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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(shù)??(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)??。　　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(zhuǎn)??(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(cè)??(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)??。。