Atmosfir (dari bahaso Yunani Kuno (ἀτμός dibaco atmós) bararti uap, dan (σφαῖρα dibaco sphaîra) bola) adolah gas balapih nan manyalimuti sabuah planet, dan ditahan pado tampeknyo dek gravitasi planet tasabuik. Sabuah planet mampartahankan atmosfir katiko gravitasinyo bosegh dan suhu atmosfirnyo randah.[1] Sadang atmosfir bintang adolah wilayah talua bintang, lapih nan maliputi di ateh fotosfer buram; bintang-bintang basuhu randah mungkin mamiliki atmosfir lua nab manganduang molekul-molekul sanyawa.
Komposisi
Rujuakan
Pautan lua
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