NASA\u2019n\u0131n yeni ekoplanet avc\u0131s\u0131 uzay teleskopu TESS ile, t\u00fcm g\u00f6ky\u00fcz\u00fc aramas\u0131, g\u00fcne\u015f sistemimize yak\u0131n muhtemel ya\u015fanabilir gezegenler i\u00e7in yap\u0131l\u0131yor. TESS \u2013 13.7 g\u00fcnde bir D\u00fcnya\u2019n\u0131n y\u00f6r\u00fcngesinde \u2013 ve yer tabanl\u0131 teleskoplar, \u00f6n\u00fcm\u00fczdeki birka\u00e7 y\u0131l i\u00e7inde y\u00fczlerce gezegeni bulmak i\u00e7in haz\u0131rlan\u0131yor. Bu, astronomlar\u0131n \u00e7evremizdeki yabanc\u0131 d\u00fcnyalar\u0131 anlamalar\u0131n\u0131 de\u011fi\u015ftirebilir ve ya\u015fam\u0131n imzalar\u0131 i\u00e7in gelecek nesil teleskoplarla tarama hedefleri sa\u011flayabilir.<\/p>\n
Bir y\u0131ldan biraz fazla bir s\u00fcre i\u00e7erisinde TESS 1.200\u2019den fazla gezegen aday\u0131 belirledi ve bunlar\u0131n 29\u2019u g\u00f6kbilimcilerin taraf\u0131nca gezegen olarak do\u011fruland\u0131. TESS\u2019in gezegenler i\u00e7in ayn\u0131 anda on binlerce y\u0131ld\u0131z\u0131 ayn\u0131 anda arama yetene\u011fi g\u00f6z \u00f6n\u00fcne al\u0131nd\u0131\u011f\u0131nda, misyonun 10.000\u2019den fazla yeni d\u00fcnya \u00fcretmesi bekleniyor.<\/p>\n
Etraf\u0131m\u0131zdaki d\u00fcnyalar ke\u015ffedilmeyi bekliyor. \u00d6rne\u011fin, Proxima Centauri\u2019yi ele alal\u0131m, m\u00fctevaz\u0131, s\u00f6n\u00fck bir k\u0131rm\u0131z\u0131 y\u0131ld\u0131z, teleskopsuz g\u00f6r\u00fcnmez. Galaksimizdeki y\u00fcz milyardan fazla y\u0131ld\u0131zdan biri. Orbiting Proxima, proxmia b ad\u0131 verilen ve sadece 2016 y\u0131l\u0131nda ke\u015ffedilen b\u00fcy\u00fcleyici ama gizemli bir d\u00fcnyad\u0131r.<\/p>\n
Bilim adamlar\u0131 Proxima B hakk\u0131nda \u015fa\u015f\u0131rt\u0131c\u0131 derecede az \u015fey biliyorlar. G\u00f6kbilimciler, \u201cB\u201d sisteminde ke\u015ffedilen ilk gezegene isim verdiler. Bu gezegen hi\u00e7 bir \u015fekilde insan g\u00f6z\u00fcyle veya teleskopla g\u00f6r\u00fclmedi. Ancak, y\u0131ld\u0131z\u0131n hi\u00e7 bu kadar yalpalamas\u0131n\u0131 sa\u011flayan y\u0131ld\u0131zdaki yer\u00e7ekimsel \u00e7ekimi nedeniyle var oldu\u011funu biliyoruz. Bu hafif yalpalama, \u00e7ok say\u0131da yere dayal\u0131 teleskopla al\u0131nan verilerden b\u00fcy\u00fck, uluslararas\u0131 bir g\u00f6kbilimci grubu taraf\u0131ndan toplanan \u00f6l\u00e7\u00fcmlerde bulundu. Proxima B muhtemelen bizim d\u00fcnyam\u0131za benziyor, ancak daha y\u00fcksek k\u00fctleli kayal\u0131k bir yap\u0131ya sahip. D\u00fcnya\u2019n\u0131n G\u00fcne\u015ften ald\u0131\u011f\u0131 \u0131s\u0131 miktar\u0131 ile ayn\u0131 miktarda \u0131s\u0131 al\u0131yor.<\/p>\n
Ve bu gezegeni bu kadar heyecan verici yapan \u015fey budur: \u201cya\u015fan\u0131labilir\u201d b\u00f6lgede yer al\u0131yor ve sadece bir y\u00fczey, s\u0131v\u0131 su gibi ve D\u00fcnya\u2019n\u0131nkine benzer \u00f6zelliklere sahip olabilir \u2013 kim bilir? \u2013 belki de masal kimyasal ya\u015fam belirtileri ta\u015f\u0131yan bir atmosferdir.<\/p>\n
NASA\u2019n\u0131n TESS misyonu Nisan 2018\u2019de d\u00fcnya b\u00fcy\u00fckl\u00fc\u011f\u00fcndeki di\u011fer gezegenleri avlamak i\u00e7in f\u0131rlat\u0131ld\u0131, ancak farkl\u0131 bir y\u00f6ntemle. TESS, gezegenlerin ev sahibi y\u0131ld\u0131zlar\u0131n \u00f6n\u00fcnden ge\u00e7erek y\u0131ld\u0131z \u0131\u015f\u0131\u011f\u0131n\u0131 engelleyen nadir karartma olaylar\u0131n\u0131 ar\u0131yor. Bu ge\u00e7i\u015f olaylar\u0131 sadece gezegenlerin varl\u0131\u011f\u0131n\u0131 de\u011fil, ayn\u0131 zamanda boyutlar\u0131n\u0131 ve y\u00f6r\u00fcngelerini de g\u00f6steriyor.<\/p>\n
Yeni bir ge\u00e7i\u015f \u00f6tegezegeni bulmak bizim gibi g\u00f6kbilimciler i\u00e7in b\u00fcy\u00fck bir olayd\u0131r \u00e7\u00fcnk\u00fc y\u0131ld\u0131z sallanmalar\u0131nda bulunanlar\u0131n aksine, ge\u00e7i\u015f teshisini g\u00f6r\u00fclen d\u00fcnyalar yo\u011funluklar\u0131n\u0131 ve atmosferik bile\u015fimlerini belirlemek i\u00e7in daha fazla incelenebilir.<\/p>\n
Bizim i\u00e7in en heyecan verici \u00f6tegezegenler, TESS\u2019in k\u0131rm\u0131z\u0131 c\u00fcceler olarak adland\u0131r\u0131lan k\u00fc\u00e7\u00fck y\u0131ld\u0131zlar\u0131n y\u00f6r\u00fcngesinde d\u00f6nd\u00fcklerinde tespit edebilece\u011fi en k\u00fc\u00e7\u00fck gezegenlerdir \u2013 G\u00fcne\u015f\u2019imizin k\u00fctlesinin yar\u0131s\u0131ndan daha az k\u00fctleye sahip y\u0131ld\u0131zlar.<\/p>\n
Bu sistemlerin her biri benzersizdir. \u00d6rne\u011fin, LP 791-18, Tess\u2019in iki d\u00fcnya buldu\u011fu D\u00fcnya\u2019dan 86 \u0131\u015f\u0131k y\u0131l\u0131 uzakl\u0131kta ki k\u0131rm\u0131z\u0131 c\u00fcce y\u0131ld\u0131zd\u0131r. \u0130lki \u201cs\u00fcper D\u00fcnya\u201d, D\u00fcnya\u2019dan daha b\u00fcy\u00fck ama muhtemelen \u00e7o\u011funlukla kayal\u0131k bir gezegen, ikincisi ise Nept\u00fcn\u2019den daha k\u00fc\u00e7\u00fck ama gaz ve buz a\u00e7\u0131s\u0131ndan zengin bir gezegen olan \u201cmini-Nept\u00fcn\u201dd\u00fcr. Bu gezegenlerin hi\u00e7birinin g\u00fcne\u015f sistemimizde benzerleri yok.<\/p>\n
Kaynak: pchocasi.com.tr – Cenk Kahramaner<\/p>\n","protected":false},"excerpt":{"rendered":"
NASA\u2019n\u0131n yeni ekoplanet avc\u0131s\u0131 uzay teleskopu TESS ile, t\u00fcm g\u00f6ky\u00fcz\u00fc aramas\u0131, g\u00fcne\u015f sistemimize yak\u0131n muhtemel ya\u015fanabilir gezegenler i\u00e7in yap\u0131l\u0131yor. TESS \u2013 13.7 g\u00fcnde bir D\u00fcnya\u2019n\u0131n y\u00f6r\u00fcngesinde \u2013 ve yer tabanl\u0131 teleskoplar, \u00f6n\u00fcm\u00fczdeki birka\u00e7 y\u0131l i\u00e7inde y\u00fczlerce gezegeni bulmak i\u00e7in haz\u0131rlan\u0131yor. Bu, astronomlar\u0131n \u00e7evremizdeki yabanc\u0131 d\u00fcnyalar\u0131 anlamalar\u0131n\u0131 de\u011fi\u015ftirebilir ve ya\u015fam\u0131n imzalar\u0131 i\u00e7in gelecek nesil teleskoplarla tarama […]<\/p>\n","protected":false},"author":23,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"inline_featured_image":false,"footnotes":""},"categories":[506],"tags":[],"class_list":["post-114272","post","type-post","status-publish","format-standard","hentry","category-astronomi"],"acf":[],"yoast_head":"\n