edficos continuar\u00e1n empleando las herramientas disponibles para ahondar m\u00e1s en la historia no contada de la V\u00eda L\u00e1ctea.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>El telescopio Hubble acaba de acceder al&#46;&#46;&#46;<\/p>\n","protected":false},"author":1,"featured_media":385249,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_feature_clip_id":0,"_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},"jetpack_post_was_ever_published":false},"categories":[46],"tags":[],"class_list":["post-385248","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-tecnologia"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.1 - 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