散逸层
散逸层（英文：Exosphere），也叫外气层，是地球大气层个最外层，垃拉热层个上方，渠个顶界可被视作整个大气层个上界。散逸层大气个温度极高，因此空气粒子运动很快。又因渠离地心较远，受地球引力作用较小，所以箇一层个大气质点经常散逸到外层空间。
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