{"id":74677,"date":"2017-11-18T18:57:30","date_gmt":"2017-11-18T17:57:30","guid":{"rendered":"http:\/\/www.astb.se\/cassiopeiabloggen\/?p=74677"},"modified":"2017-11-19T15:06:33","modified_gmt":"2017-11-19T14:06:33","slug":"nr-118-2017","status":"publish","type":"post","link":"https:\/\/www.astb.se\/cassiopeiabloggen\/2017\/11\/18\/nr-118-2017\/","title":{"rendered":"Nr 118 2017"},"content":{"rendered":"<div class=\"x y\" title=\"Kommentarer\">\n<h2>\n\t\t<strong>Leoniderna &auml;r &ouml;ver oss<\/strong><br \/>\n\t<\/h2>\n<p>\n\t\tMin gamle kompis och chefredakt&ouml;r&nbsp;<strong> Staffan Erfors<\/strong> basar numera f&ouml;<strong><em>r <\/em><\/strong><em>Metro <\/em>och var v&auml;nlig nog att uppm&auml;rksamma meteorsv&auml;rmen Leoniderna senast &#8211; <a href=\"https:\/\/www.metro.se\/artikel\/nu-fylls-himlen-av-stj%C3%A4rnfall-fr%C3%A5n-lejonet-extra-sev%C3%A4rt-i-%C3%A5r\">med en intervju med Peter Linde.<\/a> Bra!\n\t<\/p>\n<p>\n\t\t<a href=\"https:\/\/www.astb.se\/cassiopeiabloggen\/wp-content\/uploads\/2017\/11\/meterororo-LARGE-e1511026632244.jpg\"><img decoding=\"async\" alt=\"meterororo-LARGE\" class=\"aligncenter size-full wp-image-74702\" height=\"267\" src=\"https:\/\/www.astb.se\/cassiopeiabloggen\/wp-content\/uploads\/2017\/11\/meterororo-LARGE-e1511026632244.jpg\" width=\"400\" \/><\/a>\n\t<\/p>\n<p style=\"text-align: center;\">\n\t\t<em>Bildk&auml;lla:Metro\/TT<\/em>\n\t<\/p>\n<p>\n\t\tSamtidigt d&ouml;k W-bloggens eminens i Uddevalla <strong>Christian Vestergaard<\/strong> upp med ett m&aring;leriskt&nbsp; fynd p&aring; Leoniderna:\n\t<\/p>\n<p>\n\t\t<a href=\"https:\/\/www.astb.se\/cassiopeiabloggen\/wp-content\/uploads\/2017\/11\/leonids-1.jpg\"><img decoding=\"async\" alt=\"leonids-1\" class=\"aligncenter size-full wp-image-74685\" height=\"344\" src=\"https:\/\/www.astb.se\/cassiopeiabloggen\/wp-content\/uploads\/2017\/11\/leonids-1.jpg\" width=\"501\" srcset=\"https:\/\/www.astb.se\/cassiopeiabloggen\/wp-content\/uploads\/2017\/11\/leonids-1.jpg 601w, https:\/\/www.astb.se\/cassiopeiabloggen\/wp-content\/uploads\/2017\/11\/leonids-1-300x206.jpg 300w, https:\/\/www.astb.se\/cassiopeiabloggen\/wp-content\/uploads\/2017\/11\/leonids-1-200x137.jpg 200w\" sizes=\"(max-width: 501px) 100vw, 501px\" \/><\/a>\n\t<\/p>\n<div>\n\t\t&#8211; M&aring;laren &auml;r Oslobon<strong> Erik&nbsp;Arnesen<\/strong>&nbsp;&quot;anno&quot;&nbsp;1913.&nbsp;Tror&nbsp;att&nbsp;konstverket ben&auml;mns&nbsp;&quot;1833&nbsp;&aring;rs&nbsp;Leonider&quot;,&nbsp; p&aring;pekar CV.\n\t<\/div>\n<div>\n\t\tSenaste nytt om &aring;rets &quot;utfall&quot; av Leoniderna<a href=\"https:\/\/www.imo.net\/\"> finns h&auml;r. <\/a>Denna l&ouml;rdagkv&auml;ll forts&auml;tter aktivitetskurvan peka upp&aring;t.\n\t<\/div>\n<h2>\n\t\t<strong>James Jeans f&aring;r r&auml;tt i ett fall &#8211; i alla fall<\/strong><br \/>\n\t<\/h2>\n<p>\n\t\tId&eacute;n &auml;r gammal, fr&aring;n <strong>James Jeans<\/strong> dagar, att planeter bildas n&auml;r stj&auml;rnor passerar varandera och sliter ifr&aring;n varandra gas- och stoft som skapar planeterna. Nu finns<a href=\"http:\/\/Did a stellar fly-by shape the planetary system around Pr 0211 in the cluster M 44? Susanne Pfalzner, Asmita Bhandare, Kirsten Vincke (Submitted on 16 Nov 2017)      Out of the \u223c 3000 exoplanets detected so far, only fourteen planets are members of open clusters: among them an exoplanet system around Pr 0211 in the cluster M44 which consists of at least two planets with the outer planet moving on a highly eccentric orbit at 5.5 AU. One hypothesis is that a close fly-by of a neighbouring star was responsible for the eccentric orbit. We test this hypothesis. First we determine the type of fly-by that would lead to the observed parameters and then use this result to determine the history of such fly-bys in simulations of the early dynamics in an M44-like environment. We find that although very close fly-bys are required to obtain the observed properties of Pr 0211c, such fly-bys are relatively common due to the high stellar density and longevity of the cluster. Such close fly-bys are most frequent during the first 1-2 Myr after cluster formation, corresponding to a cluster age \u2264 3 Myr. During the first 2 to 3 Myr about 6.5% of stars actually experience a fly-by that would lead to such a small system-size as observed for Pr0211 or even smaller. It is unclear whether planets generally form on such short timescales. However, afterwards the close fly-by rate is still 0.2-0.5 Myr\u22121, which means extrapolating this to the age of M44 12%-20% of stars would experience such close fly-bys over this timespan. Our simulations show that the fly-by scenario is a realistic option for the formation of eccentricity orbits of the planets in M44. The occurrence of such events is relatively high leading to the expectation that similar systems are likely common in open clusters in general.\"> ett t&auml;nkbart exempel p&aring;&nbsp; denna teori: <\/a>\n\t<\/p>\n<p>\n\t\tPlanetsystemet Pr 0211 i klassiska stj&auml;rnhopen M44, Bikupan.\n\t<\/p>\n<h2>\n\t\t<strong>Malm&ouml;-Aniara i SVT i kv&auml;ll<\/strong><br \/>\n\t<\/h2>\n<p>\n\t\tV&aring;rens Aniara-f&ouml;rest&auml;llning p&aring; Malm&ouml; Opera s&auml;nds l&ouml;rdag kv&auml;ll (18.,11) i SVT. F&ouml;rest&auml;llningen &auml;r f&ouml;rn&auml;mlig, mer oratorium &auml;n opera,&nbsp; och de som k&ouml;pte programmet kunde l&auml;sa en artikel av W-bloggens ansvarige plus fick man en fin bild i programmet av Andromeda-galaxen tagen av <strong>Peter Larsson.<\/strong>\n\t<\/p>\n<p>\n\t\t<a href=\"https:\/\/www.astb.se\/cassiopeiabloggen\/wp-content\/uploads\/2017\/11\/170425aniara1117.jpg\"><img decoding=\"async\" alt=\"170425aniara1117\" class=\"aligncenter size-full wp-image-74710\" height=\"525\" src=\"https:\/\/www.astb.se\/cassiopeiabloggen\/wp-content\/uploads\/2017\/11\/170425aniara1117.jpg\" width=\"350\" srcset=\"https:\/\/www.astb.se\/cassiopeiabloggen\/wp-content\/uploads\/2017\/11\/170425aniara1117.jpg 350w, https:\/\/www.astb.se\/cassiopeiabloggen\/wp-content\/uploads\/2017\/11\/170425aniara1117-200x300.jpg 200w, https:\/\/www.astb.se\/cassiopeiabloggen\/wp-content\/uploads\/2017\/11\/170425aniara1117-133x200.jpg 133w\" sizes=\"(max-width: 350px) 100vw, 350px\" \/><\/a>\n\t<\/p>\n<p style=\"text-align: center;\">\n\t\t<em>Scen ur f&ouml;rest&auml;llningen. Bildk&auml;lla: Malm&ouml; Opera<\/em>\n\t<\/p>\n<h2>\n\t\t<strong>Medicinare uppt&auml;cker nya&nbsp; faror med rymdresor<\/strong><br \/>\n\t<\/h2>\n<p>\n\t\tTack till W-bloggens medicink&auml;nnaqre <strong>Carl-Olof B&ouml;rjeson,<\/strong> som ber&auml;ttar om en artikel i&nbsp; <em>New England Journal of Medicine som&nbsp; <\/em>handlar om negativa effekter p&aring; centrala nervsystemet och &ouml;gonen hos 34 amerikanska astronauter efter vistelse i rymden.\n\t<\/p>\n<div>\n\t\t&#8211; MRI st&aring;r f&ouml;r&nbsp; <span style=\"background-color: rgb(255,255,255);\"><font color=\"#545454\" face=\"arial, sans-serif\" size=\"2\">Magnetisk resonanstomografi,&nbsp;&rsquo;&rsquo;magnetkamera&#39;&#39; till vardags, tipsar COB.<\/font><\/span>\n\t<\/div>\n<div class=\"page\" style=\"word-wrap: break-word;max-width: 100.0%;\">\n<p>\n\t\t\tDen orov&auml;ckande artikeln med rubriken &quot;Effects of Spaceflight on Astronaut Brain Structure as Indicated on MRI&quot; finns h&auml;r och dess resultat i korthet f&ouml;ljer nedan p&aring; medicinengelska:<br \/>\n\t\t\t<a href=\"http:\/\/www.nejm.org\/doi\/full\/10.1056\/NEJMoa1705129\">http:\/\/www.nejm.org\/doi\/full\/10.1056\/NEJMoa1705129<\/a>\n\t\t<\/p>\n<p style=\"text-align: center;\">\n\t\t\t<strong>* &nbsp;&nbsp; * &nbsp;&nbsp; *<\/strong>\n\t\t<\/p>\n<div style=\"max-width: 100.0%;\">\n<p style=\"max-width: 100.0%;\">\n\t\t\t\t<em>&quot;Narrowing of the central sulcus occurred in 17 of 18 astronauts after long-duration flights (mean flight time, 164.8 days) and in 3 of 16 astronauts after short-duration flights (mean flight time, 13.6 days) (P&lt;0.001). Cine clips from a subgroup of astronauts showed an upward shift of the brain after all long-duration flights (12 astronauts) but not after short-duration flights (6 astronauts) and narrowing of CSF spaces at the vertex after all long-duration flights (12 astronauts) and in 1 of 6 astronauts after short-duration flights. Three astronauts in the long-duration group had optic-disk edema, and all 3 had narrowing of the central sulcus. A cine clip was available for 1 of these 3 astronauts, and the cine clip showed upward shift of the brain.<\/em>\n\t\t\t<\/p>\n<p>\n\t\t\t\t<a href=\"https:\/\/www.astb.se\/cassiopeiabloggen\/wp-content\/uploads\/2017\/11\/300px-Christer_Fuglesang.jpg\"><img decoding=\"async\" alt=\"300px-Christer_Fuglesang\" class=\"aligncenter size-full wp-image-74706\" height=\"375\" src=\"https:\/\/www.astb.se\/cassiopeiabloggen\/wp-content\/uploads\/2017\/11\/300px-Christer_Fuglesang.jpg\" width=\"300\" srcset=\"https:\/\/www.astb.se\/cassiopeiabloggen\/wp-content\/uploads\/2017\/11\/300px-Christer_Fuglesang.jpg 300w, https:\/\/www.astb.se\/cassiopeiabloggen\/wp-content\/uploads\/2017\/11\/300px-Christer_Fuglesang-240x300.jpg 240w, https:\/\/www.astb.se\/cassiopeiabloggen\/wp-content\/uploads\/2017\/11\/300px-Christer_Fuglesang-160x200.jpg 160w\" sizes=\"(max-width: 300px) 100vw, 300px\" \/><\/a>\n\t\t\t<\/p>\n<p style=\"text-align: center;\">\n\t\t\t\t<em>Levde farligt? Bildk&auml;lla: Wikipedia<\/em>\n\t\t\t<\/p>\n<\/p><\/div>\n<div style=\"max-width: 100.0%;\">\n<h3 style=\"font-size: 1.05em;max-width: 100.0%;\">\n\t\t\t\t<em>Conclusions<\/em><br \/>\n\t\t\t<\/h3>\n<p style=\"max-width: 100.0%;\">\n\t\t\t\t<em>Narrowing of the central sulcus, upward shift of the brain, and narrowing of CSF spaces at the vertex occurred frequently and predominantly in astronauts after long-duration flights. Further investigation, including repeated postflight imaging conducted after some time on Earth, is required to determine the duration and clinical significance of these changes. (Funded by the National Aeronautics and Space Administration.)&quot;<\/em>\n\t\t\t<\/p>\n<h2>\n\t\t\t\t<strong>Meteoren &ouml;ver norra Finland<\/strong><br \/>\n\t\t\t<\/h2>\n<p>\n\t\t\t\tEn h&auml;ftig meteor noterades &ouml;ver norra Finland in &ouml;ver Sverige och Norge i g&aring;r 17 november. Tack till <strong>Mirja Markkula<\/strong> m fl som larmade. Youtube-film h&auml;r:\n\t\t\t<\/p>\n<p>\n\t\t\t\t<a href=\"https:\/\/lm.facebook.com\/l.php?u=http%3A%2F%2Fwww.youtube.com%2Fc%2FAuroraBorealisLIVE&amp;h=ATMsT3HVOwkquzcumpM2OyFMkrLN_3KVsQOAikjm0lSVpj4_s1-k93ZZyMqzH2WOIrIE_dN-FbwndHRiqSKxKzffZkHwfWEnZbYOVWiDUjop9-4Zo8CByxIVuNyfEHbW42Y5zXiSlg&amp;enc=AZPxK3tlV_WzF7SfOgEaFAl-OzZPW9g8L6w7nf0kmcQWzz8Z54qR86IHqLfiwn4BWYRqdAQIjcRM7F7yukxVRdEzD7oeRG0LSP65hS774sbMU7WZZnvyYD1i3da4VVfGKxy4berHAN1y5i5Z0_nDuNsWgeNvbybilPcYZJbC_wBkPxXZC9sCpsiDoeoESQ_Rv3U&amp;s=1\" target=\"_blank\"><span>http:\/\/<\/span><wbr \/><span>www.youtube.com\/<\/span><wbr \/><span>c\/<\/span><wbr \/><span>AuroraBorealisLI<\/span><wbr \/>VE<\/a>\n\t\t\t<\/p>\n<h2>\n\t\t\t\t<strong>Arecibo r&auml;ddas?<\/strong><br \/>\n\t\t\t<\/h2>\n<p>\n\t\t\t\tAmerikanska NSF som i National Science Foundation, en m&auml;ktig r&ouml;st i US-vetenskapen,<a href=\"https:\/\/aas.org\/posts\/blog\/2017\/11\/nsf-announces-selection-path-forward-arecibo-observatory\"> har formulerat ett &quot;Record of Decision for the Arecibo Observatory in Puerto Rico&quot;, <\/a>som &auml;r ett tappert f&ouml;rs&ouml;k att trolla med kn&auml;na: H&aring;lla observatoriet vid liv med hj&auml;lp av&nbsp; nya samarbetspartners, producera toppvetenskap, men med mindre budget.\n\t\t\t<\/p>\n<p>\n\t\t\t\tProblemet &auml;r inte bara dollars. Orkanerna har &auml;ven drabbat observatoriet och dess personal.\n\t\t\t<\/p>\n<p>\n\t\t\t\t<a href=\"https:\/\/www.astb.se\/cassiopeiabloggen\/wp-content\/uploads\/2017\/11\/download.jpg\"><img decoding=\"async\" alt=\"download\" class=\"aligncenter size-full wp-image-74720\" height=\"183\" src=\"https:\/\/www.astb.se\/cassiopeiabloggen\/wp-content\/uploads\/2017\/11\/download.jpg\" width=\"275\" srcset=\"https:\/\/www.astb.se\/cassiopeiabloggen\/wp-content\/uploads\/2017\/11\/download.jpg 275w, https:\/\/www.astb.se\/cassiopeiabloggen\/wp-content\/uploads\/2017\/11\/download-200x133.jpg 200w\" sizes=\"(max-width: 275px) 100vw, 275px\" \/><\/a>\n\t\t\t<\/p>\n<p style=\"text-align: center;\">\n\t\t\t\t<em>Orosmoln&#8230; Bildk&auml;lla: space.com<\/em>\n\t\t\t<\/p>\n<h2>\n\t\t\t\t<strong>Slottsskogsobsis uppe p&aring; dagordningen<\/strong><br \/>\n\t\t\t<\/h2>\n<p>\n\t\t\t\tNu har&nbsp; kampanjen f&ouml;r att r&auml;dda Slottsskogsobservatoriet i G&ouml;teborg n&aring;tt n&auml;stan &auml;nda fram &#8211; till <a href=\"http:\/\/www4.goteborg.se\/prod\/intraservice\/namndhandlingar\/samrumportal.nsf\/3E5A0C8287C69446C12581D700529CB2\/$File\/2.2.6_20171122.pdf?OpenElement\">ett akutbeslut i G&ouml;teborgs kommunstyrelse.<\/a> M&aring;tte det g&aring; v&auml;gen!\n\t\t\t<\/p>\n<p>\n\t\t\t\t<a href=\"https:\/\/www.astb.se\/cassiopeiabloggen\/wp-content\/uploads\/2017\/11\/images1.jpg\"><img decoding=\"async\" alt=\"images\" class=\"aligncenter size-full wp-image-74713\" height=\"166\" src=\"https:\/\/www.astb.se\/cassiopeiabloggen\/wp-content\/uploads\/2017\/11\/images1.jpg\" width=\"303\" srcset=\"https:\/\/www.astb.se\/cassiopeiabloggen\/wp-content\/uploads\/2017\/11\/images1.jpg 303w, https:\/\/www.astb.se\/cassiopeiabloggen\/wp-content\/uploads\/2017\/11\/images1-300x164.jpg 300w, https:\/\/www.astb.se\/cassiopeiabloggen\/wp-content\/uploads\/2017\/11\/images1-200x109.jpg 200w\" sizes=\"(max-width: 303px) 100vw, 303px\" \/><\/a>\n\t\t\t<\/p>\n<\/p><\/div>\n<\/p><\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>Leoniderna &auml;r &ouml;ver oss Min gamle kompis och chefredakt&ouml;r&nbsp; Staffan Erfors basar numera f&ouml;r Metro och var v&auml;nlig nog att uppm&auml;rksamma meteorsv&auml;rmen Leoniderna senast &#8211; med en intervju med Peter Linde. Bra! Bildk&auml;lla:Metro\/TT Samtidigt d&ouml;k W-bloggens eminens i Uddevalla Christian Vestergaard upp med ett m&aring;leriskt&nbsp; fynd p&aring; Leoniderna: &#8211; M&aring;laren &auml;r Oslobon Erik&nbsp;Arnesen&nbsp;&quot;anno&quot;&nbsp;1913.&nbsp;Tror&nbsp;att&nbsp;konstverket ben&auml;mns&nbsp;&quot;1833&nbsp;&aring;rs&nbsp;Leonider&quot;,&nbsp; p&aring;pekar&hellip;&nbsp;<a href=\"https:\/\/www.astb.se\/cassiopeiabloggen\/2017\/11\/18\/nr-118-2017\/\" rel=\"bookmark\">L\u00e4s mer &raquo;<span class=\"screen-reader-text\">Nr 118 2017<\/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":[],"_links":{"self":[{"href":"https:\/\/www.astb.se\/cassiopeiabloggen\/wp-json\/wp\/v2\/posts\/74677"}],"collection":[{"href":"https:\/\/www.astb.se\/cassiopeiabloggen\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.astb.se\/cassiopeiabloggen\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.astb.se\/cassiopeiabloggen\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.astb.se\/cassiopeiabloggen\/wp-json\/wp\/v2\/comments?post=74677"}],"version-history":[{"count":37,"href":"https:\/\/www.astb.se\/cassiopeiabloggen\/wp-json\/wp\/v2\/posts\/74677\/revisions"}],"predecessor-version":[{"id":74723,"href":"https:\/\/www.astb.se\/cassiopeiabloggen\/wp-json\/wp\/v2\/posts\/74677\/revisions\/74723"}],"wp:attachment":[{"href":"https:\/\/www.astb.se\/cassiopeiabloggen\/wp-json\/wp\/v2\/media?parent=74677"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.astb.se\/cassiopeiabloggen\/wp-json\/wp\/v2\/categories?post=74677"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.astb.se\/cassiopeiabloggen\/wp-json\/wp\/v2\/tags?post=74677"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}