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Allikas: Vikipeedia

DžomolungmaTroposfäärTropopausStratosfäärSondpallMeteoorMesosfäärStratopausKármáni joonVirmalisedMesopausTermosfäärTermopausEksosfäär
Atmosfääri ehitus

Eksobaas on eksosfääri alaosa. See paikneb kõrgusel 400–800 km.

See on atmosfääri ülaosa, kus gaaside aatomite kokkupõrked hoiavad neid Maa atmosfääris ja need ei lenda atmosfäärist välja maailmaruumi. Eksobaasist kõrgemal ei takista miski piisava kiirusega osakesel kosmosesse lennata.

Eksobaasi temperatuuriks hinnatakse umbes 1000 K, mis vastab vesiniku aatomite kiirusele umbes 5 km/s. See on väiksem teisest kosmilisest kiirusest sellel kõrgusel (10,8 km/s). Mõne aatomi kiirus võib selle siiski ületada ning need lahkuvad atmosfäärist.

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