{"id":26360,"date":"2012-01-20T17:51:57","date_gmt":"2012-01-20T16:51:57","guid":{"rendered":"http:\/\/www.astb.se\/cassiopeiabloggen\/?p=26360"},"modified":"2012-01-20T23:45:40","modified_gmt":"2012-01-20T22:45:40","slug":"nr-19-2012","status":"publish","type":"post","link":"https:\/\/www.astb.se\/cassiopeiabloggen\/2012\/01\/20\/nr-19-2012\/","title":{"rendered":"Nr 19 2012"},"content":{"rendered":"<h2>Nestorn Runes M42 &#8211; f&ouml;re och efter<\/h2>\n<p>I julas hade jag anledning att &aring;terge v&auml;nnen <strong>Rune Fogelquists<\/strong> suver&auml;na foto av Orionnebulosan, M 42 (<a href=\"https:\/\/www.astb.se\/cassiopeiabloggen\/?p=25127\">W-bloggen nr 321 2011<\/a>).<\/p>\n<p>N&auml;r Rune tog den bilden? N&aring;n g&aring;ng i slutet av 80-talet. Desto s&auml;krare &auml;r att han fotade med sin 38 cm reflektor, br&auml;nnvidd 2,5 meter.<br \/>\n\tRune har g&aring;tt vidare med bilden och jobbat lite med den&nbsp; i m&ouml;rkrummet.<\/p>\n<p>&#8211; N&auml;mligen med&nbsp; &quot;oskarp mask&quot;&nbsp; och sen har jag fortsatt med behandling i Photoshop. Avsikten<br \/>\n\toch resultatet blev att det avsl&ouml;jades vad som finns dolt i den&nbsp; &ouml;verexponerade centrala delen av nebulosan &#8211; som synes r&auml;tt mycket detaljer,<br \/>\n\t&#8211; Bildskalan &auml;r inte s&aring; stor. De fyra&nbsp; stj&auml;rnorna i Trapetset syns som en enda liten fl&auml;ck.<\/p>\n<p><a href=\"https:\/\/www.astb.se\/cassiopeiabloggen\/wp-content\/uploads\/2012\/01\/Orinebs-inre2.jpg\"><img decoding=\"async\" alt=\"\" class=\"aligncenter size-large wp-image-26369\" height=\"556\" src=\"https:\/\/www.astb.se\/cassiopeiabloggen\/wp-content\/uploads\/2012\/01\/Orinebs-inre2-828x1024.jpg\" title=\"Orineb's inre(2)\" width=\"450\" srcset=\"https:\/\/www.astb.se\/cassiopeiabloggen\/wp-content\/uploads\/2012\/01\/Orinebs-inre2-828x1024.jpg 828w, https:\/\/www.astb.se\/cassiopeiabloggen\/wp-content\/uploads\/2012\/01\/Orinebs-inre2-242x300.jpg 242w, https:\/\/www.astb.se\/cassiopeiabloggen\/wp-content\/uploads\/2012\/01\/Orinebs-inre2.jpg 1181w\" sizes=\"(max-width: 450px) 100vw, 450px\" \/><\/a><\/p>\n<p>M 42 &auml;r ju en stj&auml;rnkrubba av s&auml;llan sk&aring;dat slag och ett av de genom &aring;ren mest fotograferade himlaobjekten. Men &auml;ven optiskt som i kv&auml;ll (20.1.2012 kl 19 cirka LT) i centrala Malm&ouml; erbjuder hela omr&aring;det en fantastisk syn &#8211; jag spanade in nebulosan med en vanlig f&auml;ltkikare 12 x 50 och fascinerades som alltid av nebulosans&nbsp; storlek och konstruktion n&auml;r man vet hur den ser ut. Plus insikten om att jag ser saker b&auml;ttre h&auml;r fr&aring;n min balkong mitt i smeten &auml;n vad 1600\/1700-talets astronomer gjorde.<\/p>\n<p>Nu har det b&ouml;rjat sn&ouml;a&#8230;<\/p>\n<h2>London-OS vs Halleys komet<\/h2>\n<p>En av mina friidrottsfavoriter <strong>Sebastian Coe<\/strong>, Lord Coe i dag, har i sin egenskap av h&ouml;gste pamp f&ouml;r kommande London-OS dragit in Halleys komet i sammanhanget:<\/p>\n<p>&#8211; I think people will realise they&#39;re in a very special year. It&#39;s a bit like Halley&#39;s comet, it doesn&#39;t come around that often and everything is in alignment, sa han f&ouml;r en tid sen.<\/p>\n<h2>Icke-Nobelpristagare skapade &quot;svarta h&aring;l&quot;-begreppet<\/h2>\n<p>Begreppet <span style=\"text-decoration: underline;\">Big Bang<\/span> b&ouml;rjade som en sorts sk&auml;llsord av <strong>Fred Hoyle<\/strong>, och aprop&aring; <strong>Crafoord<\/strong>-priset till <span style=\"text-decoration: underline;\">svarta h&aring;l<\/span>-utforskarna av Vintergatan (se f&ouml;rra W-bloggen), s&aring; tycker jag det &auml;r r&auml;tt kul att kolla upp varifr&aring;n uttrycket egentligen kommer.<\/p>\n<p><a href=\"https:\/\/www.astb.se\/cassiopeiabloggen\/wp-content\/uploads\/2012\/01\/0-393-31991-1.jpg\"><img decoding=\"async\" width=\"201\" height=\"300\" alt=\"\" class=\"alignleft size-medium wp-image-26363\" src=\"https:\/\/www.astb.se\/cassiopeiabloggen\/wp-content\/uploads\/2012\/01\/0-393-31991-1-201x300.jpg\" style=\"width: 134px; height: 199px;\" srcset=\"https:\/\/www.astb.se\/cassiopeiabloggen\/wp-content\/uploads\/2012\/01\/0-393-31991-1-201x300.jpg 201w, https:\/\/www.astb.se\/cassiopeiabloggen\/wp-content\/uploads\/2012\/01\/0-393-31991-1.jpg 300w\" sizes=\"(max-width: 201px) 100vw, 201px\" \/><\/a> Atombombens fader <strong>J Robert Oppenheimer <\/strong>var en av de teoretiska pionj&auml;rerna 1939 tillsammans med en elev i en avhandling med titeln <em>On Continued Gravitational Contraction<\/em>, men &quot;Oppie&quot; anv&auml;nde aldrig sj&auml;lv uttrycket &quot;svarta h&aring;l&quot; som s&aring;dant.<\/p>\n<p>En av dem som mest entydigt anses ha myntat beskrivningen var <strong>John A Wheeler,<\/strong> fysikern och&nbsp; <strong>Niels Bohr<\/strong>-kollegan. Wheeler var l&auml;nge skeptisk till Oppenheimers och andras id&eacute;er om den st&auml;ndiga kontraktionen under neutronstj&auml;rnornas sf&auml;r men gav efter p&ouml; om p&ouml;. P&aring; en vetenskapskonferens 1967 i New York var det n&aring;n h&ouml;gljudd person i publiken som fick honom att pl&ouml;tsligt t&auml;nda till och b&ouml;rja prata om &quot;black hole&quot; &#8211; och sen rullade det bara p&aring;.<\/p>\n<p>I en j&auml;mf&ouml;relse talade Wheeler en g&aring;ng om att svarta h&aring;l var som att skrynkla ihop ett stycke papper till mindre &auml;n en punkts storlek och att &quot;tiden&quot; utpl&aring;nas p&aring; samma s&auml;tt som en eldsl&aring;ga som slocknar.<\/p>\n<p>Onekligen slagkraftiga metaforer!<\/p>\n<p><a href=\"https:\/\/www.astb.se\/cassiopeiabloggen\/wp-content\/uploads\/2012\/01\/papper-001_1018132981.jpg\"><img decoding=\"async\" alt=\"\" class=\"aligncenter size-thumbnail wp-image-26394\" height=\"150\" src=\"https:\/\/www.astb.se\/cassiopeiabloggen\/wp-content\/uploads\/2012\/01\/papper-001_1018132981-150x150.jpg\" title=\"F\u00f6rs\u00f6k skrynkla ihop ett papper till en...\" width=\"150\" \/><\/a><\/p>\n<p><a href=\"https:\/\/www.astb.se\/cassiopeiabloggen\/wp-content\/uploads\/2012\/01\/dot.jpg\"><img decoding=\"async\" alt=\"\" class=\"aligncenter size-thumbnail wp-image-26395\" height=\"150\" src=\"https:\/\/www.astb.se\/cassiopeiabloggen\/wp-content\/uploads\/2012\/01\/dot-150x150.jpg\" title=\"... en punkt och du \u00e4r p\u00e5 god v\u00e4g att f\u00f6rklara ett svart h\u00e5l.\" width=\"150\" srcset=\"https:\/\/www.astb.se\/cassiopeiabloggen\/wp-content\/uploads\/2012\/01\/dot-150x150.jpg 150w, https:\/\/www.astb.se\/cassiopeiabloggen\/wp-content\/uploads\/2012\/01\/dot.jpg 300w\" sizes=\"(max-width: 150px) 100vw, 150px\" \/><\/a><\/p>\n<p>Vi borde l&auml;sa p&aring; Wheelers sj&auml;lvbiografi <em>Geons, Black Holes &amp; Quantum Foam: A Life in Physics<\/em>, som kom 1999. Den <a href=\"http:\/\/www.amazon.com\/\">ska finnas p&aring; Amazon<\/a>.<\/p>\n<p>Wheeler dog 2008, 96 &aring;r gammal.<\/p>\n<p>Som forskare p&aring; h&ouml;gersidan i USA, v&auml;n till <strong>Ike Eisenhower, Ronald Reagan, Edward Teller<\/strong> m fl, var han f&ouml;rmodligen f&ouml;r kontroversiell f&ouml;r ett i Sverige politiskt korrekt Nobelpris i fysik.<\/p>\n<h2>Stj&auml;rnring av koloxid<\/h2>\n<p>Astronomer har <a href=\"http:\/\/arxiv.org\/abs\/1112.6181\">uppt&auml;ckt en ring av kolmonoxid runt stj&auml;rnan V 1052 Cen<\/a> p&aring; sytdstj&auml;rnhimlen, 700 ljus&aring;r bort.<\/p>\n<p><a href=\"https:\/\/www.astb.se\/cassiopeiabloggen\/wp-content\/uploads\/2012\/01\/image18.jpg\"><img decoding=\"async\" alt=\"\" class=\"alignleft size-thumbnail wp-image-26386\" height=\"142\" src=\"https:\/\/www.astb.se\/cassiopeiabloggen\/wp-content\/uploads\/2012\/01\/image18-150x142.jpg\" title=\"Ringar runt stj\u00e4rna. Ill: NASA\/JPL\/CALTECH\" width=\"150\" \/><\/a>Ringen befinner sig ungef&auml;r p&aring; &quot;jordavst&aring;nd&quot; fr&aring;n stj&auml;rnan, 1 AU, och fr&aring;gan &auml;r nu vad allt detta betyder. Uppt&auml;ckten har gjorts med hj&auml;lp av ESO:s VLT-bamse, och som vanligt sl&aring;r forskare rekord i pedagogiska j&auml;mf&ouml;relser: Ringen med en bredd p&aring; 0,32 AU &auml;r mer p&aring;minnande om ett &quot;rep&quot; &auml;n en &quot;tallrik&quot;, vilket tydligen &auml;r det vanliga n&auml;r vi diskuterar CO runt stj&auml;rnor.<\/p>\n<p>F&ouml;rmodligen sp&ouml;kar kraftiga magnetf&auml;lt i f&ouml;rklaringen liksom att stj&auml;rnan roterar ovanligt l&aring;ngsamt, detta enligt Potsdam-forskaren <strong>Swetlana Hubrig<\/strong>.<\/p>\n<p>Astronomerna fick &ouml;gonen p&aring; stj&auml;rnan 2008, och d&auml;r har den f&ouml;rblivit sen dess.<\/p>\n<p>Som en pendang till ovanst&aring;ende fick jag h&auml;rom dan syn p&aring; en artikel i <em>Vistas in Astronomy <\/em>fr&aring;n 1956, f&ouml;rfattad av legenden <strong>R A Lyttleton<\/strong>, som h&auml;ftigt angrep <strong>Sir James Jeans <\/strong>f&ouml;r dennes tidigare stj&auml;rnteori som inte tog h&auml;nsyn till ackretionsskivor och &ouml;verf&ouml;ring av massa fr&aring;n t ex ett interstell&auml;rt moln som en stj&auml;rna passerade igenom (vilket var Lyttletons specialitet).<\/p>\n<p>I dag &auml;r &quot;diskarna&quot; vardagsmat i astronomernas skafferi, och nu har vi till och med hittat koloxid-ringar&#8230; wow!<\/p>\n<h2>Mycket yyyyl i G&ouml;ran Strands vargm&aring;ne<\/h2>\n<p>Grattis till en annan av W-bloggens astrofotograferande favoriter, <strong>G&ouml;ran Strand <\/strong>i &Ouml;stersund, vars m&aring;nbild i dag utg&ouml;r NASA:s APOD &#8211; Astronomy Picture Of the Day:<\/p>\n<p><a href=\"https:\/\/www.astb.se\/cassiopeiabloggen\/wp-content\/uploads\/2012\/01\/GS_20120108_Moon_0010_900.jpg\"><img decoding=\"async\" width=\"900\" height=\"599\" alt=\"\" class=\"aligncenter size-full wp-image-26374\" src=\"https:\/\/www.astb.se\/cassiopeiabloggen\/wp-content\/uploads\/2012\/01\/GS_20120108_Moon_0010_900.jpg\" style=\"width: 484px; height: 323px;\" srcset=\"https:\/\/www.astb.se\/cassiopeiabloggen\/wp-content\/uploads\/2012\/01\/GS_20120108_Moon_0010_900.jpg 900w, https:\/\/www.astb.se\/cassiopeiabloggen\/wp-content\/uploads\/2012\/01\/GS_20120108_Moon_0010_900-300x199.jpg 300w\" sizes=\"(max-width: 900px) 100vw, 900px\" \/><\/a><\/p>\n<p>Helgfrid &ouml;nskas b&aring;de fyrbenta vargar och tv&aring;benta jordbor.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Nestorn Runes M42 &#8211; f&ouml;re och efter I julas hade jag anledning att &aring;terge v&auml;nnen Rune Fogelquists suver&auml;na foto av Orionnebulosan, M 42 (W-bloggen nr 321 2011). N&auml;r Rune tog den bilden? N&aring;n g&aring;ng i slutet av 80-talet. Desto s&auml;krare &auml;r att han fotade med sin 38 cm reflektor, br&auml;nnvidd 2,5 meter. Rune har g&aring;tt&hellip;&nbsp;<a href=\"https:\/\/www.astb.se\/cassiopeiabloggen\/2012\/01\/20\/nr-19-2012\/\" rel=\"bookmark\">L\u00e4s mer &raquo;<span class=\"screen-reader-text\">Nr 19 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 4.9.8 - aioseo.com -->\n\t<meta name=\"description\" content=\"Nestorn Runes M42 - f\u00f6re och efter I julas hade jag anledning att \u00e5terge v\u00e4nnen Rune Fogelquists suver\u00e4na foto av Orionnebulosan, M 42 (W-bloggen nr 321 2011). 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