{"id":2352,"date":"2010-08-31T17:03:15","date_gmt":"2010-08-31T20:03:15","guid":{"rendered":"https:\/\/www.gluon.com.br\/blog\/?p=2352"},"modified":"2015-01-17T15:57:23","modified_gmt":"2015-01-17T15:57:23","slug":"areia-e-galaxias","status":"publish","type":"post","link":"https:\/\/www.gluon.com.br\/blog\/2010\/08\/31\/areia-e-galaxias\/","title":{"rendered":"Areia e gal\u00e1xias"},"content":{"rendered":"<p>Se voc\u00ea segurar no alto um gr\u00e3o de areia, o peda\u00e7o de c\u00e9u que ele cobrir\u00e1 cont\u00e9m 10.000 gal\u00e1xias.<br \/>\nSaiba mais sobre isso em<br \/>\n<em><a href=\"http:\/\/www.physics.org\/\">http:\/\/www.physics.org\/<\/a><\/em><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/www.gluon.com.br\/blog\/wp-content\/uploads\/2010\/08\/areia-fisica-universo-gr.jpg\" alt=\"poster para promo\u00e7\u00e3o da f\u00edsica e astronomia\" width=\"650\" height=\"958\" class=\"alignnone size-full wp-image-5328\" \/><br \/>\nSer\u00e1 que \u00e9 verdade?<br \/>\nO site nos informa que um gr\u00e3o de areia pode ser bem pequeno, mas o peda\u00e7o de c\u00e9u que ele cobre quando voc\u00ea estende o bra\u00e7o, ter\u00e1 muitos anos-luz de di\u00e2metro, devido \u00e0s gigantescas dist\u00e2ncias na astronomia.E gra\u00e7as a observa\u00e7\u00f5es realizadas com telesc\u00f3pios, como o Hubble, \u00e9 poss\u00edvel estimar que existem mais de uma centena de bilh\u00e3o de gal\u00e1xias no Universo &#8211; e estas s\u00e3o s\u00f3 as que podemos ver. Ent\u00e3o podemos estimar que existe uma gigantesca quantidade de gal\u00e1xias naquela \u00e1rea coberta pelo gr\u00e3o de areia.<\/p>\n<p>E cada gal\u00e1xia pode conter algo entre 10 milh\u00f5es at\u00e9 centenas de bilh\u00f5es de estrelas.<\/p>\n<p>A tradicional frase \u00b4<em>Existem mais estrelas no Universo do que gr\u00e3os de areia em todas as praias da Terra<\/em>\u00b4, dita por Carl Sagan, \u00e9 de c\u00e1lculo dif\u00edcil, com conclus\u00f5es imprecisas do tamanho dos gr\u00e3os de areia, e da quantidade de areia em todas as praias do mundo. No final das contas talvez a frase fa\u00e7a sentido.<\/p>\n<p><iframe loading=\"lazy\" width=\"640\" height=\"480\" src=\"\/\/www.youtube.com\/embed\/sJ_tZr0D2pk\" frameborder=\"0\" allowfullscreen><\/iframe><\/p>\n<p>Via <a href=\"http:\/\/physicsphysics.tumblr.com\/post\/1022162745\">Gravity.It\u00b4s the law<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Se voc\u00ea segurar no alto um gr\u00e3o de areia, o peda\u00e7o de c\u00e9u que ele cobrir\u00e1 cont\u00e9m 10.000 gal\u00e1xias. Saiba mais sobre isso em http:\/\/www.physics.org\/ Ser\u00e1 que \u00e9 verdade? O site nos informa que um gr\u00e3o de areia pode ser bem pequeno, mas o peda\u00e7o de c\u00e9u que ele cobre quando voc\u00ea estende o bra\u00e7o, ter\u00e1 muitos anos-luz de di\u00e2metro, devido \u00e0s gigantescas dist\u00e2ncias na astronomia.E gra\u00e7as a observa\u00e7\u00f5es realizadas com telesc\u00f3pios, como o Hubble, \u00e9 poss\u00edvel estimar que existem mais de uma centena de bilh\u00e3o de gal\u00e1xias no Universo &#8211; e estas s\u00e3o s\u00f3 as que podemos ver. Ent\u00e3o <\/p>\n","protected":false},"author":1,"featured_media":5328,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[5],"tags":[],"class_list":["post-2352","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-astronomia","has_thumb"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 5.0.0.1 - aioseo.com -->\n\t<meta name=\"description\" content=\"Se voc\u00ea segurar no alto um gr\u00e3o de areia, o peda\u00e7o de c\u00e9u que ele cobrir\u00e1 cont\u00e9m 10.000 gal\u00e1xias. Saiba mais sobre isso em http:\/\/www.physics.org\/ Ser\u00e1 que \u00e9 verdade? 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