Az el\u0151ad\u00f3 l\u00e9p\u00e9sr\u0151l l\u00e9p\u00e9sre \u2013 l\u00e1tv\u00e1nyos felv\u00e9telekkel illusztr\u00e1lva mondand\u00f3j\u00e1t, mivel maga is szenved\u00e9lyes asztrofot\u00f3s \u2013 t\u00e1rta f\u00f6l a g\u00f6mbhalmazok titkait az alaptudnival\u00f3kt\u00f3l kezdve eg\u00e9szen az olyan apr\u00f3 r\u00e9szletekig, amelyek m\u00e1r n\u00e9mi csillag\u00e1szati el\u0151k\u00e9pzetts\u00e9get, de fizikai ismereteket mindenk\u00e9ppen ig\u00e9nyelnek.<\/p>\n
Annyit minden, puszt\u00e1n a k\u00edv\u00e1ncsis\u00e1g vez\u00e9relte \u00e9rdekl\u0151d\u0151nek is \u00e9rdemes tudnia, hogy a g\u00f6mbhalmaz \u2013 ahogy a nev\u00fck is utal r\u00e1 \u2013 csillagok g\u00f6mb alak\u00fa csoportja, amely 10 000-t\u0151l 50 milli\u00f3ig terjed\u0151 sz\u00e1m\u00fa tagot tartalmazhat, meglehet\u0151sen kicsi ter\u00fcleten. Korukat tekintve \u00f6regek, a legfiatalabbak is 8\u201310 milli\u00e1rd \u00e9vesek, b\u00e1r a halmaz tagjai nem egyid\u0151ben keletkeztek, hanem t\u00f6bb hull\u00e1mban j\u00f6ttek l\u00e9tre. A csillagok a halmaz k\u00f6zpontja fel\u00e9 annyira \u00f6sszes\u0171r\u0171s\u00f6dnek, hogy nagy t\u00e1vcs\u00f6vekkel sem lehet \u0151ket sz\u00e9tv\u00e1lasztani, ebb\u0151l a nagy s\u0171r\u0171s\u00e9gb\u0151l ered\u0151 gravit\u00e1ci\u00f3 az, ami \u00f6sszetartja g\u00f6mbhalmazokat. Ebb\u0151l k\u00f6vetkezik az is, hogy a nagyobb t\u00f6meg\u0171 csillagok \u2013 migr\u00e1ci\u00f3nak nevezik ezt szaknyelven! \u2013 a halmaz magja fel\u00e9 v\u00e1ndorolnak. <\/p>\n
A Tej\u00fatrendszerben mintegy 150 g\u00f6mbhalmazt tartanak nyilv\u00e1n, de amint T\u00f3th Kriszti\u00e1nt\u00f3l megtudtuk, sz\u00e1muk a 180-t is el\u00e9rheti, de az Androm\u00e9da galaxisban 500 is van bel\u0151l\u00fck. A g\u00f6mbhalmaz elnevez\u00e9st a kor\u00e1ban (a XVIII. sz\u00e1zad m\u00e1sodik fele) neves csillag\u00e1sznak sz\u00e1m\u00edt\u00f3 n\u00e9met sz\u00e1rmaz\u00e1s\u00fa William Herschel alkalmazta el\u0151sz\u00f6r, de a jelens\u00e9g kutat\u00e1sa val\u00f3j\u00e1ban a XX. sz\u00e1zadban kezd\u0151d\u00f6tt, ami a megfigyel\u00e9s\u00fck mellett egy\u00fctt j\u00e1rt az oszt\u00e1lyoz\u00e1sukkal is, egy 12 fokozat\u00fa sk\u00e1l\u00e1n helyezik el a halmazokat s\u0171r\u0171s\u00e9g\u00fck alapj\u00e1n. A g\u00f6mbhalmazok mozg\u00e1s\u00e1b\u00f3l lehet k\u00f6vetkeztetni p\u00e9ld\u00e1ul egy galaxi kialakul\u00e1s\u00e1nak t\u00f6rt\u00e9net\u00e9re, de a Tej\u00fatrendszer
\nt\u00f6mege is m\u00e9rhet\u0151 \u00e1ltaluk.<\/p>","protected":false},"excerpt":{"rendered":"
Harmadik \u00e9vadj\u00e1t z\u00e1rta az \u00c9rdi Csillag\u00e1szati Klub. A mostani \u00e9vadz\u00e1r\u00f3 el\u0151ad\u00e1s \u2013 T\u00f3th Kriszti\u00e1n amat\u0151r csillag\u00e1sz tartotta \u2013 a g\u00f6mbhalmazok vil\u00e1g\u00e1ba kalauzolta el a hallgat\u00f3kat.<\/p>","protected":false},"author":8,"featured_media":0,"comment_status":"","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"_seopress_robots_primary_cat":"","_seopress_titles_title":"","_seopress_titles_desc":"","_seopress_robots_index":"","site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[1],"cikk_cimkek":[25,6],"content_flags":[],"content_icons":[],"class_list":["post-5624","post","type-post","status-publish","format-standard","hentry","category-erdmost","cikk_cimkek-mindennapok","cikk_cimkek-tudomany"],"acf":[],"_links":{"self":[{"href":"https:\/\/erdmost.hu\/en\/wp-json\/wp\/v2\/posts\/5624","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/erdmost.hu\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/erdmost.hu\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/erdmost.hu\/en\/wp-json\/wp\/v2\/users\/8"}],"replies":[{"embeddable":true,"href":"https:\/\/erdmost.hu\/en\/wp-json\/wp\/v2\/comments?post=5624"}],"version-history":[{"count":0,"href":"https:\/\/erdmost.hu\/en\/wp-json\/wp\/v2\/posts\/5624\/revisions"}],"wp:attachment":[{"href":"https:\/\/erdmost.hu\/en\/wp-json\/wp\/v2\/media?parent=5624"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/erdmost.hu\/en\/wp-json\/wp\/v2\/categories?post=5624"},{"taxonomy":"cikk_cimkek","embeddable":true,"href":"https:\/\/erdmost.hu\/en\/wp-json\/wp\/v2\/cikk_cimkek?post=5624"},{"taxonomy":"content_flags","embeddable":true,"href":"https:\/\/erdmost.hu\/en\/wp-json\/wp\/v2\/content_flags?post=5624"},{"taxonomy":"content_icons","embeddable":true,"href":"https:\/\/erdmost.hu\/en\/wp-json\/wp\/v2\/content_icons?post=5624"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}