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學習快評丨qibao666888　　而??(er)且??(qie)這??(zhe)些??(xie)環(huán)?(huan)粒??(li)以??(yi)不??(bu)同??(tong)軌??(gui)道??(dao)繞??(rao)土??(tu)星??(xing)旋??(xuan)轉??(zhuan)??，形??(xing)成??(cheng)了??(le)從??(cong)內??(nei)到??(dao)外?(wai)的??(de)D、C、B、A、F、G、E七??(qi)個??(ge)主?(zhu)環(huán)?(huan)??，其??(qi)中??(zhong)B環(huán)??(huan)最??(zui)寬??(kuan)最??(zui)亮??(liang)??。?　　土??(tu)星??(xing)以??(yi)26.7度??(du)的??(de)傾??(qing)角??(jiao)繞??(rao)太??(tai)陽??(yang)公?(gong)轉??(zhuan)??，當??(dang)它??(ta)運??(yun)行??(xing)到??(dao)軌??(gui)道??(dao)特??(te)定??(ding)位??(wei)置??(zhi)時?(shi)??，環(huán)??(huan)平??(ping)面??(mian)恰?(qia)好??(hao)正??(zheng)對??(dui)太??(tai)陽??(yang)??。??此??(ci)時?(shi)??，陽??(yang)光??(guang)以??(yi)不??(bu)足??(zu)1度??(du)的??(de)極??(ji)淺??(qian)角??(jiao)度??(du)掠??(lve)過??(guo)環(huán)?(huan)面?(mian)??，相??(xiang)當?(dang)于??(yu)我??(wo)們??(men)側??(ce)視?(shi)一??(yi)張??(zhang)A4紙?(zhi)的??(de)邊??(bian)緣??(yuan)??，原??(yuan)本??(ben)璀??(cui)璨??(can)的??(de)光??(guang)環(huán)??(huan)便?(bian)隱??(yin)沒??(mei)在?(zai)黑??(hei)暗??(an)背??(bei)景??(jing)中??(zhong)??。。