{"id":28168,"date":"2025-01-20T23:35:08","date_gmt":"2025-01-20T20:35:08","guid":{"rendered":"http:\/\/www.e-kutuphane.com.tr\/?p=28168"},"modified":"2025-02-12T00:08:54","modified_gmt":"2025-02-11T21:08:54","slug":"omega-erboga","status":"publish","type":"post","link":"https:\/\/buradasin.com.tr\/kutuphane\/omega-erboga\/","title":{"rendered":"Omega Erbo\u011fa"},"content":{"rendered":"

\u00c7\u0131plak g\u00f6zle s\u00f6n\u00fck bir y\u0131ld\u0131z gibi g\u00f6r\u00fcnen Omega Erbo\u011fa<\/strong>, MS 1. y\u00fczy\u0131lda Ptolemaios taraf\u0131ndan da b\u00f6yle bir y\u0131ld\u0131z olarak kataloglan\u0131n\u0131\u015ft\u0131r. Ad\u0131ndan y\u0131ld\u0131z\u0131n Erbo\u011fa tak\u0131my\u0131ld\u0131z\u0131n\u0131n en parlak yirmi d\u00f6rd\u00fcnc\u00fc \u00fcyesi oldu\u011fu anla\u015f\u0131l\u0131yor. Tak\u0131my\u0131ld\u0131zlardaki en parlak y\u0131ld\u0131zlar, 1603 y\u0131l\u0131nda Al\u0131nan amat\u00f6r g\u00f6kbilimci Bayer tarafindan, parlakl\u0131k s\u0131ras\u0131na g\u00f6re Yunan alfabesinin harfleriyle adland\u0131r\u0131lm\u0131\u015ft\u0131r: Alfa, Beta, Gama . . . Bu s\u0131ralama Yunan alfabesinin son h arfi Omega’ya kadar gider. \u00c7a\u011fda\u015f g\u00f6kbilimciler hala bu sistemi kullan\u0131yor, ama daha fazla say\u0131da y\u0131ld\u0131z\u0131 adland\u0131rabilmek i\u00e7in rakamlara da ba\u015fvuruyorlar (\u00f6rne\u011fin Gl Ku\u011fu, 30 K\u0131l\u0131\u00e7bal\u0131\u011f\u0131).<\/p>\n

1667 y\u0131l\u0131nda Willi a\u0131n ve Caroline Herschel, yedi metre boyundaki dev teleskoplar\u0131yla sistematik bir bi\u00e7imde g\u00f6ky\u00fcz\u00fcn\u00fc tararken Omega Erbo\u011fa da g\u00f6r\u00fc\u015f alanlar\u0131na girdi. Bu cismi n \u00e7ok say\u0131da y\u0131ld\u0131zdan ol u\u015fan zengin bir k\u00fcme oldu\u011funu anlad\u0131lar. Gene parlak bir g\u00f6kbilimci olan o\u011fullar\u0131 John , k\u00fcme hakk\u0131nda \u015funlar\u0131 yazm\u0131\u015ft\u0131r: “G\u00f6rkemli Omega Erbo\u011fa y\u0131 ld\u0131z k\u00fcmesi, ne t\u00fcr bir kar\u015f\u0131la\u015ft\u0131rma yap\u0131l\u0131rsa yap\u0131ls\u0131n , g\u00f6ky\u00fcz\u00fcnde ken di t\u00fcr\u00fcndeki en b\u00fcy\u00fck ve en zengin k\u00fcmedir. \u0130\u00e7indeki y\u0131ld\u0131zlar\u0131
\nsaymak olanaks\u0131zd\u0131r. .. ”<\/p>\n

Ger\u00e7ekten de Omega Erbo\u011fa, altm\u0131\u015f \u0131\u015f\u0131k y\u0131 l\u0131 b\u00fcy\u00fckl\u00fc\u011f\u00fcndeki k\u00fcresel bir y\u0131ld\u0131z bulutunun i\u00e7ine s\u0131k\u0131\u015fm\u0131\u015f yakla\u015f\u0131k bir milyon y\u0131ld\u0131z\u0131 kapsamaktad\u0131r. G\u00fcne\u015f’e yak\u0131n b\u00f6lgelerde bu b\u00fcy\u00fckl\u00fckte bir hacme sahip yaln\u0131zca birka\u00e7 y\u00fcz y\u0131ld\u0131z bulunur. Bu sistemlere yo\u011fun , k\u00fcresel bi\u00e7imlerinden dolay\u0131 k\u00fcresel k\u00fcme ad\u0131 verilmi\u015ftir. Bunlar Samanyolu’nun olu\u015fumundan hemen sonra ortaya \u00e7\u0131kan, galaksim izdeki en eski yap\u0131lard\u0131r.<\/p>\n

Bir k\u00fcresel k\u00fcme ya\u015fland\u0131k\u00e7a, y\u0131ld\u0131zlar zamanla evrim ge\u00e7irir ve renkleri ve parlakl\u0131klar\u0131 de\u011fi\u015fir. \u00d6nce, en b\u00fcy\u00fck k\u00fctleli y\u0131ld\u0131zlar h idrojenlerini t\u00fcketerek k\u0131rm\u0131z\u0131 dev y\u0131ld\u0131zlara d\u00f6n\u00fc\u015f\u00fcr ve s\u00fcpernova olarak patlar. Zamanla, daha k\u00fc\u00e7\u00fck k\u00fctleli y\u0131ld\u0131zlar da \u00e7ekirdeksel yak\u0131tlar\u0131n\u0131 t\u00fcketir ve \u00f6l\u00fcr. G\u00fcn\u00fcm\u00fczde, Omega Erbo\u011fa gibi ya\u015fl\u0131 k\u00fcmelerde bulunan G\u00fcne\u015f benzeri y\u0131ld\u0131zlar \u00e7oktan k\u0131rm\u0131z\u0131 dev evresine girmi\u015ftir bile. Bu karakteristik evrimsel de\u011fi\u015fimler sayesinde, g\u00f6kbilimciler k\u00fcresel k\u00fcmelerin ya\u015f\u0131n\u0131 olduk\u00e7a ba\u015far\u0131l\u0131 bir bi\u00e7i mde hesaplayabiliyor. K\u00fcme olu\u015fmas\u0131 i\u00e7in ge\u00e7mesi gereken s\u00fcrenin k\u0131sa oldu\u011fu d\u00fc\u015f\u00fcn\u00fcld\u00fc\u011f\u00fcnden, en ya\u015fl\u0131 k\u00fcresel k\u00fcmelerin ya\u015f\u0131, t\u00fcm Samanyolu sisteminin kendisinin ya\u015f\u0131n\u0131 verir. Bu ya\u015f i\u00e7in en iyi tahmin on \u00fc\u00e7 milyar y\u0131l olup en d\u00fc\u015f\u00fck s\u0131n\u0131r on milyar, en y\u00fcksek s\u0131n\u0131r ise on sekiz milyar y\u0131ld\u0131r.<\/p>\n

Omega Erbo\u011fa’n\u0131n uzakl\u0131\u011f\u0131 yirmi bin \u0131\u015f\u0131k y\u0131l\u0131d\u0131r, Samanyolu’ndaki baz\u0131 k\u00fcresel k\u00fcmelerin uzakl\u0131\u011f\u0131 bunun be\u015f kat\u0131 kadard\u0131r. K\u00fcresel k\u00fcmeler, Samanyolu’nun \u00e7evresinde \u00e7ok b\u00fcy\u00fck ve kabaca k\u00fcresel bir hale
\nolu\u015fturur. Evrendeki bildi\u011fimiz en eski yap\u0131lar olan k\u00fcresel k\u00fcmeler, bize kendi galaksimizin ve di\u011fer galaksilerin nas\u0131l olu\u015ftu\u011fu konusunda \u00e7ok de\u011ferli bilgiler verir.<\/p>\n

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