{"id":1569,"date":"2026-05-07T15:00:12","date_gmt":"2026-05-07T12:00:12","guid":{"rendered":"https:\/\/blog.metu.edu.tr\/caglart\/?p=1569"},"modified":"2026-05-07T15:02:08","modified_gmt":"2026-05-07T12:02:08","slug":"bir-minik-kusku","status":"publish","type":"post","link":"https:\/\/blog.metu.edu.tr\/caglart\/2026\/05\/07\/bir-minik-kusku\/","title":{"rendered":"Bir minik ku\u015fku!"},"content":{"rendered":"

Astronomlar (#1) uzay\u0131n, bizden her y\u00f6nde ve her uzakl\u0131kta t\u0131pat\u0131p ayn\u0131 (‘isotropic and uniform’) oldu\u011fu kan\u0131s\u0131ndad\u0131r. Bu kan\u0131y\u0131 destekleyen pek \u00e7ok deney ve g\u00f6zlem mevcuttur. Ama, bunlar\u0131n t\u00fcm\u00fc bize yak\u0131n uzay b\u00f6lgelerinde, eni konu G\u00fcne\u015f Sistemi i\u00e7inde yap\u0131lm\u0131\u015ft\u0131r.<\/p>\n

Uzay\u0131n bizden uzak yerleri de b\u00f6yle midir acaba? \u00d6rne\u011fin, en uzaklardaki \u0131\u015f\u0131k h\u0131z\u0131 ne kadard\u0131r? Dahas\u0131, oralarda da sabit midir? Bilmiyoruz. B\u00f6yle oldu\u011funu san\u0131yoruz veya varsay\u0131yoruz. Ama \u0131\u015f\u0131\u011f\u0131n su i\u00e7inde ve cam i\u00e7inde daha d\u00fc\u015f\u00fck h\u0131zla hareket etti\u011fini biliyoruz. (#2)<\/p>\n

Konumuzun bu a\u015famas\u0131 \u015fu iki nedenle \u00f6nemlidir. \u0130lkin, hani “Deney ve tam Bilim” ba\u015fl\u0131kl\u0131 yaz\u0131da (#3) “Einstein kuram\u0131nca G\u00fcne\u015f\u2019in uzay\u0131 b\u00fckerek arkas\u0131ndaki bir y\u0131ld\u0131zdan gelen \u0131\u015f\u0131\u011f\u0131 \u00e7ekti\u011fi de ka\u00e7 kez g\u00f6zlemlenmi\u015ftir?” diye sormu\u015ftuk ya; i\u015fte bu sorunun yan\u0131t\u0131 “Bir kez yeter!” olabilir, e\u011fer uzay\u0131n her b\u00f6lgesi t\u0131pat\u0131p bir ba\u015fka b\u00f6lgesi ile ayn\u0131 ise. Yani, “Burada olan t\u0131pat\u0131p orada (da) oluyordur.” g\u00f6r\u00fc\u015f\u00fc kabul edilebilir, bu ko\u015ful alt\u0131nda.
\nBu hususla ilgili m\u00fchim bir ayr\u0131nt\u0131 \u015fudur: Bizim \u00e7evremizdeki evrensel k\u00fctle yo\u011funlu\u011fu ortalamas\u0131 bir metre k\u00fcpl\u00fck hacim ba\u015f\u0131na bir iki Hidrojen atomunun k\u00fctlesine denktir. (#4) \u0130\u015fte bu ortalama yo\u011funlu\u011fun evrenin her yerinde ayn\u0131 olup olmad\u0131\u011f\u0131n\u0131 bilmiyoruz ki, \u00f6rne\u011fin en basitinden, bu yo\u011funluk de\u011fi\u015fiklik g\u00f6steriyorsa \u0131\u015f\u0131k h\u0131z\u0131 da de\u011fi\u015fiklik g\u00f6steriyor olabilir.<\/p>\n

\u0130kincileyin; evrenin t\u00fcm\u00fcyle, say\u0131s\u0131 yakla\u015f\u0131k 100 kadar olan<\/p>\n

\"\"<\/a><\/p>\n

atomlardan yap\u0131l\u0131 oldu\u011funu san\u0131yoruz. Kald\u0131 ki, \u00f6rne\u011fin atom numaras\u0131 92 olan Uranyum ve ona kom\u015fu pek \u00e7ok element \u0131\u015f\u0131letkindir ve \u00e7abucak bozunur. Yine de, en fazlas\u0131 100 kadar atomun evrendeki bunca de\u011fi\u015fikli\u011fin ana maddesi oldu\u011fundan ku\u015fkulanmak yersiz midir?<\/p>\n

(#1) Astronom, Astronomi ile u\u011fra\u015fan ki\u015fi; Astronomi de G\u00f6k Adland\u0131rmak anlam\u0131ndad\u0131r.
\n(#2) https:\/\/www.google.com\/search?q=%C4%B1%C5%9F%C4%B1%C4%9F%C4%B1n+sudaki+ve+camdaki+h%C4%B1z%C4%B1&rlz=1C1CHBF_enTR1209TR1209&oq=%C4%B1%C5%9F%C4%B1%C4%9F%C4%B1n+sudaki+ve+camdaki+h%C4%B1z%C4%B1&gs_lcrp=EgZjaHJvbWUyBggAEEUYOTIKCAEQABiABBiiBDIHCAIQABjvBTIHCAMQABjvBTIHCAQQABjvBTIKCAUQABiABBiiBNIBCTEwMDY2ajBqN6gCCLACAfEFlOoaoWkgpOU&sourceid=chrome&ie=UTF-8
\n(#3) https:\/\/blog.metu.edu.tr\/caglart\/2026\/05\/02\/deney-ve-tam-bilim\/
\n(#4) https:\/\/www.google.com\/search?q=evrenin+k%C3%BCtle+yo%C4%9Funlu%C4%9Fu&rlz=1C1CHBF_enTR1209TR1209&oq=evrenin+k%C3%BCtle+yo%C4%9Funlu%C4%9Fu&gs_lcrp=EgZjaHJvbWUyBggAEEUYOTIHCAEQIRigATIHCAIQIRigATIHCAMQIRiPAjIHCAQQIRiPAtIBCTEwMTIyajBqN6gCALACAA&sourceid=chrome&ie=UTF-8
\nAyr\u0131ca;
\nhttps:\/\/www.google.com\/search?q=proton+k%C3%BCtlesi&rlz=1C1CHBF_enTR1209TR1209&oq=proton+k%C3%BCtlesi&gs_lcrp=EgZjaHJvbWUyCQgAEEUYORiABDIICAEQABgWGB4yCAgCEAAYFhgeMggIAxAAGBYYHjIICAQQABgWGB4yCAgFEAAYFhgeMggIBhAAGBYYHjIICAcQABgWGB4yCAgIEAAYFhgeMgoICRAAGAoYFhge0gEINjU4MWowajeoAgCwAgA&sourceid=chrome&ie=UTF-8<\/p>\n","protected":false},"excerpt":{"rendered":"

Astronomlar (#1) uzay\u0131n, bizden her y\u00f6nde ve her uzakl\u0131kta t\u0131pat\u0131p ayn\u0131 (‘isotropic and uniform’) oldu\u011fu kan\u0131s\u0131ndad\u0131r. Bu kan\u0131y\u0131 destekleyen pek \u00e7ok deney ve g\u00f6zlem mevcuttur. Ama, bunlar\u0131n t\u00fcm\u00fc bize yak\u0131n uzay b\u00f6lgelerinde, eni konu G\u00fcne\u015f Sistemi i\u00e7inde yap\u0131lm\u0131\u015ft\u0131r. Uzay\u0131n bizden uzak yerleri de b\u00f6yle midir acaba? \u00d6rne\u011fin, en uzaklardaki \u0131\u015f\u0131k h\u0131z\u0131 ne kadard\u0131r? Dahas\u0131, oralarda […]<\/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-1569","post","type-post","status-publish","format-standard","hentry","category-genel"],"_links":{"self":[{"href":"https:\/\/blog.metu.edu.tr\/caglart\/wp-json\/wp\/v2\/posts\/1569","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=1569"}],"version-history":[{"count":0,"href":"https:\/\/blog.metu.edu.tr\/caglart\/wp-json\/wp\/v2\/posts\/1569\/revisions"}],"wp:attachment":[{"href":"https:\/\/blog.metu.edu.tr\/caglart\/wp-json\/wp\/v2\/media?parent=1569"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/blog.metu.edu.tr\/caglart\/wp-json\/wp\/v2\/categories?post=1569"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/blog.metu.edu.tr\/caglart\/wp-json\/wp\/v2\/tags?post=1569"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}