{"id":131706,"date":"2010-02-05T08:16:16","date_gmt":"2010-02-05T07:16:16","guid":{"rendered":"http:\/\/www.madrimasd.org\/blogs\/astrofisica\/?p=131706"},"modified":"2010-02-05T08:16:16","modified_gmt":"2010-02-05T07:16:16","slug":"energia-oscura","status":"publish","type":"post","link":"https:\/\/www.madrimasd.org\/blogs\/astrofisica\/2010\/02\/05\/131706","title":{"rendered":"ENERG\u00cdA OSCURA"},"content":{"rendered":"<p>Cuando Albert Einstein elabor\u00f3 su modelo de universo, en 1915, Edwin Hubble a\u00fan no hab\u00eda realizado las observaciones que demostraban que el cosmos estaba en expansi\u00f3n. Einstein cre\u00eda que el universo era est\u00e1tico, de modo que introdujo en sus ecuaciones de la relatividad general un t\u00e9rmino de expansi\u00f3n, llamado constante cosmol\u00f3gica, cuyo efecto era compensar la acci\u00f3n de la gravitaci\u00f3n causada por toda la masa del universo.<\/p>\n<p>A\u00f1os despu\u00e9s, cuando Hubble prob\u00f3 que el universo estaba expandi\u00e9ndose, Einstein consider\u00f3 la constante cosmol\u00f3gica como una de sus mayores equivocaciones. En 1998, los cosm\u00f3logos, utilizando el brillo de supernovas que explotaron hace cientos de millones de a\u00f1os en galaxias muy distantes, pudieron demostrar que la expansi\u00f3n del universo se est\u00e1 acelerando: el cosmos parece estar dominado por un tipo de energ\u00eda de origen desconocido, la llamada energ\u00eda oscura, cuyo efecto es equivalente al de una antigravedad que existe a escalas mucho mayores, un tipo de efecto an\u00e1logo al de la constante cosmol\u00f3gica introducida por Einstein.<\/p>\n<p>Observaciones recientes sugieren que cerca del 95% de la energ\u00eda del universo est\u00e1 en el sector \u00aboscuro\u00bb. Este sector est\u00e1 constituido por materia oscura (una forma de materia no luminosa) y energ\u00eda oscura, cuyo origen y composici\u00f3n son desconocidos. La energ\u00eda oscura constituye alrededor del 73% del universo y es responsable de una misteriosa fuerza repulsiva que parece estar acelerando la expansi\u00f3n del cosmos.<\/p>\n<hr size=\"1\" \/><a href=\"https:\/\/www.madrimasd.org\/blogs\/astrofisica\/category\/glosario\" target=\"blank\"><br \/>\n<strong>Glosario: 100 conceptos b\u00e1sicos de Astronom\u00eda\u00bb <\/strong><\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Cuando Albert Einstein elabor\u00f3 su modelo de universo, en 1915, Edwin Hubble a\u00fan no hab\u00eda realizado las observaciones que demostraban que el cosmos estaba en expansi\u00f3n. Einstein cre\u00eda que el universo era est\u00e1tico, de modo que introdujo en sus ecuaciones de la relatividad general un t\u00e9rmino de expansi\u00f3n, llamado constante cosmol\u00f3gica, cuyo efecto era compensar la acci\u00f3n de la gravitaci\u00f3n causada por toda la masa del universo. A\u00f1os despu\u00e9s, cuando Hubble prob\u00f3 que el universo estaba expandi\u00e9ndose, Einstein consider\u00f3 la constante cosmol\u00f3gica como una de sus mayores equivocaciones. En 1998, los cosm\u00f3logos, utilizando el brillo de supernovas que explotaron hace\u2026<\/p>\n","protected":false},"author":142,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"ngg_post_thumbnail":0},"categories":[560,760],"tags":[],"blocksy_meta":{"styles_descriptor":{"styles":{"desktop":"","tablet":"","mobile":""},"google_fonts":[],"version":4}},"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 4.9.9 - aioseo.com -->\n\t<meta name=\"description\" content=\"Cuando Albert Einstein elabor\u00f3 su modelo de universo, en 1915, Edwin Hubble a\u00fan no hab\u00eda realizado las observaciones que demostraban que el cosmos estaba en expansi\u00f3n. Einstein cre\u00eda que el universo era est\u00e1tico, de modo que introdujo en sus ecuaciones de la relatividad general un t\u00e9rmino de expansi\u00f3n, llamado constante cosmol\u00f3gica, cuyo efecto era compensar\" \/>\n\t<meta name=\"robots\" content=\"max-image-preview:large\" \/>\n\t<meta name=\"author\" content=\"glosario\"\/>\n\t<link rel=\"canonical\" href=\"https:\/\/www.madrimasd.org\/blogs\/astrofisica\/2010\/02\/05\/131706\" \/>\n\t<meta name=\"generator\" content=\"All in One SEO (AIOSEO) 4.9.9\" \/>\n\t\t<meta property=\"og:locale\" content=\"es_ES\" \/>\n\t\t<meta property=\"og:site_name\" content=\"Cuaderno de bit\u00e1cora estelar - Astrof\u00edsica, astronom\u00eda, cosmolog\u00eda, ciencias del espacio\" \/>\n\t\t<meta property=\"og:type\" content=\"article\" \/>\n\t\t<meta property=\"og:title\" content=\"ENERG\u00cdA OSCURA - Cuaderno de bit\u00e1cora estelar\" \/>\n\t\t<meta property=\"og:description\" content=\"Cuando Albert Einstein elabor\u00f3 su modelo de universo, en 1915, Edwin Hubble a\u00fan no hab\u00eda realizado las observaciones que demostraban que el cosmos estaba en expansi\u00f3n. Einstein cre\u00eda que el universo era est\u00e1tico, de modo que introdujo en sus ecuaciones de la relatividad general un t\u00e9rmino de expansi\u00f3n, llamado constante cosmol\u00f3gica, cuyo efecto era compensar\" \/>\n\t\t<meta property=\"og:url\" content=\"https:\/\/www.madrimasd.org\/blogs\/astrofisica\/2010\/02\/05\/131706\" \/>\n\t\t<meta property=\"og:image\" content=\"https:\/\/www.madrimasd.org\/blogs\/astrofisica\/files\/2022\/02\/logo.png\" \/>\n\t\t<meta property=\"og:image:secure_url\" content=\"https:\/\/www.madrimasd.org\/blogs\/astrofisica\/files\/2022\/02\/logo.png\" \/>\n\t\t<meta property=\"article:published_time\" content=\"2010-02-05T07:16:16+00:00\" \/>\n\t\t<meta property=\"article:modified_time\" content=\"2010-02-05T07:16:16+00:00\" \/>\n\t\t<meta name=\"twitter:card\" content=\"summary\" \/>\n\t\t<meta name=\"twitter:title\" content=\"ENERG\u00cdA OSCURA - Cuaderno de bit\u00e1cora estelar\" \/>\n\t\t<meta name=\"twitter:description\" content=\"Cuando Albert Einstein elabor\u00f3 su modelo de universo, en 1915, Edwin Hubble a\u00fan no hab\u00eda realizado las observaciones que demostraban que el cosmos estaba en expansi\u00f3n. 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