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Comprimarea puternica a particulelor de aer din fata meteoritului, ce nu au timpul necesarsa se dea la o parte, formeaza o adevarata perna de aer. La inaltimea de 100 kilometri temperatura suprafetei corpului ajunge la 2000oC, iar perna de aer din fata sa, datorita marii presiuni, ajunge la temperaturi de mii si zeci de mii de grade.
Are loc o evaporare intensa, corpul consumindu-se rapid. Particulele de aer, amestecate cu materia meteoritica evaporata si ionizata, formeaza o sfera incandescenta, vizibila de pe Pamint. La altitudinea de 50-70 kilometri cea mai mare parte a materiei meteoritului este evaporata si pulverizata. Fenomenul luminos dureaza intre citeva fractiuni de secunda si citeva minute.
CURENTII METEORICI
Spatiul interplanetar este strabatut de miliarde de corpuri meteoritice, ale caror dimensiuni variaza de la ordinul micronilor la cel al kilometrilor. Unele dintre acestea strabat singure Cosmosul, pe orbite de obicei circumsolare, fiind corpuri meteoritice sporadice.
Altele fac parte din urasi nori de corpuri meteoritice, formind curentii meteoritici Orbitele acestora pot fi asemanatoare orbitei Pamintului, curentii strabatindu-le in 1-3 ani, excentrice (afeliul gasindu-se dincolo de Jupiter), avind o perioada de revolutie de citiva zeci de ani, sau circulare de raza mare, cu o perioada de revolutie de 5-15 ani.
Meteoritii download
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