{"id":92655,"date":"2018-03-29T14:58:46","date_gmt":"2018-03-29T14:58:46","guid":{"rendered":"http:\/\/candas365.es\/noticias\/?p=92655"},"modified":"2018-03-29T14:58:46","modified_gmt":"2018-03-29T14:58:46","slug":"la-extrana-galaxia-sin-materia-oscura","status":"publish","type":"post","link":"https:\/\/candas365.es\/noticias\/la-extrana-galaxia-sin-materia-oscura\/","title":{"rendered":"La extra\u00f1a galaxia sin materia oscura"},"content":{"rendered":"<p><img fetchpriority=\"high\" decoding=\"async\" class=\"alignleft size-medium wp-image-92656\" src=\"https:\/\/candas365.es\/noticias\/wp-content\/uploads\/2018\/03\/La-extrana-galaxia-sin-materia-oscura_image_380-360x239.jpg\" alt=\"\" width=\"360\" height=\"239\" srcset=\"https:\/\/candas365.es\/noticias\/wp-content\/uploads\/2018\/03\/La-extrana-galaxia-sin-materia-oscura_image_380-360x239.jpg 360w, https:\/\/candas365.es\/noticias\/wp-content\/uploads\/2018\/03\/La-extrana-galaxia-sin-materia-oscura_image_380.jpg 573w\" sizes=\"(max-width: 360px) 100vw, 360px\" \/>Aunque todav\u00eda no se ha podido detectar, la materia oscura constituye alrededor del 27% del universo y sus efectos se dejan notar en el movimiento de las galaxias. Sin embargo, investigadores de la Universidad de Yale (EE UU) han comprobado que en al menos una galaxia, denominada NGC1052-DF2, no aparece ni rastro de materia oscura, solo la masa de sus c\u00famulos de estrellas.<\/p>\n<p>Investigadores de EE UU y Canad\u00e1 han encontrado una lejana galaxia que, de forma inesperada, no contiene materia oscura, ese misterioso material cuya masa parece tener efectos gravitatorios sobre la materia visible, como las estrellas y las galaxias, afectando a sus movimientos por el universo.<\/p>\n<blockquote><p><strong><em>Los movimientos de diez c\u00famulos de estrellas de NGC1052-DF2 indican que esta galaxia no tiene materia oscura<\/em><\/strong><\/p><\/blockquote>\n<p>De hecho, los cient\u00edficos piensan que el 27 % del universo es materia oscura, siendo la materia ordinaria, la que vemos, tan solo el 5%. El 68 % restante corresponder\u00eda a la tambi\u00e9n enigm\u00e1tica energ\u00eda oscura.<\/p>\n<p>En la mayor\u00eda de las galaxias, la materia oscura es el tipo predominante de materia. En galaxias como la V\u00eda L\u00e1ctea, normalmente hay alrededor de 30 veces m\u00e1s materia oscura que materia \u2018normal\u2019 (la que se calcula con la masa de sus estrellas). Curiosamente, esta proporci\u00f3n de materia oscura aumenta tanto en galaxias mayores como en las menores a la nuestra. Por ejemplo, las galaxias enanas tienen 400 veces m\u00e1s materia oscura.<\/p>\n<p>En este contexto, el equipo liderado por el profesor Pieter van Dokkum de la Universidad de Yale ha analizado la galaxia NGC1052-DF2 (situada cerca de NGC 1052 en la constelaci\u00f3n de Cetus, a unos 63 millones de a\u00f1os luz) y ha descubierto que carece de materia oscura.<\/p>\n<p><strong>Masa solo de estrellas<\/strong><\/p>\n<p>\u201cBas\u00e1ndonos en los movimientos de diez c\u00famulos de brillantes estrellas que se encuentran dentro de ella, hemos encontrado que la masa de NGC1052-DF2 es esencialmente la misma que la masa aparente de las estrellas visibles\u201d, se\u00f1alan los autores, que destacan: \u201cEste hallazgo sugiere que esta galaxia, a diferencia de otras, no parece tener ninguna materia oscura en absoluto\u201d.<\/p>\n<p>Parad\u00f3jicamente, seg\u00fan los cient\u00edficos, el hecho de descubrir galaxias como NGC1052-DF2 puede ayudar a descartar algunas de las teor\u00edas cosmol\u00f3gicas que se han propuesto como alternativas a la materia oscura, incluidas las que consideran que habr\u00eda que modificar las leyes de Newton para explicar el movimiento de las galaxias.<\/p>\n<p>SINC<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Aunque todav\u00eda no se ha podido detectar, la materia oscura constituye alrededor del 27% del universo y sus efectos se dejan notar en el movimiento de las galaxias. Sin embargo, investigadores de la Universidad de Yale (EE UU) han comprobado que en al menos una galaxia, denominada NGC1052-DF2, no aparece ni rastro de materia oscura,<\/p>\n","protected":false},"author":1,"featured_media":92656,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[143],"tags":[],"class_list":{"0":"post-92655","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-sociedad"},"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO Pro 4.9.5.2 - aioseo.com -->\n\t<meta name=\"description\" content=\"Aunque todav\u00eda no se ha podido detectar, la materia oscura constituye alrededor del 27% del universo y sus efectos se dejan notar en el movimiento de las galaxias. 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