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學習快評丨qibao666888　　在??(zai)北??(bei)京??(jing)天??(tian)文?(wen)館??(guan)?，科??(ke)普??(pu)專??(zhuan)家??(jia)介??(jie)紹??(shao)?，土?(tu)星??(xing)環(huán)??(huan)的??(de)“消??(xiao)失??(shi)”并??(bing)非??(fei)真??(zhen)正?(zheng)意??(yi)義??(yi)上??(shang)的??(de)消??(xiao)失??(shi)?，而??(er)是?(shi)天??(tian)穹??(qiong)之??(zhi)上??(shang)的?(de)一??(yi)場?(chang)精??(jing)彩??(cai)的??(de)光??(guang)影??(ying)魔??(mo)術??(shu)?。??早??(zao)在??(zai)1612年??(nian)?，意??(yi)大??(da)利??(li)科??(ke)學??(xue)家??(jia)伽??(jia)利??(li)略??(lve)就??(jiu)首??(shou)次??(ci)觀??(guan)測??(ce)到??(dao)土??(tu)星??(xing)環(huán)??(huan)“消??(xiao)失??(shi)”現(xiàn)??(xian)象??(xiang)??！　⊥??(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)對祝(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)?。。