G\u00f6kbilimciler, y\u0131ld\u0131zlar\u0131n \u201cgoldilocks\u201d b\u00f6lgesinde sekiz yeni gezegen bulduklar\u0131n\u0131 belirtti. \u201cGoldilocks\u201d b\u00f6lgesi, bir y\u0131ld\u0131z\u0131n etraf\u0131ndaki gezegenlerin, y\u0131ld\u0131za y\u00fczeylerindeki suyun s\u0131v\u0131 olarak kalabilece\u011fi uzakl\u0131kta bulunduklar\u0131 b\u00f6lgedir. Bu durum, kendi ana y\u0131ld\u0131zlar\u0131n\u0131n ya\u015fanabilir b\u00f6lgesinde olduklar\u0131na inan\u0131lan, D\u00fcnya \u00e7ap\u0131n\u0131n iki kat\u0131ndan k\u00fc\u00e7\u00fck gezegenlerin say\u0131s\u0131n\u0131 ikiye katl\u0131yor. Biliminsanlar\u0131, bu sekiz gezegen aras\u0131nda bug\u00fcne kadar bilinen \u00f6tegezegenlerin i\u00e7inde D\u00fcnya ile en \u00e7ok benzerlik g\u00f6steren iki tanesini belirledi. Harvard-Smithsonian Astrofizik Merkezi\u2019nden (CfA), makalenin ba\u015fyazar\u0131 Guillermo Torres, \u201cBu gezegenlerin bir\u00e7o\u011funun y\u00fczeyi, b\u00fcy\u00fck ihtimalle D\u00fcnyam\u0131z gibi kayal\u0131klarla kapl\u0131\u201d diyor.
\nSekiz gezegen i\u00e7erisinde D\u00fcnya\u2019yla en \u00e7ok benzerlik g\u00f6steren iki gezegen Kepler-438b ve Kepler-442b. \u0130kisi de G\u00fcne\u015fimizden daha k\u00fc\u00e7\u00fck olan ve daha az \u0131s\u0131 veren k\u0131rm\u0131z\u0131 c\u00fcce y\u0131ld\u0131zlar\u0131n y\u00f6r\u00fcngelerinde d\u00f6n\u00fcyorlar. Kepler-442b, y\u0131ld\u0131z\u0131 etraf\u0131ndaki turunu 112 g\u00fcnde tamamlarken, Kepler-438b 35 g\u00fcnde tamaml\u0131yor. Ekibin hesaplamalar\u0131na g\u00f6re, D\u00fcnya\u2019n\u0131nkinden sadece y\u00fczde 12 daha b\u00fcy\u00fck olan \u00e7ap\u0131 ile Kepler-438b\u2019nin y\u00fczde 70 kayal\u0131k olma ihtimali vard\u0131r. Kepler-442b ise, D\u00fcnya\u2019dan yakla\u015f\u0131k \u00fc\u00e7te bir oran\u0131nda daha b\u00fcy\u00fck, ancak yine de y\u00fczde 60 oran\u0131nda kayal\u0131k olma ihtimali vard\u0131r.
\nBir \u00f6tegezegenin ya\u015fanabilir b\u00f6lgede olabilmesi i\u00e7in, D\u00fcnya\u2019n\u0131n ald\u0131\u011f\u0131 kadar g\u00fcne\u015f \u0131\u015f\u0131\u011f\u0131 almas\u0131 gereklidir. \u00c7ok fazla g\u00fcne\u015f \u0131\u015f\u0131\u011f\u0131 al\u0131rsa, var olan su buharla\u015f\u0131r; \u00e7ok az g\u00fcne\u015f \u0131\u015f\u0131\u011f\u0131 al\u0131rsa da su donarak kat\u0131 hale gelir. Torres, \u201cHesaplamalar\u0131m\u0131zda ya\u015fam i\u00e7in uygun ko\u015fullar\u0131 sa\u011flayabilecek m\u00fcmk\u00fcn olan en geni\u015f s\u0131n\u0131rlar\u0131 almay\u0131 tercih ettik\u201d \u015feklinde konu\u015fuyor. Kepler-438b D\u00fcnya\u2019dan yakla\u015f\u0131k y\u00fczde 40 daha fazla \u0131\u015f\u0131k al\u0131yor. Kar\u015f\u0131la\u015ft\u0131rma yaparsak, Ven\u00fcs D\u00fcnya\u2019n\u0131n ald\u0131\u011f\u0131 miktar\u0131n iki kat\u0131 g\u00fcne\u015f radyasyonu al\u0131r. Sonu\u00e7 olarak, biliminsanlar\u0131 Kepler-438b\u2019nin kendi y\u0131ld\u0131z\u0131n\u0131n y\u00f6r\u00fcngesinde ya\u015fanabilir b\u00f6lgede olma olas\u0131l\u0131\u011f\u0131n\u0131n y\u00fczde 70 oldu\u011funu hesapl\u0131yor.
\nKepler-442b D\u00fcnya\u2019n\u0131n ald\u0131\u011f\u0131 \u0131\u015f\u0131\u011f\u0131n yakla\u015f\u0131k 2\/3\u2019\u00fc kadar \u0131\u015f\u0131k al\u0131r. Biliminsanlar\u0131 Kepler-442b\u2019nin ya\u015fanabilir b\u00f6lgede olmas\u0131na ise y\u00fczde 97 ihtimal veriyor.
\nHarvard-Smithsonian Astrofizik Merkezi\u2019nden (CfA), makalenin ikinci yazar\u0131 David Kipping, \u201c\u00d6rne\u011fimizdeki gezegenlerin hakikaten ya\u015fanabilir olup olmad\u0131\u011f\u0131n\u0131 kesin olarak bilmiyoruz. T\u00fcm s\u00f6yleyebildi\u011fimiz aday olarak umut verdikleri\u201d diyor.
\nBundan \u00f6nce, D\u00fcnya\u2019yla en \u00e7ok benzerlik g\u00f6sterdi\u011fi bilinen iki gezegen D\u00fcnya\u2019n\u0131n b\u00fcy\u00fckl\u00fc\u011f\u00fcn\u00fcn 1,1 kat\u0131 olan ve D\u00fcnya\u2019n\u0131n ald\u0131\u011f\u0131 \u0131\u015f\u0131\u011f\u0131n y\u00fczde 32\u2019si kadar \u0131\u015f\u0131k alan Kepler-186f ve D\u00fcnya\u2019n\u0131n b\u00fcy\u00fckl\u00fc\u011f\u00fcn\u00fcn 1,4 kat\u0131 olan ve D\u00fcnya\u2019n\u0131n ald\u0131\u011f\u0131 \u0131\u015f\u0131\u011f\u0131n y\u00fczde 41\u2019i kadar \u0131\u015f\u0131k alan Kepler-62f\u2019di.
\nBiliminsanlar\u0131, NASA\u2019n\u0131n Kepler teleskopu taraf\u0131ndan ilk kez belirlenen gezegen adaylar\u0131 \u00fczerine \u00e7al\u0131\u015fma yapt\u0131. Gezegenlerin hepsi, k\u00fctlelerini \u00f6l\u00e7meyle gezegen olarak onaylanmayacak kadar k\u00fc\u00e7\u00fcklerdi. Ara\u015ft\u0131rmac\u0131lar, istatistiksel olarak gezegen olma ihtimallerini saptamak i\u00e7in BLENDER adl\u0131 bilgisayar program\u0131n\u0131 kullanarak bulgular\u0131 do\u011frulad\u0131. BLENDER, Torres ve meslekta\u015f\u0131 Francois Fressin taraf\u0131ndan geli\u015ftirildi; program NASA Ames Ara\u015ft\u0131rma Merkezi\u2019nde Pleiades S\u00fcper G\u00fc\u00e7l\u00fc Bilgisayarda \u00e7al\u0131\u015ft\u0131r\u0131l\u0131yor. BLENDER analizinden sonra, ekip di\u011fer y\u0131l\u0131 y\u00fcksek \u00e7\u00f6z\u00fcn\u00fcrl\u00fckl\u00fc spektroskopi modeli, uyarlamal\u0131 optik g\u00f6r\u00fcnt\u00fcleme ve sistemleri ayr\u0131nt\u0131lar\u0131yla tan\u0131mlamak i\u00e7in interferometreyle g\u00f6zlem sonucu toplamayla ge\u00e7irdi. Ula\u015f\u0131lan sonu\u00e7lar, yeni do\u011frulanm\u0131\u015f d\u00f6rt gezegenin \u00e7oklu y\u0131ld\u0131z sistemlerinde oldu\u011funu ortaya \u00e7\u0131kard\u0131. Ancak, \u00e7oklu sisteme ait olan y\u0131ld\u0131zlar uzakta bulunuyor ve gezegenleri \u00f6nemli \u00f6l\u00e7\u00fcde etkilemiyorlar.
\nYeni bulunan gezegenler, daha fazla g\u00f6zlem yapmay\u0131 zorla\u015ft\u0131racak kadar uzaktalar. Kepler-438b D\u00fcnya\u2019dan 470 \u0131\u015f\u0131k y\u0131l\u0131 uzakta bulunuyorken, Kepler-442b D\u00fcnya\u2019dan 1100 \u0131\u015f\u0131k y\u0131l\u0131 uzakta bulunuyor.<\/p>\n
\u00c7eviren: Ya\u011fmur \u0130\u015feri Kaynak: <\/strong>http:\/\/phys.org\/news\/2015-01-planets-goldilocks-zone.html<\/p>\n","protected":false},"excerpt":{"rendered":" G\u00f6kbilimciler, y\u0131ld\u0131zlar\u0131n \u201cgoldilocks\u201d b\u00f6lgesinde sekiz yeni gezegen bulduklar\u0131n\u0131 belirtti. \u201cGoldilocks\u201d b\u00f6lgesi, bir y\u0131ld\u0131z\u0131n etraf\u0131ndaki gezegenlerin, y\u0131ld\u0131za y\u00fczeylerindeki suyun s\u0131v\u0131 olarak kalabilece\u011fi uzakl\u0131kta bulunduklar\u0131 b\u00f6lgedir. Bu durum, kendi ana y\u0131ld\u0131zlar\u0131n\u0131n ya\u015fanabilir b\u00f6lgesinde olduklar\u0131na inan\u0131lan, D\u00fcnya \u00e7ap\u0131n\u0131n iki kat\u0131ndan k\u00fc\u00e7\u00fck gezegenlerin say\u0131s\u0131n\u0131 ikiye katl\u0131yor. Biliminsanlar\u0131, bu sekiz gezegen aras\u0131nda bug\u00fcne kadar bilinen \u00f6tegezegenlerin i\u00e7inde D\u00fcnya ile en […]<\/p>\n","protected":false},"author":1,"featured_media":1681,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[30,19],"tags":[],"class_list":["post-1680","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-astronomi","category-bilim-gundemi"],"acf":[],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/bilimvegelecek.com.tr\/index.php\/wp-json\/wp\/v2\/posts\/1680","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/bilimvegelecek.com.tr\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/bilimvegelecek.com.tr\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/bilimvegelecek.com.tr\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/bilimvegelecek.com.tr\/index.php\/wp-json\/wp\/v2\/comments?post=1680"}],"version-history":[{"count":0,"href":"https:\/\/bilimvegelecek.com.tr\/index.php\/wp-json\/wp\/v2\/posts\/1680\/revisions"}],"wp:attachment":[{"href":"https:\/\/bilimvegelecek.com.tr\/index.php\/wp-json\/wp\/v2\/media?parent=1680"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/bilimvegelecek.com.tr\/index.php\/wp-json\/wp\/v2\/categories?post=1680"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/bilimvegelecek.com.tr\/index.php\/wp-json\/wp\/v2\/tags?post=1680"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}
\n\u0130T\u00dc End\u00fcstri M\u00fchendisli\u011fi<\/strong><\/em><\/p>\n