{"id":47138,"date":"2020-11-23T08:49:33","date_gmt":"2020-11-23T05:49:33","guid":{"rendered":"https:\/\/bilimvegelecek.com.tr\/?p=47138"},"modified":"2020-11-23T08:50:52","modified_gmt":"2020-11-23T05:50:52","slug":"1963-yilinda-insa-edilen-arecibo-gozlemevi-dev-gozunu-yumuyor","status":"publish","type":"post","link":"https:\/\/bilimvegelecek.com.tr\/index.php\/2020\/11\/23\/1963-yilinda-insa-edilen-arecibo-gozlemevi-dev-gozunu-yumuyor","title":{"rendered":"1963 y\u0131l\u0131nda in\u015fa edilen Arecibo G\u00f6zlemevi dev g\u00f6z\u00fcn\u00fc yumuyor"},"content":{"rendered":"

Yar\u0131m as\u0131rdan daha uzun bir s\u00fcre \u00e7\u0131\u011f\u0131r a\u00e7\u0131c\u0131 pek \u00e7ok bilimsel \u00e7al\u0131\u015fmaya ev sahipli\u011fi yapm\u0131\u015f olan, Porto Riko\u2019nun simgele\u015fmi\u015f Arecibo G\u00f6zlemevi, ta\u015f\u0131y\u0131c\u0131 kablolar\u0131nda meydana gelen kritik hasarlar sonras\u0131 emekliye ayr\u0131l\u0131yor.<\/p>\n

Birle\u015fik Devletler Ulusal Bilim Vakf\u0131\u2019n\u0131n (NSF: National Science Foundation) 19 Kas\u0131m\u2019da yapt\u0131\u011f\u0131 duyuruda, 305 metrelik a\u00e7\u0131kl\u0131\u011fa sahip dev radyo teleskobun “kontroll\u00fc bir \u015fekilde hizmetten \u00e7\u0131kar\u0131laca\u011f\u0131” belirtildi. Karar\u0131n gerek\u00e7esi, teleskobun 900 tonluk merkezi al\u0131c\u0131 platformunu destekleyen kablolarda ge\u00e7ti\u011fimiz aylarda iki b\u00fcy\u00fck hasar\u0131n meydana gelmesi ve bu hasarlar\u0131n tamirinin i\u015f g\u00fcvenli\u011fi a\u00e7\u0131s\u0131ndan ciddi riskler bar\u0131nd\u0131rmas\u0131.<\/p>\n

Yap\u0131lan a\u00e7\u0131klamada, \u201cBirden \u00e7ok ba\u011f\u0131ms\u0131z m\u00fchendislik \u015firketi taraf\u0131ndan yap\u0131lm\u0131\u015f de\u011ferlendirmede, yap\u0131n\u0131n b\u00fcy\u00fck \u00e7apl\u0131 bir felaket tehdidiyle kar\u015f\u0131 kar\u015f\u0131ya oldu\u011fu ve yap\u0131y\u0131 ta\u015f\u0131maktan sorumlu kablolar\u0131n a\u011f\u0131rl\u0131\u011fa daha fazla dayanamayabilece\u011fi tespit edildi\u201d denildi. M\u00fchendislere g\u00f6re, herhangi bir tamir giri\u015fiminin i\u015f\u00e7ilerin ya\u015fam\u0131n\u0131 tehlikeye sokacak potansiyel tehlikeler bar\u0131nd\u0131rd\u0131\u011f\u0131 ve tamir ba\u015far\u0131l\u0131 bir \u015fekilde ger\u00e7ekle\u015ftirilse dahi yap\u0131n\u0131n b\u00fcy\u00fck ihtimalle uzun d\u00f6nemli denge problemleri ya\u015fayaca\u011f\u0131 belirtildi. M\u00fchendislerin yap\u0131n\u0131n tam olarak ne zaman \u00e7\u00f6kece\u011fini s\u00f6ylemesi m\u00fcmk\u00fcn olmad\u0131\u011f\u0131ndan, planlamalar\u0131n h\u0131zla tamamlanmas\u0131 gerekiyor.<\/p>\n

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Arecibo G\u00f6zlemevi\u2019nin hasar alm\u0131\u015f dev \u00e7ana\u011f\u0131n\u0131n havadan g\u00f6r\u00fcnt\u00fcs\u00fc Kaynak: Ricardo Arduengo (Getty Images)<\/figcaption><\/figure>\n

NSF\u2019nin Matematiksel ve Fiziksel Bilimler b\u00f6l\u00fcm\u00fcnde direkt\u00f6r yard\u0131mc\u0131s\u0131 olarak g\u00f6rev yapan Sean Jones bu karar\u0131n, \u201cBeklenmedik ve kontrols\u00fcz bir \u00e7\u00f6k\u00fc\u015f\u00fcn ya\u015fanmas\u0131 durumuna kar\u015f\u0131 insanlar\u0131n can g\u00fcvenli\u011fini korumak ve Arecibo G\u00f6zlemevi\u2019ni \u2013ziyaret\u00e7i e\u011fitim merkezi de dahil\u2013 t\u00fcm\u00fcyle kaybetmeyi \u00f6nlemek amac\u0131yla\u201d al\u0131nd\u0131\u011f\u0131n\u0131 s\u00f6yl\u00fcyor: \u201cBu, NSF i\u00e7in kolay bir karar olmad\u0131. Ancak insanlar\u0131n g\u00fcvenli\u011fi bizim birinci \u00f6nceli\u011fimizdir.\u201d<\/p>\n

Yak\u0131n ge\u00e7mi\u015fte meydana gelen do\u011fa olaylar\u0131 d\u00fc\u015f\u00fcn\u00fcl\u00fcrse, y\u0131llar\u0131n Arecibo\u2019ya nazik davranmad\u0131\u011f\u0131 \u015f\u00fcphesiz. Dev radyo teleskop 2017\u2019nin Ekim ay\u0131nda meydana gelen Maria Kas\u0131rgas\u0131\u2019ndan sert bir \u015fekilde etkilendi. Kas\u0131rga s\u0131ras\u0131nda iskelelerinden biri par\u00e7alan\u0131p d\u00fc\u015fen teleskobun, \u00e7ana\u011f\u0131nda yer alan 38 binden fazla al\u00fcminyum panel hasar ald\u0131. 2019 y\u0131l\u0131n\u0131n Aral\u0131k ay\u0131nda ise bir deprem ve \u00e7ok say\u0131da art\u00e7\u0131 sars\u0131nt\u0131 atlatt\u0131. Arecibo\u2019yu emekliye ay\u0131rtan a\u011f\u0131r kablo hasar\u0131n\u0131n bu olaylarla ilgisi olup olmad\u0131\u011f\u0131 bilinmiyor, ancak olas\u0131l\u0131k dahilindeler. Teleskop ge\u00e7ti\u011fimiz A\u011fustos ay\u0131nda yard\u0131mc\u0131 ta\u015f\u0131y\u0131c\u0131 kablolar\u0131ndan birini, Kas\u0131m ay\u0131nda ise ana ta\u015f\u0131y\u0131c\u0131 kablolar\u0131ndan birini kaybetti. \u0130ncelemeyi y\u00fcr\u00fcten m\u00fchendislerin belirtti\u011fine g\u00f6re, geriye kalan kablolar\u0131n ikisinde ise a\u015f\u0131r\u0131 a\u015f\u0131nma ve y\u0131pranmalar g\u00f6ze \u00e7arp\u0131yor. Bu kablolar\u0131n eskisinden de fazla y\u00fcke maruz kald\u0131\u011f\u0131 d\u00fc\u015f\u00fcn\u00fcl\u00fcrse, yap\u0131 m\u00fcdahale etmek i\u00e7in fazlas\u0131yla riskli.<\/p>\n

\"\"
Kas\u0131m Ay\u0131nda kopan ana ta\u015f\u0131y\u0131c\u0131 kablonun g\u00f6r\u00fcnt\u00fcs\u00fc (a\u015fa\u011f\u0131ya do\u011fru as\u0131l\u0131 duran). M\u00fchendisler kablonun tellerinin a\u015f\u0131nd\u0131\u011f\u0131n\u0131 fark etmi\u015flerdi. Kaynak: Merkez Florida \u00dcniversitesi<\/figcaption><\/figure>\n

Teleskobun hizmetten \u00e7\u0131kar\u0131lacak olmas\u0131na kar\u015f\u0131n Arecibo G\u00f6zlemevi b\u00fct\u00fcn\u00fcyle kapat\u0131lmayacak. NSF\u2019nin eylem plan\u0131 hen\u00fcz netle\u015fmemi\u015f olmakla birlikte, teleskopun \u00e7evresindeki tesislerin m\u00fcmk\u00fcn oldu\u011funca korunmas\u0131 ve bunlar\u0131n ara\u015ft\u0131rma ve e\u011fitim faaliyetlerinde kullan\u0131lmas\u0131 planlan\u0131yor.<\/p>\n

1963\u2019te in\u015fa edilen ve 305 metrelik a\u00e7\u0131kl\u0131\u011f\u0131yla uzun y\u0131llar D\u00fcnya\u2019n\u0131n en b\u00fcy\u00fck tek \u00e7anakl\u0131 radyo radar\u0131\/teleskopu olma unvan\u0131n\u0131 ta\u015f\u0131yan Arecibo (g\u00fcn\u00fcm\u00fczde \u00c7in\u2019in 500 metre a\u00e7\u0131kl\u0131\u011fa sahip FAST isimli radyo teleskobunun ard\u0131ndan ikincili\u011fi g\u00f6\u011f\u00fcsl\u00fcyor), ola\u011fand\u0131\u015f\u0131 boyutlar\u0131yla bilim insanlar\u0131na g\u00f6z\u00fc pek hedeflere ula\u015fma imk\u00e2n\u0131 sa\u011flad\u0131. Asteroid, kuyruklu y\u0131ld\u0131z ve gezegenlerin detayl\u0131 radar haritalar\u0131n\u0131n \u00e7\u0131kart\u0131lmas\u0131, h\u0131zla d\u00f6nen pulsarlar\u0131n (d\u00fczenli at\u0131mlarla uzaya radyo dalgalar\u0131 g\u00f6nderen n\u00f6tron y\u0131ld\u0131zlar\u0131) egzotik fizi\u011finin incelenmesi ve hatta d\u00fcnyad\u0131\u015f\u0131 ya\u015fam ara\u015ft\u0131rmalar\u0131n\u0131n (SETI) par\u00e7as\u0131 olarak uzay bo\u015flu\u011funa mesajlar g\u00f6nderilmesi Arecibo\u2019nun kullan\u0131ld\u0131\u011f\u0131 ara\u015ft\u0131rma sahalar\u0131ndan baz\u0131lar\u0131yd\u0131. 1974\u2019te ilk kez bir pulsar \u00e7ifti Arecibo arac\u0131l\u0131\u011f\u0131yla g\u00f6zlendi ve ka\u015fiflerine \u2013bu g\u00f6zlemleri \u00fczerine in\u015fa ettikleri ve genel g\u00f6relili\u011fi do\u011frulan kuramsal \u00e7\u0131kar\u0131mlar\u0131n dolay\u0131\u2013 Nobel Fizik \u00d6d\u00fcl\u00fc\u2019n\u00fc kazand\u0131rd\u0131. Benzer \u015fekilde, ilk milisaniye pulsar\u0131 (milisaniye mertebesinde periyotlar\u0131 olan pulsarlar) g\u00f6zlemine de 1982\u2019de Arecibo ev sahipli\u011fi yapt\u0131. 1992\u2019de ise bir pulsar etraf\u0131nda d\u00f6nen ilk \u00f6tegezegenler ke\u015ffedildi. Arecibo ayr\u0131ca, Birle\u015fik Devletlerin D\u00fcnya\u2019n\u0131n yak\u0131n\u0131ndaki asteroidleri izledi\u011fi (radar at\u0131mlar\u0131n\u0131n kayalardan geri sekme s\u00fcresi hesaplanarak mesafe \u00f6l\u00e7\u00fcm\u00fc yap\u0131l\u0131yordu) anahtar tesislerden biriydi. Her y\u0131l yakla\u015f\u0131k olarak 200 biliminsan\u0131 \u00e7al\u0131\u015fmalar\u0131nda Arecibo\u2019nun maharetlerinden yararlan\u0131yordu.<\/p>\n

Kaynaklar:<\/strong><\/p>\n

1) https:\/\/www.scientificamerican.com\/article\/arecibo-observatory-to-close-its-giant-eye-on-the-sky\/<\/p>\n

2) https:\/\/www.sciencemag.org\/news\/2020\/11\/famed-arecibo-telescope-brink-collapse-will-be-dismantled<\/p>\n

3) https:\/\/www.britannica.com\/topic\/Arecibo-Observatory<\/p>\n","protected":false},"excerpt":{"rendered":"

Yar\u0131m as\u0131rdan daha uzun bir s\u00fcre \u00e7\u0131\u011f\u0131r a\u00e7\u0131c\u0131 pek \u00e7ok bilimsel \u00e7al\u0131\u015fmaya ev sahipli\u011fi yapm\u0131\u015f olan, Porto Riko\u2019nun simgele\u015fmi\u015f Arecibo G\u00f6zlemevi, ta\u015f\u0131y\u0131c\u0131 kablolar\u0131nda meydana gelen kritik hasarlar sonras\u0131 emekliye ayr\u0131l\u0131yor. Birle\u015fik Devletler Ulusal Bilim Vakf\u0131\u2019n\u0131n (NSF: National Science Foundation) 19 Kas\u0131m\u2019da yapt\u0131\u011f\u0131 duyuruda, 305 metrelik a\u00e7\u0131kl\u0131\u011fa sahip dev radyo teleskobun “kontroll\u00fc bir \u015fekilde hizmetten \u00e7\u0131kar\u0131laca\u011f\u0131” […]<\/p>\n","protected":false},"author":677,"featured_media":47141,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[19],"tags":[7089,6646,7090,1845],"class_list":["post-47138","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-bilim-gundemi","tag-arecibo-gozlemevi","tag-hasar","tag-kasirga","tag-teleskop"],"acf":[],"aioseo_notices":[],"aioseo_head":"\n\t\t\n\t\n\t\n\t\n\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t