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學(xué)習(xí)快評丨qibao666888　　土??(tu)星??(xing)環(huán)??(huan)這??(zhe)個(gè)??(ge)“大??(da)圓??(yuan)環(huán)??(huan)”的??(de)直??(zhi)徑?(jing)大??(da)約??(yue)是??(shi)28萬??(wan)公?(gong)里??(li)??，相??(xiang)當(dāng)??(dang)于??(yu)地??(di)月??(yue)距??(ju)離??(li)的??(de)三??(san)分??(fen)之??(zhi)二??(er)??，但??(dan)是??(shi)土??(tu)星??(xing)環(huán)??(huan)的??(de)平??(ping)均?(jun)垂??(chui)直??(zhi)厚??(hou)度??(du)卻??(que)只??(zhi)有??(you)10米?(mi)左??(zuo)右??(you)??。??所??(suo)以??(yi)說??(shuo)??，土??(tu)星??(xing)的??(de)光?(guang)環(huán)??(huan)“薄??(bo)如?(ru)蟬??(chan)翼??(yi)”??，那??(na)它??(ta)是??(shi)由??(you)什?(shen)么??(me)組??(zu)成??(cheng)的??(de)呢祝(ne)？??。