{"id":99698,"date":"2026-10-26T18:29:54","date_gmt":"2026-10-26T17:29:54","guid":{"rendered":"https:\/\/www.astb.se\/cassiopeiabloggen\/?p=99698"},"modified":"2026-10-26T19:30:26","modified_gmt":"2026-10-26T18:30:26","slug":"nr-45-2026","status":"publish","type":"post","link":"https:\/\/www.astb.se\/cassiopeiabloggen\/2026\/10\/26\/nr-45-2026\/","title":{"rendered":"Nr 45 2026"},"content":{"rendered":"\r\n

Vad h\u00e4nder med Betelgeuse?<\/span><\/strong><\/p>\r\n

Dags att \u00e5terigen h\u00e5lla\u00a0 visuell koll p\u00e5 Betelgeuse i Orion. N\u00e5nting \u00e4r p\u00e5 g\u00e5ng igen ned\u00e5t i magnituden. B\u00e5de amat\u00f6rer och proffs h\u00e5ller koll. Denna rapport f\u00f6r en tid sedan i Astronomer\u00b4s Telegram<\/em>:<\/p>\r\n

https:\/\/www.astronomerstelegram.org\/?read=18097<\/a><\/p>\r\n

Senaste nytt h\u00e4r (stj\u00e4rnan har stannat runt 1 magn):<\/p>\r\n

https:\/\/www.astronomerstelegram.org\/?read=18114<\/a><\/p>\r\n

\u00c4ven SAAF:s variablister\u00a0 \u00e4r vaksamma.<\/p>\r\n

Spektroskopstudier talar om infallande materia fr\u00e5n stj\u00e4rnatmosf\u00e4ren som orsak till skeendet.<\/p>\r\n

Stj\u00e4rna\u00a0 \u2192 stj\u00e4rnhop <\/span><\/span>\u00a0\u2192\u00a0svart h\u00e5l<\/span><\/h2>\r\n\r\n\r\n\r\n

Det fanns en tid d\u00e5 astronomer typ James Jeans<\/strong> trodde att planeter uppkom d\u00e5 solar passerade varandra och slet ut materia fr\u00e5n varandras stj\u00e4rkroppar vid m\u00f6tena. Materien bildade sen planeter. Det tror ingen p\u00e5 l\u00e4ngre.<\/p>\r\n\r\n\r\n\r\n

Betyder det att stj\u00e4rnor aldrig krockar? Nj\u00e4e, s\u00e5 enkelt \u00e4r det inte heller. James Webb-teleskopet har kommit universums tidiga epok p\u00e5 sp\u00e5ren och d\u00e5 var m\u00f6jligheten till stj\u00e4rnkrockar st\u00f6rre, rentav \u00e4gde ofta kollisioner rum. Tv\u00e5 processer f\u00f6rekom: antingen kolliderade stj\u00e4rnorna i h\u00f6g hastighet och f\u00f6rst\u00f6rdes helt eller s\u00e5 krockade de i mjukare fart och gick ihop till en stor stj\u00e4rna. Rapporten h\u00e4r <\/a><\/p>\r\n\r\n\r\n\r\n

Datorsimuleringarna visar att det finns en sorts trappa: stj\u00e4rnor g\u00e5r samman i en stj\u00e4rnhop och sen bildar stj\u00e4rnhopen en enda gigantisk massiva stj\u00e4rna, som d\u00e4refter kollapsar till ett svart h\u00e5l. Processen i mindre format \u00e4ger rum i v\u00e5r egen Vintergatas centrum.<\/p>\r\n\r\n\r\n\r\n

Rapporten ovan \u00e4r inte f\u00f6r dem med mitt svaga Ba i realmatte i avg\u00e5ngsbetyg p\u00e5 studentgymnasiet. En “enkel” skiss f\u00f6rklarar d\u00e4rf\u00f6r h\u00e4r hur det hela gick till:<\/p>\r\n\r\n\r\n

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Marsm\u00e5nen f\u00f6rm\u00f6rkades ocks\u00e5<\/h2>\r\n\r\n\r\n\r\n

Sent uppt\u00e4ckt: 12 augusti var en stor dag f\u00f6r alla v\u00e4nner av solf\u00f6rm\u00f6rkelser h\u00e4r p\u00e5 jorden, i alla fall i v\u00e4stra och s\u00f6dra Europa. \u00c4ven p\u00e5 grannplaneten Mars doldes en stor del av solen denna dag n\u00e4r Marsm\u00e5nen Phobos passerade \u00f6ver solen – f\u00e5ngad s\u00e5 h\u00e4r av NASA:s rover Perseverance.<\/p>\r\n\r\n\r\n\r\n

Fler bilder fr\u00e5n dessa transiter genom \u00e5ren \u00e5terfinns h\u00e4r: Phobos transits<\/a>.<\/p>\r\n\r\n\r\n\r\n\r\n

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 <\/p>\r\n","protected":false},"excerpt":{"rendered":"

Vad h\u00e4nder med Betelgeuse? Dags att \u00e5terigen h\u00e5lla\u00a0 visuell koll p\u00e5 Betelgeuse i Orion. N\u00e5nting \u00e4r p\u00e5 g\u00e5ng igen ned\u00e5t i magnituden. B\u00e5de amat\u00f6rer och proffs h\u00e5ller koll. Denna rapport f\u00f6r en tid sedan i Astronomer\u00b4s Telegram: https:\/\/www.astronomerstelegram.org\/?read=18097 Senaste nytt h\u00e4r (stj\u00e4rnan har stannat runt 1 magn): https:\/\/www.astronomerstelegram.org\/?read=18114 \u00c4ven SAAF:s variablister\u00a0 \u00e4r vaksamma. Spektroskopstudier talar… L\u00e4s mer »Nr 45 2026<\/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":"no","rop_publish_now_accounts":[],"rop_publish_now_history":[],"rop_publish_now_status":"pending","neve_meta_sidebar":"","neve_meta_container":"","neve_meta_enable_content_width":"off","neve_meta_content_width":70,"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\/99698"}],"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=99698"}],"version-history":[{"count":20,"href":"https:\/\/www.astb.se\/cassiopeiabloggen\/wp-json\/wp\/v2\/posts\/99698\/revisions"}],"predecessor-version":[{"id":99726,"href":"https:\/\/www.astb.se\/cassiopeiabloggen\/wp-json\/wp\/v2\/posts\/99698\/revisions\/99726"}],"wp:attachment":[{"href":"https:\/\/www.astb.se\/cassiopeiabloggen\/wp-json\/wp\/v2\/media?parent=99698"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.astb.se\/cassiopeiabloggen\/wp-json\/wp\/v2\/categories?post=99698"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.astb.se\/cassiopeiabloggen\/wp-json\/wp\/v2\/tags?post=99698"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}