{"id":25572,"date":"2012-01-04T17:42:38","date_gmt":"2012-01-04T16:42:38","guid":{"rendered":"http:\/\/www.astb.se\/cassiopeiabloggen\/?p=25572"},"modified":"2012-01-04T22:00:33","modified_gmt":"2012-01-04T21:00:33","slug":"nr-4-2012","status":"publish","type":"post","link":"https:\/\/www.astb.se\/cassiopeiabloggen\/2012\/01\/04\/nr-4-2012\/","title":{"rendered":"Nr 4 2012"},"content":{"rendered":"<h2>N&auml;rbild av Omeganebulosan<\/h2>\n<p class=\"text_intro pr_first\">Ibland kan vi inte se skogen f&ouml;r alla tr&auml;d &#8211; jag &auml;r lite os&auml;ker p&aring; <a href=\"http:\/\/www.eso.org\/public\/sweden\/news\/eso1201\/\">var exakt i M 17 som dagens ESO-bild &auml;r f&aring;ngad.<\/a> Med hj&auml;lp av&nbsp; ESO:s j&auml;tteteleskop VLT tr&auml;nger vi s&aring; l&aring;ngt in i nebulosan att vi nu kan vi se de stoftfyllda, rosaf&auml;rgade <span style=\"text-decoration: underline;\">centrala<\/span> delarna av Omeganebulosan &#8211; en av Vintergatans s&aring; kallade stj&auml;rnbarnkammare fylld av gasmoln, stoft och nyf&ouml;dda stj&auml;rnor.<\/p>\n<p class=\"text_intro pr_first\">En bra gajd till bilden &auml;r de b&auml;gge&nbsp; m&ouml;rkare &quot;kols&auml;ckarna&quot; t h &#8211; kolla med denna notis understa bild, VST-vidvinkelbilden, s&aring; tror jag vi &auml;r hemma i den kosmiska geografin.<\/p>\n<p class=\"text_intro pr_first\"><a href=\"https:\/\/www.astb.se\/cassiopeiabloggen\/wp-content\/uploads\/2012\/01\/eso1201a.jpg\"><img decoding=\"async\" alt=\"\" class=\"aligncenter size-medium wp-image-25583\" height=\"122\" src=\"https:\/\/www.astb.se\/cassiopeiabloggen\/wp-content\/uploads\/2012\/01\/eso1201a-300x122.jpg\" title=\"Foto: ESO\/VLT\" width=\"300\" srcset=\"https:\/\/www.astb.se\/cassiopeiabloggen\/wp-content\/uploads\/2012\/01\/eso1201a-300x122.jpg 300w, https:\/\/www.astb.se\/cassiopeiabloggen\/wp-content\/uploads\/2012\/01\/eso1201a.jpg 733w\" sizes=\"(max-width: 300px) 100vw, 300px\" \/><\/a><\/p>\n<p><strong>\u25ba Nebulosan &auml;r bel&auml;gen<\/strong> 6500 ljus&aring;r bort i stj&auml;rnbilden Skytten och &auml;r ett popul&auml;rt observationsm&aring;l f&ouml;r astronomer, den upplysta gasen med omgivande stoft &auml;r en av de yngsta och mest aktiva omr&aring;dena&nbsp; f&ouml;r skapandet av unga, massiva stj&auml;rnor..<\/p>\n<p><strong>\u25ba Bilden &auml;r en av de f&ouml;rsta<\/strong> som har producerats som en del av ESO:s program Cosmic Gems (&quot;Kosmiska p&auml;rlor&quot;) som syftar till att producera astronomiska bilder f&ouml;r undervisning och f&ouml;r att v&auml;cka allm&auml;nhetens intresse. I detta program anv&auml;nds observationstid som annars g&aring;tt till spillo eftersom v&auml;derf&ouml;rh&aring;llandena ansetts vara f&ouml;r d&aring;liga f&ouml;r vetenskapliga observationer. Ist&auml;llet tar man bilder p&aring; intressanta, sp&auml;nnande eller visuellt tilltalande objekt. Data g&ouml;rs &auml;ven tillg&auml;ngligt f&ouml;r professionella.<\/p>\n<p><a href=\"https:\/\/www.astb.se\/cassiopeiabloggen\/wp-content\/uploads\/2012\/01\/eso1201a-1.jpg\"><img decoding=\"async\" alt=\"\" class=\"aligncenter size-full wp-image-25584\" height=\"330\" src=\"https:\/\/www.astb.se\/cassiopeiabloggen\/wp-content\/uploads\/2012\/01\/eso1201a-1.jpg\" title=\"Omeganebulositeten i en n\u00e5got annolrunda vinkel. Foto: ESO\/VLT\" width=\"320\" srcset=\"https:\/\/www.astb.se\/cassiopeiabloggen\/wp-content\/uploads\/2012\/01\/eso1201a-1.jpg 320w, https:\/\/www.astb.se\/cassiopeiabloggen\/wp-content\/uploads\/2012\/01\/eso1201a-1-290x300.jpg 290w\" sizes=\"(max-width: 320px) 100vw, 320px\" \/><\/a><\/p>\n<p>Studiet av M17 har en l&aring;ng historia. <strong>William Herschel <\/strong>trodde p&aring; 1780-talet f&ouml;rst att den gick att uppl&ouml;sa i enskilda, mycket avl&auml;gsna&nbsp; stj&auml;rnor, men den tesen &ouml;vergav han och ins&aring;g att M17 var en riktigt nebulosa best&aring;ende av en &quot;luminious fluid&quot; eller &quot;interstellar aether&quot;, som m&ouml;jligtvis kom att kontraktera och bilda en stj&auml;rnhop.<\/p>\n<p><strong>John Herschel<\/strong>, sonen,&nbsp; s&aring;g nebulosan s&aring; h&auml;r 1837 fr&aring;n Sydafrika, och vi f&ouml;rst&aring;r varifr&aring;n tillnamnet H&auml;stskonebulosan kommer:<\/p>\n<p><a href=\"https:\/\/www.astb.se\/cassiopeiabloggen\/wp-content\/uploads\/2012\/01\/730px-TPSMV8P285_Fig_2.jpg\"><img decoding=\"async\" alt=\"\" class=\"aligncenter size-medium wp-image-25585\" height=\"246\" src=\"https:\/\/www.astb.se\/cassiopeiabloggen\/wp-content\/uploads\/2012\/01\/730px-TPSMV8P285_Fig_2-300x246.jpg\" width=\"300\" srcset=\"https:\/\/www.astb.se\/cassiopeiabloggen\/wp-content\/uploads\/2012\/01\/730px-TPSMV8P285_Fig_2-300x246.jpg 300w, https:\/\/www.astb.se\/cassiopeiabloggen\/wp-content\/uploads\/2012\/01\/730px-TPSMV8P285_Fig_2.jpg 730w\" sizes=\"(max-width: 300px) 100vw, 300px\" \/><\/a><\/p>\n<p>J&auml;mf&ouml;r Herschels teckning med astrofotot fr&aring;n Lick-observatoriet 1899 (fotograf <strong>James E Keeler)<\/strong> och vi f&ouml;rst&aring;r en annan sak: Om vi st&aring;r p&aring; huvudet s&aring; begriper vi samtidigt varf&ouml;r nebulosan kallas Svanen-nebulosan! K&auml;rt barn etc etc.<\/p>\n<p><a href=\"https:\/\/www.astb.se\/cassiopeiabloggen\/wp-content\/uploads\/2012\/01\/M17_Omega_small.gif\"><img decoding=\"async\" alt=\"\" class=\"aligncenter size-full wp-image-25589\" height=\"180\" src=\"https:\/\/www.astb.se\/cassiopeiabloggen\/wp-content\/uploads\/2012\/01\/M17_Omega_small.gif\" width=\"150\" \/><\/a><\/p>\n<p>ESO:s vidvinkliga VST-instrument tog h&auml;rom &aring;ret denna bild:<\/p>\n<p><a href=\"https:\/\/www.astb.se\/cassiopeiabloggen\/wp-content\/uploads\/2012\/01\/eso1119a1.jpg\"><img decoding=\"async\" alt=\"\" class=\"aligncenter size-full wp-image-25595\" height=\"320\" src=\"https:\/\/www.astb.se\/cassiopeiabloggen\/wp-content\/uploads\/2012\/01\/eso1119a1.jpg\" title=\"Foto: ESO\/VST\" width=\"320\" srcset=\"https:\/\/www.astb.se\/cassiopeiabloggen\/wp-content\/uploads\/2012\/01\/eso1119a1.jpg 320w, https:\/\/www.astb.se\/cassiopeiabloggen\/wp-content\/uploads\/2012\/01\/eso1119a1-150x150.jpg 150w, https:\/\/www.astb.se\/cassiopeiabloggen\/wp-content\/uploads\/2012\/01\/eso1119a1-300x300.jpg 300w\" sizes=\"(max-width: 320px) 100vw, 320px\" \/><\/a><\/p>\n<h2>En fr&auml;sig Kvadrantrid<\/h2>\n<p>Denna snygga Kvadrantid med r&ouml;ksp&aring;r fotograferades i morse av den engelske amat&ouml;rastronomen <strong>Pete Lawrence<\/strong>, Selsey. Hans bild finns p&aring; <a href=\"http:\/\/spaceweather.com\/submissions\/large_image_popup.php?image_name=Pete-Lawrence-C_M_IMG_5828_seq1_1325686878.jpg\">www.spaceweather.com liksom m&aring;nga andra f&ouml;rn&auml;mliga bilde<\/a>r:<\/p>\n<p><a href=\"https:\/\/www.astb.se\/cassiopeiabloggen\/wp-content\/uploads\/2012\/01\/Pete-Lawrence-C_M_IMG_5828_anim_1325686878.gif\"><img decoding=\"async\" alt=\"\" class=\"aligncenter size-full wp-image-25618\" height=\"480\" src=\"https:\/\/www.astb.se\/cassiopeiabloggen\/wp-content\/uploads\/2012\/01\/Pete-Lawrence-C_M_IMG_5828_anim_1325686878.gif\" title=\"Foto: Pete Lawrence\" width=\"374\" srcset=\"https:\/\/www.astb.se\/cassiopeiabloggen\/wp-content\/uploads\/2012\/01\/Pete-Lawrence-C_M_IMG_5828_anim_1325686878.gif 374w, https:\/\/www.astb.se\/cassiopeiabloggen\/wp-content\/uploads\/2012\/01\/Pete-Lawrence-C_M_IMG_5828_anim_1325686878-233x300.gif 233w\" sizes=\"(max-width: 374px) 100vw, 374px\" \/><\/a><\/p>\n<h2>N&auml;r pensioneras teleskop?<\/h2>\n<p>Ett tag trodde vi v&auml;l alla att tiden runnit ut f&ouml;r alla de gamla klassiska teleskopbj&auml;ssarna, inte minst f&ouml;r dem borta i USA. Men med den adaptiva teknikens hj&auml;lp har de startats upp igen p&ouml; om p&ouml;.<\/p>\n<p>\u25ba <strong>Hooker-teleskopet p&aring; Mount Wilson<\/strong> l&aring;g i malp&aring;se 1986-1994 men har v&auml;ckts ur slummern igen.<\/p>\n<p>\u25ba <strong>&Auml;ven Yerkes-observatoriets 40-tumsrefraktor<\/strong> i Chicago &#8211; v&auml;rldens st&ouml;rsta &#8211;&nbsp; har&nbsp; dammats av, och forskarna synar bl a gamla stj&auml;rnhopars egenr&ouml;relser. P&aring; Yerkes finns &ouml;ver 100 &aring;r gamla pl&aring;tar att j&auml;mf&ouml;ra med! P&aring; observatoriet &auml;r arkiverat n&auml;stan 200 000 fotografiska direktpl&aring;tar och spektra.<\/p>\n<p>Viket f&aring;r mig att undra: Vad h&auml;nder med alla de svenska teleskopen? T ex Schmidten p&aring; Kvistaberg?<\/p>\n<h2>Hon g&ouml;r mig matt!<\/h2>\n<p>Jag blir helt matt n&auml;r jag l&auml;ser vad Harvard-professorn, partikelfysikern <strong>Lisa Randall <\/strong>gjort och h&aring;ller p&aring; med.<\/p>\n<p><a href=\"https:\/\/www.astb.se\/cassiopeiabloggen\/wp-content\/uploads\/2012\/01\/Randall1.large_.jpg\"><img decoding=\"async\" width=\"150\" height=\"150\" alt=\"\" class=\"alignleft size-thumbnail wp-image-25603\" src=\"https:\/\/www.astb.se\/cassiopeiabloggen\/wp-content\/uploads\/2012\/01\/Randall1.large_-150x150.jpg\" style=\"width: 105px; height: 105px;\" \/><\/a><a href=\"http:\/\/randall.physics.harvard.edu\/CV.html\">Hennes CV kan m&auml;tas i ljus&aring;r,<\/a> och nyligen &#8211; 1 januari &#8211; intervjuades hon p&aring; CNN om vad som fattas i USA:s grundforskning just nu och vad hon trodde om liv p&aring; andra planeter. Randall &auml;r&nbsp; ovanligt skeptisk till v&aring;ra m&ouml;jligheter att hitta liv samtidigt som hon inte utesluter att det verkligen finns livsformer d&auml;r ute. En sund skepticism, tycker jag.<\/p>\n<p>Lisa Randall&nbsp; &auml;r ett av kosmologins affischnamn i dag och det f&ouml;rv&aring;nar bara att hon aldrig synts till p&aring; Kunskapskanalen eller p&aring; de svenska bokhandelsdiskarna. Skadan kan s&auml;kert tas igen.<\/p>\n<p>Lisa Randall &auml;r ofta med p&aring; listor &ouml;ver &quot;V&auml;rldens 100 mest inflytelserika personer&quot;.<\/p>\n<p>Randalls senaste bok heter <em>Knocking on Heavens Door.<\/em><\/p>\n<p><a href=\"https:\/\/www.astb.se\/cassiopeiabloggen\/wp-content\/uploads\/2012\/01\/knockingonheavensdoorlisarandall.jpg\"><img decoding=\"async\" alt=\"\" class=\"aligncenter size-medium wp-image-25602\" height=\"300\" src=\"https:\/\/www.astb.se\/cassiopeiabloggen\/wp-content\/uploads\/2012\/01\/knockingonheavensdoorlisarandall-226x300.jpg\" width=\"226\" srcset=\"https:\/\/www.astb.se\/cassiopeiabloggen\/wp-content\/uploads\/2012\/01\/knockingonheavensdoorlisarandall-226x300.jpg 226w, https:\/\/www.astb.se\/cassiopeiabloggen\/wp-content\/uploads\/2012\/01\/knockingonheavensdoorlisarandall.jpg 302w\" sizes=\"(max-width: 226px) 100vw, 226px\" \/><\/a><\/p>\n<p>Och s&aring; har hon skrivit en opera och &auml;r inte ett dugg r&auml;dd f&ouml;r att &ouml;verbrygga de tv&aring; kulturerna.<\/p>\n<h2>En lurig bild<\/h2>\n<p>Fr&aring;n NASA:s Cassinisond ramlade h&auml;rom dan in Saturnusm&aring;narna Titan (den mindre m&aring;nen) och Dione p&aring; samma bild, i n&aring;got som s&auml;gs vara n&aring;gerlunda r&auml;ttvisa f&auml;rger.<\/p>\n<p>Men:<br \/>\n\tBilden ljuger!<\/p>\n<p>Titan &auml;r betydligt st&ouml;rre &auml;n Dione, 5150 km tv&auml;rs&ouml;ver vs 1123 km. M&aring;narna ligger f&ouml;rst&aring;s p&aring; helt olika avst&aring;nd, Titan &auml;r n&auml;stan tio ggr l&auml;ngre bort fr&aring;n Cassini-sonden&nbsp; &auml;n Dione.<\/p>\n<h2><a href=\"https:\/\/www.astb.se\/cassiopeiabloggen\/wp-content\/uploads\/2012\/01\/612885main_pia14912-43_946-710.jpg\"><img decoding=\"async\" alt=\"\" class=\"aligncenter size-medium wp-image-25607\" height=\"225\" src=\"https:\/\/www.astb.se\/cassiopeiabloggen\/wp-content\/uploads\/2012\/01\/612885main_pia14912-43_946-710-300x225.jpg\" title=\"Foto: NASA\/JPL-Caltech\/Space Science Institute\" width=\"300\" srcset=\"https:\/\/www.astb.se\/cassiopeiabloggen\/wp-content\/uploads\/2012\/01\/612885main_pia14912-43_946-710-300x225.jpg 300w, https:\/\/www.astb.se\/cassiopeiabloggen\/wp-content\/uploads\/2012\/01\/612885main_pia14912-43_946-710.jpg 946w\" sizes=\"(max-width: 300px) 100vw, 300px\" \/><\/a><\/h2>\n<h2>Nu g&ouml;r vi en konstpaus (igen)<\/h2>\n<p><a href=\"https:\/\/www.astb.se\/cassiopeiabloggen\/wp-content\/uploads\/2012\/01\/181109_pause_refreshes_1.jpg\"><img decoding=\"async\" alt=\"\" class=\"aligncenter size-thumbnail wp-image-25612\" height=\"150\" src=\"https:\/\/www.astb.se\/cassiopeiabloggen\/wp-content\/uploads\/2012\/01\/181109_pause_refreshes_1-150x150.jpg\" width=\"150\" \/><\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>N&auml;rbild av Omeganebulosan Ibland kan vi inte se skogen f&ouml;r alla tr&auml;d &#8211; jag &auml;r lite os&auml;ker p&aring; var exakt i M 17 som dagens ESO-bild &auml;r f&aring;ngad. Med hj&auml;lp av&nbsp; ESO:s j&auml;tteteleskop VLT tr&auml;nger vi s&aring; l&aring;ngt in i nebulosan att vi nu kan vi se de stoftfyllda, rosaf&auml;rgade centrala delarna av Omeganebulosan &#8211;&hellip;&nbsp;<a href=\"https:\/\/www.astb.se\/cassiopeiabloggen\/2012\/01\/04\/nr-4-2012\/\" rel=\"bookmark\">L\u00e4s mer &raquo;<span class=\"screen-reader-text\">Nr 4 2012<\/span><\/a><\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"rop_custom_images_group":[],"rop_custom_messages_group":[],"rop_publish_now":"initial","rop_publish_now_accounts":[],"rop_publish_now_history":[],"rop_publish_now_status":"pending","neve_meta_sidebar":"","neve_meta_container":"","neve_meta_enable_content_width":"","neve_meta_content_width":0,"neve_meta_title_alignment":"","neve_meta_author_avatar":"","neve_post_elements_order":"","neve_meta_disable_header":"","neve_meta_disable_footer":"","neve_meta_disable_title":"","footnotes":""},"categories":[3],"tags":[],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 4.9.9 - aioseo.com -->\n\t<meta name=\"description\" content=\"N\u00e4rbild av Omeganebulosan Ibland kan vi inte se skogen f\u00f6r alla tr\u00e4d - jag \u00e4r lite os\u00e4ker p\u00e5 var exakt i M 17 som dagens ESO-bild \u00e4r f\u00e5ngad. Med hj\u00e4lp av ESO:s j\u00e4tteteleskop VLT tr\u00e4nger vi s\u00e5 l\u00e5ngt in i nebulosan att vi nu kan vi se de stoftfyllda, rosaf\u00e4rgade centrala delarna av Omeganebulosan -\" \/>\n\t<meta name=\"robots\" content=\"max-image-preview:large\" \/>\n\t<meta name=\"author\" content=\"ulfr\"\/>\n\t<link rel=\"canonical\" href=\"https:\/\/www.astb.se\/cassiopeiabloggen\/2012\/01\/04\/nr-4-2012\/\" \/>\n\t<meta name=\"generator\" content=\"All in One SEO (AIOSEO) 4.9.9\" \/>\n\t\t<meta property=\"og:locale\" content=\"sv_SE\" \/>\n\t\t<meta property=\"og:site_name\" content=\"Cassiopeiabloggen - Astronomiska S\u00e4llskapet Tycho Brahes blogg\" \/>\n\t\t<meta property=\"og:type\" content=\"article\" \/>\n\t\t<meta property=\"og:title\" content=\"Nr 4 2012 - Cassiopeiabloggen\" \/>\n\t\t<meta property=\"og:description\" content=\"N\u00e4rbild av Omeganebulosan Ibland kan vi inte se skogen f\u00f6r alla tr\u00e4d - jag \u00e4r lite os\u00e4ker p\u00e5 var exakt i M 17 som dagens ESO-bild \u00e4r f\u00e5ngad. 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