{"id":2792,"date":"2012-05-18T22:00:51","date_gmt":"2012-05-19T01:00:51","guid":{"rendered":"http:\/\/scienceblogs.com.br\/hypercubic\/?p=2792"},"modified":"2012-05-18T22:00:51","modified_gmt":"2012-05-19T01:00:51","slug":"saturno-troll","status":"publish","type":"post","link":"https:\/\/www.blogs.unicamp.br\/hypercubic\/2012\/05\/saturno-troll\/","title":{"rendered":"Saturno Troll"},"content":{"rendered":"

\"saturno-troll\"<\/a><\/span><\/p>\n

\n

Na noite de 25 de abril de 1889, por volta das 8:30, eu estava examinando Saturno com uma pot\u00eancia de cerca de 180 em um [telesc\u00f3pio] Brashear acrom\u00e1tico de 4 polegadas e 1\/8, quando, para minha grande surpresa, percebi que a sombra do globo sobre os an\u00e9is estava curvada de maneira errada, i.e., partindo do globo, como mostra o desenho. Pensando que meus olhos estivessem enganados, chamei minha esposa e, sem contar-lhe o que vi, pedi-lhe que me descrevesse a forma da sombra. Ela a descreveu como tendo sua extremidade direita curvada para fora do planeta.\"saturno-sombra\"<\/a><\/span><\/p>\n

Escrevi sobre isso ao Professor Comstock, do Washburn Observatory e ele me informou que, embora seja incomum, minha observa\u00e7\u00e3o de Saturno estava longe de ser in\u00e9dita. A mesma apar\u00eancia fora observada em 1875 com um acrom\u00e1tico de 26 polegadas em Washington. [James] Webb, em \u201cCelestial Objects for Common Telescopes\u201d [Objetos Celestes para Telesc\u00f3pios Comuns] diz: \u201cA borda dessa sombra tem sido frequentemente encontrada curvada da maneira errada por sua perspectiva\u201d. O Prof. Comstock ainda acrescenta: \u201cQue eu saiba, nenhuma explica\u00e7\u00e3o satisfat\u00f3ria foi dada a essa anomalia\u201d. \u2014 Aldro Jenks, \u201cOn the Reversed Curvature of the Shadow on Saturn\u2019s Rings,\u201d [\u201cDa Curvatura Reversa da Sombra nos An\u00e9is de Saturno\u201d], Sidereal Messenger, 9:255, Junho de 1890<\/span><\/p>\n<\/blockquote>\n

H\u00e1 relatos similares em observa\u00e7\u00f5es feitas entre 1886 e 1914. Ainda assim, qual seria o motivo? Todos os telesc\u00f3pios daquele per\u00edodo n\u00e3o podem estar com defeito… Seria uma ilus\u00e3o\u00a0 de \u00f3tica causada por algum alinhamento incomum entre o Sol, a Terra e Saturno?<\/p>\n","protected":false},"excerpt":{"rendered":"

Na noite de 25 de abril de 1889, por volta das 8:30, eu estava examinando Saturno com uma pot\u00eancia de cerca de 180 em um [telesc\u00f3pio] Brashear acrom\u00e1tico de 4 polegadas e 1\/8, quando, para minha grande surpresa, percebi que a sombra do globo sobre os an\u00e9is estava curvada de maneira errada, i.e., partindo do […]<\/p>\n","protected":false},"author":486,"featured_media":2796,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_eb_attr":"","_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"material-hide-sections":[],"pgc_sgb_lightbox_settings":"","_vp_format_video_url":"","_vp_image_focal_point":[],"footnotes":""},"categories":[25,79,220,318],"tags":[],"class_list":["post-2792","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-astronomia","category-curiosidades","category-misterio","category-trollagem"],"yoast_head":"\nSaturno Troll - 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