Imfihlakalo yamaTrojans namaGreki
Imfihlakalo yokuphila mhlawumbe inkulu kakhulu, kodwa akuyona ukuphela kwemfihlakalo Yohlelo lwethu lapho ososayensi bebhuqa khona ubuchopho babo. Kukhona abanye, isibonelo, iTrojans namaGreki, i.e. amaqembu amabili ama-asteroid azungeza iLanga emizileni efana kakhulu nomgudu weJupiter (4). Agxiliswe eduze kwamaphoyinti okukhululwa (iziqongo zonxantathu ababili abalinganayo futhi isisekelo siyingxenye ye-Sun-Jupiter).
4. AmaTrojani namaGreki azungeza iJupiter
Kungani kuneziningi zalezi zinto futhi kungani zihleleke ngendlela exakile? Ngaphezu kwalokho, "emzileni" weJupiter kukhona ama-asteroids "ekamu lamaGreki", elidlula i-Jupiter ekuhambeni kwayo kwe-orbital, lihambahamba endaweni yokukhululwa L4, elise-orbit 60 ° ngaphambi kweplanethi, futhi ukuya "ekamu leTrojan" landela ngemuva kweplanethi, eduze ne-L5, ku-orbit 60° ngemuva kwe-Jupiter.
Ongakusho ngakho Ibhande le-Kuiper (5), ukusebenza kwayo, ngokwemibono yakudala, nakho akulula ukukuhumusha. Ngaphezu kwalokho, izinto eziningi ezikulo zizungeza ngezindlela eziyinqaba, ezithambekele ngendlela engavamile. Muva nje kube nombono okhulayo wokuthi okungaqondakali okubonwe kulesi sifunda kubangelwa into enkulu, okuthiwa iplanethi yesishiyagalolunye, kodwa, engakaze ibonwe ngokuqondile. Ososayensi bazama ukubhekana nezinkinga ngendlela yabo - bakha amamodeli amasha (6).
5 I-Kuiper Belt Around the Solar System
Ngokwesibonelo, ngokusho okuthiwa Imodeli enhle, eyethulwa okokuqala ngo-2005, isimiso sethu sonozungezilanga sasincane kakhulu ekuqaleni, kodwa eminyakeni eyizigidi ezingamakhulu ambalwa ngemva kokwakhiwa kwaso. ukufuduka kweplanethi eminye imizila. Imodeli ye-Nice inikeza impendulo engaba khona ekubunjweni kwe-Uranus ne-Neptune, okuyimizila ekude kakhulu ukuthi ingakheka ngisho nasesimisweni sonozungezilanga sakuqala ngenxa yokuthi ukuminyana kwezinto zendawo kwakuphansi kakhulu lapho.
NgokukaFrancesca DeMeo, usosayensi e-US Harvard-Smithsonian Center for Astrophysics (CfA), i-Jupiter yayisondelene neLanga esikhathini esidlule njengoba i-Mars manje. Khona-ke, ibuyela emuva emzileni wayo wamanje, i-Jupiter yabhubhisa cishe lonke ibhande le-asteroid - kuphela u-0,1% wabantu base-asteroid abasele. Ngakolunye uhlangothi, lokhu kufuduka kuphinde kwathumela izinto ezincane ukusuka ebhande le-asteroid ukuya emaphethelweni esimiso sonozungezilanga.
6. Amamodeli ahlukahlukene okwakhiwa kwezinhlelo zeplanethi kusuka kuma-protodisk wento.
Mhlawumbe ukufuduka kweziqhwaga zegesi esimisweni sethu sonozungezilanga nakho kwabangela ukuba ama-asteroid kanye nenkanyezi enomsila angqubuzane noMhlaba, ngaleyo ndlela anikeze iplanethi yethu amanzi. Lokhu kungasho ukuthi izimo zokwakheka kwamaplanethi anezici ezinjengobuso boMhlaba azivamile, futhi impilo ingaba khona kaningi ezinyangeni ezineqhwa noma imihlaba emikhulukazi yolwandle. Le modeli ingachaza indawo eyinqaba yamaTrojan namaGreki, kanye nokuqhunyiswa kwamabhomu okukhulu kwe-asteroid isifunda sethu se-cosmic sabhekana nakho cishe eminyakeni eyizigidi eziyizinkulungwane ezingu-3,9 edlule futhi imikhondo yayo ibonakala ngokucacile ebusweni beNyanga. Kwenzeka eMhlabeni ngaleso sikhathi Isikhathi saseHadean (kusuka eHayidesi, noma iSihogo sasendulo sesiGreki).
