{"id":33404,"date":"2019-03-27T03:13:54","date_gmt":"2019-03-27T00:13:54","guid":{"rendered":"https:\/\/bilimvegelecek.com.tr\/?p=33404"},"modified":"2019-03-27T01:19:34","modified_gmt":"2019-03-26T22:19:34","slug":"jupiterin-gunese-yolculugu","status":"publish","type":"post","link":"https:\/\/bilimvegelecek.com.tr\/index.php\/2019\/03\/27\/jupiterin-gunese-yolculugu","title":{"rendered":"J\u00fcpiter\u2019in G\u00fcne\u015f\u2019e yolculu\u011fu"},"content":{"rendered":"

4.5 milyar y\u0131l \u00f6nce ba\u015flad\u0131\u2026 O zamanlar J\u00fcpiter, G\u00fcne\u015f Sistemi\u2019ndeki di\u011fer pek \u00e7ok gezegen gibi hen\u00fcz emekleme \u00e7a\u011f\u0131ndayd\u0131. Bug\u00fcn, hidrojen ve helyumdan olu\u015fan m\u00fcthi\u015f kal\u0131n atmosferi sayesinde D\u00fcnya\u2019n\u0131n 1300 kat\u0131 b\u00fcy\u00fckl\u00fc\u011fe ula\u015fm\u0131\u015f olan bu gaz devi, gen\u00e7 G\u00fcne\u015f\u2019imizi \u00e7evreleyen gaz ve partik\u00fcl bulutunun olu\u015fturdu\u011fu kozmik toz i\u00e7inde yeni yeni ve kademeli olarak olu\u015fan di\u011fer t\u00fcm gezegenler gibi, \u015fimdikinden epeyce farkl\u0131yd\u0131. Bug\u00fcn G\u00fcne\u015f Sistemi\u2019nin en b\u00fcy\u00fck gezegeni olan J\u00fcpiter, o zamanlar boyutlar\u0131 D\u00fcnya\u2019n\u0131nkini a\u015fmayan bir \u00e7ekirdekten ibaretti. Ama sadece b\u00fcy\u00fckl\u00fc\u011f\u00fc de\u011fil, G\u00fcne\u015f\u2019e olan mesafesi de farkl\u0131yd\u0131: \u015eimdiki konumunun nereden baksan\u0131z d\u00f6rt kat\u0131 uzakl\u0131kta bir yerlerde\u2026<\/span><\/p>\n

\u0130sve\u00e7\u2019teki Lund \u00dcniversitesi ara\u015ft\u0131rmac\u0131lar\u0131n\u0131n ilk defa kan\u0131tlarla ortaya koydu\u011fu bu \u2018minik\u2019 detay <\/span>Astronomy&Astrophysics<\/span><\/i> dergisinin 21 \u015eubat say\u0131s\u0131nda yay\u0131mland\u0131. J\u00fcpiter\u2019in g\u00f6\u00e7\u00fcn\u00fc ele verense, y\u00f6r\u00fcngesinde dolanan Truva asteroidleri oldu (\u0130ngilizcede Trojan; bu g\u00f6kcisimleri Truva Sava\u015f\u0131\u2019ndaki askerlerden esinle isimlendirilmi\u015f). J\u00fcpiter\u2019in \u00f6n ve arka k\u0131sm\u0131nda iki grup halinde sal\u0131nan, G\u00fcne\u015f\u2019e J\u00fcpiter\u2019le ayn\u0131 uzakl\u0131kta bulunan binlerce asteroidlik bir ku\u015faktan s\u00f6z ediyoruz. Peki ara\u015ft\u0131rmac\u0131lar\u0131 Truva\u2019lardan yola \u00e7\u0131karak J\u00fcpiter\u2019in g\u00f6\u00e7\u00fcne g\u00f6t\u00fcren ne olmu\u015f olabilir? Cevap, nicedir G\u00fcne\u015f Sistemi\u2019ndeki gizemlerden biri olarak kabul edilen Truva asimetrisinde. J\u00fcpiter\u2019in \u00f6n y\u00fcz\u00fcnde, arka k\u0131sm\u0131ndakinden %50 kadar daha fazla Truva asteroidi bulunuyor. \u015eimdiye kadar nedeni a\u00e7\u0131klanamayan bu say\u0131sal fark\u0131n s\u0131rr\u0131, J\u00fcpiter\u2019in olu\u015fumunu sergileyen olaylar silsilesinin bilgisayar sim\u00fclasyonlar\u0131 yoluyla yeniden tasarlanmas\u0131yla ortaya \u00e7\u0131km\u0131\u015f. Temelde gezegenin Truva asteroidlerini kendine \u00e7ekme \u00f6yk\u00fcs\u00fcn\u00fc a\u00e7\u0131\u011fa \u00e7\u0131karmay\u0131 hedefleyen bu sim\u00fclasyonlar, mevcut asimetrinin ancak tek bir \u015fartla olu\u015fmu\u015f olabilece\u011fini g\u00f6stermi\u015f: Ancak ve ancak J\u00fcpiter G\u00fcne\u015f Sistemi i\u00e7indeki mevcut konumundan d\u00f6rt kat uzakta olu\u015fmu\u015f ve akabinde bulundu\u011fu yere g\u00f6\u00e7 etmi\u015fse! Zira gezegenin k\u00fctle\u00e7ekiminin Truva asteroidlerini etraf\u0131na toplama \u015fablonu G\u00fcne\u015f\u2019e do\u011fru yap\u0131lan b\u00f6ylesi bir yolculu\u011fu \u015fart ko\u015fuyor. En az\u0131ndan matematiksel olarak\u2026<\/span><\/p>\n

Hesaplamalara g\u00f6re J\u00fcpiter\u2019in mevcut konumuna g\u00f6\u00e7\u00fc G\u00fcne\u015f\u2019ten uzaklarda, buzdan bir asteroid olarak hayat\u0131na ba\u015flad\u0131ktan yakla\u015f\u0131k 2-3 milyon y\u0131l sonra ba\u015flam\u0131\u015f ve 700.000 y\u0131l kadar s\u00fcrm\u00fc\u015f. G\u00fcne\u015f Sistemi\u2019ne hakim olan gazlar\u0131n \u00e7ekim kuvvetinin etkisiyle G\u00fcne\u015f Sistemi\u2019nin i\u00e7 k\u0131s\u0131mlar\u0131na do\u011fru helezonik bir yol izleyerek ilerleyen J\u00fcpiter, hen\u00fcz gaz yap\u0131l\u0131 atmosferinden yoksun, gen\u00e7 bir gezegenken Truva asteroidlerini etraf\u0131nda toplamaya ba\u015flam\u0131\u015f. Normal \u015fartlarda Truva asteroidleri, gezegen y\u00f6r\u00fcngesinin altm\u0131\u015f derece \u00f6n ve arka y\u00fcz\u00fcnde bulunan, b\u00fcy\u00fck g\u00f6k cisimlerinin yaratt\u0131\u011f\u0131 k\u00fctle\u00e7ekim kuvvetinin merkezka\u00e7 kuvvetiyle s\u0131f\u0131rland\u0131\u011f\u0131 bir stabilite alan\u0131 olan Lagrange noktalar\u0131 \u00fczerinde bulunuyor. Tamamen sabit bir g\u00f6kcismi s\u00f6z konusu oldu\u011funda asteroidlerin bu noktalar aras\u0131nda e\u015fit da\u011f\u0131l\u0131m g\u00f6stermesi beklenir. Ancak belirtildi\u011fi gibi J\u00fcpiter\u2019in sava\u015f\u00e7\u0131 asteroidleri \u00f6zelinde tablo farkl\u0131. Lund \u00dcniversitesi ara\u015ft\u0131rmac\u0131lar\u0131na g\u00f6re bunun en akla yatk\u0131n a\u00e7\u0131klamas\u0131 gezegenin stabil de\u011fil, tam tersi hareket halindeyken yaratt\u0131\u011f\u0131 s\u00fcr\u00fcklenme kuvvetinin \u00f6nc\u00fc, yani \u00f6n k\u0131s\u0131mdaki Lagrange noktalar\u0131nda daha fazla, kuyruk, yani arka k\u0131s\u0131mdaki Lagrange noktalar\u0131nda ise daha az say\u0131da asteroid toplam\u0131\u015f olmas\u0131. Bu da J\u00fcpiter\u2019in bir zamanlar \u015fimdi Uran\u00fcs ve Nept\u00fcn\u2019\u00fcn bulundu\u011fu yerden bug\u00fcnk\u00fc konumuna yol alm\u0131\u015f oldu\u011funu g\u00f6steriyor. Ara\u015ft\u0131rmac\u0131lar\u0131n belirtti\u011fine g\u00f6re J\u00fcpiter, pe\u015fine Sat\u00fcrn, Uran\u00fcs ve Nept\u00fcn\u2019\u00fc takt\u0131\u011f\u0131 yolculu\u011fu s\u0131ras\u0131nda \u00f6n\u00fcne \u00e7\u0131kan g\u00f6kcisimlerini silip s\u00fcp\u00fcrm\u00fc\u015f ve bize ula\u015fmadan durmu\u015f g\u00f6r\u00fcn\u00fcyor. Biz D\u00fcnyal\u0131lar yine \u015fansl\u0131y\u0131z!<\/span><\/p>\n

Kaynak
\n<\/b>\u201cJupiter\u2019s unknown journey revealed\u201d, Lund University News and Press Releases, 22 Mart 2019.<\/span><\/p>\n","protected":false},"excerpt":{"rendered":"

4.5 milyar y\u0131l \u00f6nce ba\u015flad\u0131\u2026 O zamanlar J\u00fcpiter, G\u00fcne\u015f Sistemi\u2019ndeki di\u011fer pek \u00e7ok gezegen gibi hen\u00fcz emekleme \u00e7a\u011f\u0131ndayd\u0131. Bug\u00fcn, hidrojen ve helyumdan olu\u015fan m\u00fcthi\u015f kal\u0131n atmosferi sayesinde D\u00fcnya\u2019n\u0131n 1300 kat\u0131 b\u00fcy\u00fckl\u00fc\u011fe ula\u015fm\u0131\u015f olan bu gaz devi, gen\u00e7 G\u00fcne\u015f\u2019imizi \u00e7evreleyen gaz ve partik\u00fcl bulutunun olu\u015fturdu\u011fu kozmik toz i\u00e7inde yeni yeni ve kademeli olarak olu\u015fan di\u011fer t\u00fcm […]<\/p>\n","protected":false},"author":184,"featured_media":33403,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[30,19,26],"tags":[297,728,4704],"class_list":["post-33404","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-astronomi","category-bilim-gundemi","category-fizik","tag-gunes-sistemi","tag-jupiter","tag-truva-asteroidleri"],"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