Evren (her y\u00f6nde) geni\u015fliyor olabilir. Yeg\u00e2ne sebep olarak da uzak galaksilerden gelen \u0131\u015f\u0131ktaki k\u0131z\u0131la kay\u0131\u015f (\u2018red shift\u2019) yani frekanslarda k\u00fc\u00e7\u00fcl\u00fc\u015f ve dolay\u0131s\u0131 ile dalga boylar\u0131ndaki b\u00fcy\u00fcy\u00fc\u015f g\u00f6sterilmektedir. Hani, yakla\u015fan trenin d\u00fcd\u00fc\u011f\u00fcn\u00fcn sesi incelir (tizle\u015fir) ve uzakla\u015fan\u0131nki kal\u0131nla\u015f\u0131r (basla\u015f\u0131r) ya, tam da bu mis\u00e2l i\u015fte! Hatta, gecelerin karanl\u0131k olu\u015funun sebebini de evren geni\u015flemesine dayand\u0131ranlar vard\u0131r. (*)<\/p>\n
(*) Burada, h\u0131za ba\u011f\u0131l zaman yava\u015flamas\u0131 temel mekanizmad\u0131r.<\/p>\n
E\u015fy\u00f6nl\u00fc (‘isotropic’) ve dura\u011fan (\u2018static\u2019) evren modelinde her y\u00f6ndeki e\u015fit g\u00f6k alanlar\u0131ndan e\u015fit miktarda \u0131\u015f\u0131k gelmesi gerekti\u011fi varsay\u0131m\u0131 ile, G\u00fcne\u015f\u2019in \u00f6rtmedi\u011fi g\u00f6k alanlar\u0131 da G\u00fcne\u015f denli parlak olmal\u0131d\u0131r. T\u0131pk\u0131, bir ormanda a\u011fa\u00e7lar\u0131n (g\u00f6vde kal\u0131nl\u0131klar\u0131na ba\u011f\u0131l olarak) bir mesafeden sonraki g\u00f6r\u00fc\u015f\u00fc engelleyi\u015fi gibi. Her tarafta (a\u015fa\u011f\u0131s\u0131 ve yukar\u0131s\u0131 hari\u00e7 elbette) ayn\u0131 yo\u011funlukta a\u011fa\u00e7 g\u00f6r\u00fclecektir. \u00c7\u00fcnk\u00fc, uzaktaki a\u011fa\u00e7 g\u00f6vdeleri ince g\u00f6r\u00fcnse bile, o uzakl\u0131kta yak\u0131ndakilere k\u0131yasla daha \u00e7ok say\u0131da g\u00f6vde g\u00f6r\u00fcnecektir.<\/p>\n
\u0130\u015fte, gecelerin karanl\u0131k olmamas\u0131 gerekti\u011fi fikri de her y\u00f6nden e\u015fit y\u0131ld\u0131z parlakl\u0131\u011f\u0131 g\u00f6r\u00fcnmesi gerekti\u011fi fikrine dayand\u0131r\u0131lmaktad\u0131r.<\/p>\n
Gelgelelim, y\u0131ld\u0131zlar uzayda e\u015fy\u00f6nl\u00fc da\u011f\u0131l\u0131m sergilese bile, evren geni\u015fledi\u011fi i\u00e7in, k\u0131z\u0131la kayma nedeniyle yeni g\u00f6r\u00fcn\u00fcr olan y\u0131ld\u0131zlar\u0131n say\u0131s\u0131 g\u00f6r\u00fcnmez olanlardan \u00e7ok daha az olacakt\u0131r. Bu e\u015fitsizlik de gecelerin (yani, asl\u0131nda uzay\u0131n) karanl\u0131k olu\u015funun sebebi olarak ileri s\u00fcr\u00fclmektedir.<\/p>\n
Evrenin Karacisim I\u015f\u0131mas\u0131 (‘Blackbody Radiation’) 3,4 Kelvin yani -230 Celsius dolay\u0131ndad\u0131r.<\/p>\n
Devam\u0131 var : Evren (her y\u00f6nde) geni\u015fliyor ol_MAY_abilir.<\/p>\n","protected":false},"excerpt":{"rendered":"
Evren (her y\u00f6nde) geni\u015fliyor olabilir. Yeg\u00e2ne sebep olarak da uzak galaksilerden gelen \u0131\u015f\u0131ktaki k\u0131z\u0131la kay\u0131\u015f (\u2018red shift\u2019) yani frekanslarda k\u00fc\u00e7\u00fcl\u00fc\u015f ve dolay\u0131s\u0131 ile dalga boylar\u0131ndaki b\u00fcy\u00fcy\u00fc\u015f g\u00f6sterilmektedir. Hani, yakla\u015fan trenin d\u00fcd\u00fc\u011f\u00fcn\u00fcn sesi incelir (tizle\u015fir) ve uzakla\u015fan\u0131nki kal\u0131nla\u015f\u0131r (basla\u015f\u0131r) ya, tam da bu mis\u00e2l i\u015fte! Hatta, gecelerin karanl\u0131k olu\u015funun sebebini de evren geni\u015flemesine dayand\u0131ranlar vard\u0131r. (*) […]<\/p>\n","protected":false},"author":1425,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":"","_links_to":"","_links_to_target":""},"categories":[1],"tags":[],"class_list":["post-1165","post","type-post","status-publish","format-standard","hentry","category-genel"],"_links":{"self":[{"href":"https:\/\/blog.metu.edu.tr\/caglart\/wp-json\/wp\/v2\/posts\/1165","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/blog.metu.edu.tr\/caglart\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/blog.metu.edu.tr\/caglart\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/blog.metu.edu.tr\/caglart\/wp-json\/wp\/v2\/users\/1425"}],"replies":[{"embeddable":true,"href":"https:\/\/blog.metu.edu.tr\/caglart\/wp-json\/wp\/v2\/comments?post=1165"}],"version-history":[{"count":0,"href":"https:\/\/blog.metu.edu.tr\/caglart\/wp-json\/wp\/v2\/posts\/1165\/revisions"}],"wp:attachment":[{"href":"https:\/\/blog.metu.edu.tr\/caglart\/wp-json\/wp\/v2\/media?parent=1165"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/blog.metu.edu.tr\/caglart\/wp-json\/wp\/v2\/categories?post=1165"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/blog.metu.edu.tr\/caglart\/wp-json\/wp\/v2\/tags?post=1165"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}