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![\"Ven\u00fcs'\u00fcn](\"https:\/\/cdn1.ntv.com.tr\/gorsel\/z7momTyGhUyW9hjsflpZiA.jpg?width=1200&mode=crop&scale=both\")
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Bilim insanlar\u0131, Ven\u00fcs’\u00fcn y\u00fczeyinde bulunan devasa dairesel yap\u0131lar\u0131n s\u0131rr\u0131n\u0131\u00a0\u00e7\u00f6zmeye \u00e7ok yakla\u015ft\u0131.<\/p>\n
Ven\u00fcs\u2019\u00fcn y\u00fczeyi, y\u00fczlerce kilometre \u00e7ap\u0131na ula\u015fabilen, hatta baz\u0131lar\u0131 bin kilometreyi a\u015fan devasa dairesel yap\u0131larla kapl\u0131. D\u00fcnya\u2019da e\u015fi g\u00f6r\u00fclmeyen ve ‘koronae’ ad\u0131 verilen bu olu\u015fumlar\u0131n k\u00f6keni, uzun y\u0131llard\u0131r bilim insanlar\u0131 taraf\u0131ndan ara\u015ft\u0131r\u0131l\u0131yordu. Proceedings of the National Academy of Sciences dergisinde yay\u0131mlanan yeni bir ara\u015ft\u0131rma, bu gizemi a\u00e7\u0131klayabilecek \u00f6nemli bir ipucu sundu. \u00c7al\u0131\u015fmaya g\u00f6re, koronae’ler Ven\u00fcs\u2019\u00fcn mantosundan y\u00fckselen s\u0131cak kaya\u00e7 \u201cbaloncuklar\u0131\u201dn\u0131n y\u00fczeye ula\u015fmaya \u00e7al\u0131\u015f\u0131rken tak\u0131ld\u0131klar\u0131 bir tabaka nedeniyle olu\u015fuyor.<\/p>\n
Bilim insanlar\u0131n\u0131n modellemelerine g\u00f6re, yakla\u015f\u0131k 400 mil (640 km) derinlikte bulunan bu tabaka, mantodaki kristal yap\u0131n\u0131n de\u011fi\u015fmesiyle bir t\u00fcr \u201ccam tavan\u201d g\u00f6revi g\u00f6r\u00fcyor. Y\u00fckselen devasa magma k\u00fctlesi tek par\u00e7a halinde y\u00fczeye ula\u015fam\u0131yor; bunun yerine \u00e7ok say\u0131da k\u00fc\u00e7\u00fck par\u00e7aya b\u00f6l\u00fcn\u00fcyor. Bu par\u00e7alar y\u00fczeye \u00e7\u0131kt\u0131\u011f\u0131nda ise farkl\u0131 boyutlarda koronalar meydana geliyor. Ara\u015ft\u0131rmac\u0131lar, bu bulgunun Ven\u00fcs\u2019\u00fcn y\u00fczeyinde g\u00f6r\u00fclen yap\u0131lar\u0131 a\u00e7\u0131klamakla kalmay\u0131p, ayn\u0131 zamanda D\u00fcnya\u2019n\u0131n jeolojik tarihine de \u0131\u015f\u0131k tuttu\u011funu s\u00f6yl\u00fcyor. \u00c7\u00fcnk\u00fc D\u00fcnya da ba\u015flang\u0131\u00e7ta tek par\u00e7a bir kabu\u011fa sahipti; zamanla k\u0131r\u0131l\u0131p levha tektoni\u011fine ge\u00e7ti. Ven\u00fcs ise bu a\u015famaya hi\u00e7 ula\u015fmad\u0131\u011f\u0131 i\u00e7in, D\u00fcnya\u2019n\u0131n erken d\u00f6nemlerine dair canl\u0131 bir \u201cjeolojik zaman kaps\u00fcl\u00fc\u201d gibi.<\/p>\n
Scripps O\u015finografi Enstit\u00fcs\u00fc\u2019nden jeofizik\u00e7i David Stegman\u2019a g\u00f6re, bu ke\u015fif Ven\u00fcs ara\u015ft\u0131rmalar\u0131nda bir d\u00f6n\u00fcm noktas\u0131 olabilir. Stegman, \u00e7al\u0131\u015fmay\u0131 \u201cVen\u00fcs hakk\u0131nda bildiklerimiz, D\u00fcnya\u2019da levha tektoni\u011fi teorisi ortaya \u00e7\u0131kmadan \u00f6nceki 1960\u2019lar\u0131n seviyesinde. Ama bu yeni a\u00e7\u0131klamayla birlikte bir devrimin e\u015fi\u011finde oldu\u011fumuzu d\u00fc\u015f\u00fcn\u00fcyoruz” ifadeleriyle a\u00e7\u0131klad\u0131.<\/p>\n