{"id":14742,"date":"2024-12-23T10:38:47","date_gmt":"2024-12-23T07:38:47","guid":{"rendered":"https:\/\/kibrisayna.com\/index.php\/2024\/12\/23\/13-milyar-yillik-sir-ortaya-cikti-erken-evrenin-gezegenleri-nasil-olustu\/"},"modified":"2024-12-23T10:38:47","modified_gmt":"2024-12-23T07:38:47","slug":"13-milyar-yillik-sir-ortaya-cikti-erken-evrenin-gezegenleri-nasil-olustu","status":"publish","type":"post","link":"https:\/\/kibrisayna.com\/index.php\/2024\/12\/23\/13-milyar-yillik-sir-ortaya-cikti-erken-evrenin-gezegenleri-nasil-olustu\/","title":{"rendered":"13 milyar y\u0131ll\u0131k s\u0131r ortaya \u00e7\u0131kt\u0131: Erken evrenin gezegenleri nas\u0131l olu\u015ftu?"},"content":{"rendered":"


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\"13<\/p>\n

James Webb Uzay Teleskobu (JWST), antik y\u0131ld\u0131zlar\u0131n nas\u0131l dev gezegenlere ev sahipli\u011fi yapabildi\u011fine dair 13 milyar y\u0131ll\u0131k s\u0131rr\u0131 \u00e7\u00f6zd\u00fc. Bilim insanlar\u0131, 2000’lerin ba\u015f\u0131nda Hubble Teleskobunu kullanarak, evrenin do\u011fumundan yaln\u0131zca bir milyar y\u0131l sonra olu\u015fmu\u015f, J\u00fcpiter’den 2,5 kat b\u00fcy\u00fck bir gezegen ke\u015ffemi\u015fti. JWST, hafif elementlerden olu\u015fan y\u0131ld\u0131zlar\u0131n \u00e7evresindeki toz disklerinin beklenenden daha uzun s\u00fcre dayanabilece\u011fini g\u00f6sterdi. Bu ke\u015fif, a\u011f\u0131r elementlerin az oldu\u011fu erken evrende gezegen olu\u015fumuna dair teorileri alt\u00fcst etti.<\/p>\n

\n
2000’lerin ba\u015f\u0131nda, Hubble Uzay Teleskobu, Samanyolu’nda yakla\u015f\u0131k 13 milyar y\u0131l \u00f6nce olu\u015fmu\u015f, J\u00fcpiter’den 2,5 kat b\u00fcy\u00fck olan ve \u015fimdiye kadar ke\u015ffedilen en eski gezegeni g\u00f6zlemledi.
\nBu gezegen, evrenin do\u011fumundan yaln\u0131zca bir milyar y\u0131l sonra ortaya \u00e7\u0131km\u0131\u015ft\u0131. K\u0131sa s\u00fcre i\u00e7inde di\u011fer eski gezegenlerin ke\u015ffi de ger\u00e7ekle\u015fti.
\nAncak bu durum bilim insanlar\u0131n\u0131 \u015fa\u015fk\u0131na \u00e7evirdi \u00e7\u00fcnk\u00fc erken evrende olu\u015fan y\u0131ld\u0131zlar\u0131n \u00e7o\u011funlukla hafif elementlerden, yani hidrojen ve helyumdan olu\u015fmas\u0131 bekleniyordu.<\/figcaption><\/figure>\n
Gezegenleri olu\u015fturan karbon ve demir gibi a\u011f\u0131r elementler ise neredeyse hi\u00e7 mevcut de\u011fildi.
\nAstronomlar, bu hafif elementlerden olu\u015fan y\u0131ld\u0131zlar\u0131n \u00e7evresindeki toz ve gaz disklerinin y\u0131ld\u0131z\u0131n kendi radyasyonu taraf\u0131ndan birka\u00e7 milyon y\u0131l i\u00e7inde da\u011f\u0131t\u0131lmas\u0131 gerekti\u011fini d\u00fc\u015f\u00fcn\u00fcyorlard\u0131.
\nB\u00f6ylece geriye bir gezegen olu\u015fturacak malzeme kalm\u0131yordu.
\nO d\u00f6nem bilim insanlar\u0131, y\u0131ld\u0131zlar\u0131n \u00e7evresinde uzun \u00f6m\u00fcrl\u00fc bir gezegen diski olu\u015fturmak i\u00e7in gereken a\u011f\u0131r elementlerin ancak daha sonraki s\u00fcpernova patlamalar\u0131yla olu\u015fabilece\u011fini \u00f6ne s\u00fcr\u00fcyordu.<\/figcaption><\/figure>\n
Ancak JWST, bu eski y\u0131ld\u0131zlara benzer modern y\u0131ld\u0131zlar\u0131 yak\u0131ndan inceledi ve Hubble’\u0131n yan\u0131lmad\u0131\u011f\u0131n\u0131 kan\u0131tlad\u0131.
\nThe Astrophysical Journal’da yay\u0131mlanan yeni bir ara\u015ft\u0131rmaya g\u00f6re, a\u011f\u0131r metalik elementlerin az oldu\u011fu durumlarda gezegen disklerinin daha \u00f6nce d\u00fc\u015f\u00fcn\u00fcld\u00fc\u011f\u00fcnden \u00e7ok daha uzun s\u00fcre dayanabilece\u011fi ortaya \u00e7\u0131kt\u0131.<\/figcaption><\/figure>\n
Avrupa Uzay Ara\u015ft\u0131rma ve Teknoloji Merkezi\u2019nden astronom Guido De Marchi, \u201cBu y\u0131ld\u0131zlar\u0131n ger\u00e7ekten de disklerle \u00e7evrili oldu\u011funu ve hatta nispeten ileri bir ya\u015f olan 20 ila 30 milyon y\u0131lda bile malzeme \u00e7ekmeye devam ettiklerini g\u00f6r\u00fcyoruz. Bu da, bu y\u0131ld\u0131zlar\u0131n etraf\u0131nda gezegenlerin olu\u015fmas\u0131 ve b\u00fcy\u00fcmesi i\u00e7in bizim galaksimizdeki yak\u0131n y\u0131ld\u0131z olu\u015fum b\u00f6lgelerine k\u0131yasla daha fazla zaman oldu\u011fu anlam\u0131na geliyor.\u201d dedi.<\/figcaption><\/figure>\n
JWST, NGC 346 ad\u0131 verilen bir y\u0131ld\u0131z olu\u015fum k\u00fcmesindeki y\u0131ld\u0131zlar\u0131n tayf\u0131n\u0131 (farkl\u0131 \u0131\u015f\u0131k dalga boylar\u0131n\u0131n \u00f6l\u00e7\u00fcm\u00fc) inceledi.
\nBu k\u00fcmenin ko\u015fullar\u0131, hidrojen ve helyum gibi hafif elementlerin bol oldu\u011fu ve metalik veya di\u011fer a\u011f\u0131r elementlerin nispeten az oldu\u011fu erken evrendeki ko\u015fullara benziyor.
\nBu k\u00fcme, D\u00fcnya\u2019dan 199 bin\u00a0\u0131\u015f\u0131k y\u0131l\u0131 uzakl\u0131kta bulunan K\u00fc\u00e7\u00fck Macellan Bulutu adl\u0131 galakside yer al\u0131yor.<\/figcaption><\/figure>\n
Bu y\u0131ld\u0131zlardan ve \u00e7evrelerinden yay\u0131lan \u0131\u015f\u0131k ve elektromanyetik dalgalar, uzun \u00f6m\u00fcrl\u00fc gezegen disklerine ev sahipli\u011fi yapt\u0131klar\u0131n\u0131 ortaya \u00e7\u0131kard\u0131.
\nHafif elementlerden olu\u015fan y\u0131ld\u0131zlar, radyoaktif bozunmaya u\u011frayan a\u011f\u0131r elementlerden neredeyse hi\u00e7 bar\u0131nd\u0131rmaz.
\nBu radyoaktif elementlerin eksikli\u011fi, y\u0131ld\u0131z\u0131n gezegen diskini itmek i\u00e7in daha az g\u00fcce sahip olmas\u0131 anlam\u0131na gelir.<\/figcaption><\/figure>\n
Bu nedenle, bu y\u0131ld\u0131zlar\u0131n etraf\u0131ndaki diskler, daha a\u011f\u0131r elementler i\u00e7eren y\u0131ld\u0131zlar\u0131n \u00e7evresindeki disklerden \u00e7ok daha uzun s\u00fcre dayanabilir.
\nSadece hafif elementlerden olu\u015fan bir y\u0131ld\u0131z\u0131n, \u00e7ok b\u00fcy\u00fck bir toz ve gaz bulutundan olu\u015fmas\u0131 gerekir.
\nBu ekstra b\u00fcy\u00fck toz bulutu, yeni olu\u015fan y\u0131ld\u0131z\u0131n \u00e7evresinde devasa bir disk b\u0131rak\u0131r ve bu disk, hafif elementlerden olu\u015fan y\u0131ld\u0131zlar a\u011f\u0131r elementli y\u0131ld\u0131zlar kadar radyasyon yaym\u0131\u015f olsa bile, da\u011f\u0131lmas\u0131 \u00e7ok uzun s\u00fcrebilir.<\/figcaption><\/figure>\n
\u00c7al\u0131\u015fman\u0131n ortak yazar\u0131\u00a0Elena Sabbi \u00a0\u201cBu ke\u015fif, bir gezegenin nas\u0131l olu\u015ftu\u011fu ve bu farkl\u0131 ortamlarda hangi t\u00fcr sistem mimarilerinin var olabilece\u011fi konusunda \u00f6nemli sonu\u00e7lara yol a\u00e7\u0131yor. Bu ger\u00e7ekten \u00e7ok heyecan verici.\u201d diye konu\u015ftu.
\nJames Webb Uzay Teleskobu\u2019nun bu ke\u015ffi, erken evrenin ko\u015fullar\u0131nda gezegen olu\u015fumunu anlamam\u0131zda devrim niteli\u011finde bir ad\u0131m atmam\u0131z\u0131 sa\u011flad\u0131 ve g\u00f6kbilimcilerin y\u0131ld\u0131z sistemlerinin mimarisini yeniden de\u011ferlendirmesine olanak tan\u0131d\u0131.<\/figcaption><\/figure>\n
<\/figure>\n<\/section>\n


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James Webb Uzay Teleskobu (JWST), antik y\u0131ld\u0131zlar\u0131n nas\u0131l dev gezegenlere ev sahipli\u011fi yapabildi\u011fine dair 13 milyar y\u0131ll\u0131k s\u0131rr\u0131 \u00e7\u00f6zd\u00fc. Bilim insanlar\u0131, 2000’lerin ba\u015f\u0131nda Hubble Teleskobunu kullanarak, evrenin do\u011fumundan yaln\u0131zca bir milyar y\u0131l sonra olu\u015fmu\u015f, J\u00fcpiter’den 2,5 kat b\u00fcy\u00fck bir gezegen ke\u015ffemi\u015fti. JWST, hafif elementlerden olu\u015fan y\u0131ld\u0131zlar\u0131n \u00e7evresindeki toz disklerinin beklenenden daha uzun s\u00fcre dayanabilece\u011fini g\u00f6sterdi. […]<\/p>\n","protected":false},"author":908,"featured_media":14743,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_publicize_message":"","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":true,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"font":"","enabled":false},"version":2}},"categories":[12],"tags":[],"class_list":["post-14742","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-teknoloji"],"jetpack_publicize_connections":[],"jetpack_featured_media_url":"https:\/\/kibrisayna.com\/wp-content\/uploads\/2024\/12\/2dwJJPTzAkmwoRW5o7Pbug.jpg","jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/kibrisayna.com\/index.php\/wp-json\/wp\/v2\/posts\/14742","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/kibrisayna.com\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/kibrisayna.com\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/kibrisayna.com\/index.php\/wp-json\/wp\/v2\/users\/908"}],"replies":[{"embeddable":true,"href":"https:\/\/kibrisayna.com\/index.php\/wp-json\/wp\/v2\/comments?post=14742"}],"version-history":[{"count":0,"href":"https:\/\/kibrisayna.com\/index.php\/wp-json\/wp\/v2\/posts\/14742\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/kibrisayna.com\/index.php\/wp-json\/wp\/v2\/media\/14743"}],"wp:attachment":[{"href":"https:\/\/kibrisayna.com\/index.php\/wp-json\/wp\/v2\/media?parent=14742"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/kibrisayna.com\/index.php\/wp-json\/wp\/v2\/categories?post=14742"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/kibrisayna.com\/index.php\/wp-json\/wp\/v2\/tags?post=14742"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}