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James Webb Uzay Teleskobu 'Selfie' Çekti - HAKANSEYHAN
İnsanların şimdiye kadar inşa etmiş olduğu en karmaşık yapılardan önde gelen James Webb Uzay Teleskobu’ndan yeni haberler gelmeye devam ediyor. Meydana getirilen son açıklamalarda teleskobun hem ‘selfie’ çekmiş olduğu, hem de ilk kez bir yıldızı fotoğrafladığı bildirildi.
24 Aralık 2021 tarihinde evrenin en karanlık sırlarına ışık tutmak adına uzaya fırlatılan James Webb Uzay Teleskobu ’ndan gelen her yeni haberle beraber coşku artmaya devam ediyor. Bir aylık yolculuğun peşinden 18 gün ilkin gözlem noktasına ulaşan James Webb Uzay Teleskobu, bundan 6 gün öncesinde de ilk yıldız sinyalini tespit etmiş ve bunun hemen hemen yalnız bir başlangıç bulunduğunu bizlere hissettirmişti.
Bu gelişmelerin peşinden NASA, Webb’in cuma günü bir ‘selfie’ çektiğini bildirdi. Buna ek olarak teleskobun ilk yıldızın ı da görmüş olduğu kaydedildi.
James Webb Uzay Teleskobu’nun selfie çekmesi, Webb ekibini büyüledi
NASA daha ilkin yapmış olduğu açıklamalarda teleskobun selfie çekmesinin mümkün olmadığını söylemiş olsa da görünen o ki teleskop hayranlarını şımartmaya karar vermiş benzer biçimde duruyor. Webb ekibinin yalnızca yıldız ışığını kullanarak bu şekilde bir görüntü elde etmenin mümkün olup olmadığından daha ilkin güvenli olmadığını kaydeden Webb optik teleskop eleman yöneticisi Lee Feinberg, yapmış olduğu açıklamada Webb’in selfie çekmesine verdikleri tepkinin “Aman Tanrım” bulunduğunu ifade ediyor.
“Houston’da kontrol ettiğimizde bile, bu konfigürasyondaki ana aynayı aydınlatan yıldız ışığına haiz değildik.” şeklinde aktaran Feinberg, bu durumun ekip için de yeni bir şey bulunduğunu ve ekibin gelişme karşısında adeta büyülendiğini de sözlerine ekliyor.
Webb, ilk yıldızının da fotoğrafını çekti
Tüm bunların yanında Webb, ilk yıldız görüntülerini de elde etti. Meydana getirilen açıklamada tüm bu adımların, bu yaza kadar evrenin tarihinin gizemlerini çözmeye başlayacağına inanılan teleskobun devasa altın aynasını hizalamaya yönelik aylarca devam eden sürecin bir parçası olduğu açıklandı. Öte taraftan Webb’in evrenden Dünya’ya gönderilmiş olduğu ilk görsel, görüntüde pek de etkisi altına alan olmasa da insanlık için geleceğe dair vadettikleri açısından oldukça çarpıcı.
Siyah bir arka plan üstünde 18 bulanık beyaz noktanın olduğu görselde aslen her bir nokta aynı şeyi gösteriyor: Büyük Ayı takımyıldızında parlak, izole bir yıldız olan HD84406 . Bu fotoğraf, hepimiz için aslen oldukça mühim bir kilometre taşını temsil ediyor. Birincil aynanın 18 ayrı parçası tarafınca yakalanan 18 noktanın olduğu görsel, artık bu altıgen parçaları hizalamak ve odaklamaları için bilim adamlarına bir temel oluşturuyor.
13,5 milyar yıl geriye giderek ilk galaksileri inceleyecek
Webb tarafınca tespit edilen ışık, segmentlerden geçerek teleskobun ucunda bulunan yuvarlak bir nesne olan ikincil aynasına ve peşinden da ana görüntüleme aleti olan Yakın Kızılötesi Kamera (NIRCam) aletine yansıyor. NIRCam aletinin baş araştırmacısı olan Arizona Üniversitesi’nden astronomi profesörü Marcia Rieke yapmış olduğu açıklamada, görüntü almanın ve teleskopu hizalamanın ilk adımlarının bu aşama iyi ilerlemesi karşısında tüm Webb ekibinin mutluluktan adeta kendinden geçmiş bulunduğunu ifade ediyor.
Webb’in yıldızın tahmin edilen konumu çevresinde değişik konumları işaret etmesiyle 2 Şubat günü başlamış olan görüntü soruşturma sürecinde gelinen nokta, teleskobun nihai hizalanma için aslına bakarsan nispeten iyi konumlandırılmış durumda bulunduğunu da gösteriyor. Yukarıda bahsettiğimiz selfie’nin de bu sürece yardım etmek amacıyla çekilmiş olduğu belirtiliyor.
İLGİLİ HABER
James Webb Uzay Teleskobu’nun Yörünge Yolculuğu Başladı: İşte Teleskop Hakkında Bilinmesi Gerekenler Webb’in Büyük Patlama’dan (Big Bang) sonrasında oluşan ilk nesil galaksilere ulaşmak adına 13,5 milyar yıl geriye gitmek için yüksek çözünürlüğünde olan araçlarını kullanmayı kapsayan aslolan görevi ise önümüzdeki yazları başlamış olacak. Buna ek olarak Webb; kökenlerini, evrimlerini ve yaşanabilirliklerini saptamak amacıyla dış gezegenler olarak malum uzak gezegenleri de inceleyecek.
Kaynak :
https://www.sciencealert.com/this-is-the-james-webb-space-telescope-s-first-ever-photograph-of-a-star
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