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學(xué)習(xí)快評(píng)丨qibao666888　　北??(bei)京??(jing)天??(tian)文??(wen)館??(guan)科??(ke)普??(pu)教??(jiao)育??(yu)部??(bu)副??(fu)研??(yan)究??(jiu)館??(guan)員??(yuan)曹??(cao)軍??(jun)表??(biao)示??(shi)??，如??(ru)果??(guo)持??(chi)續(xù)??(xu)觀??(guan)察??(cha)土??(tu)星?(xing)??，會(huì)??(hui)發(fā)??(fa)現(xiàn)??(xian)光??(guang)環(huán)??(huan)朝??(chao)向??(xiang)地??(di)球??(qiu)的??(de)角??(jiao)度??(du)是??(shi)在??(zai)不??(bu)斷??(duan)變??(bian)化??(hua)的??(de)??，大??(da)概??(gai)十??(shi)幾??(ji)年??(nian)會(huì)??(hui)完?(wan)成??(cheng)一??(yi)個(gè)?(ge)輪??(lun)回??(hui)??。??今??(jin)年??(nian)3月??(yue)份??(fen)??，地??(di)球??(qiu)正?(zheng)好??(hao)在??(zai)光??(guang)環(huán)?(huan)的?(de)平??(ping)面??(mian)上??(shang)??，因??(yin)此??(ci)看??(kan)上??(shang)去?(qu)就??(jiu)好??(hao)像??(xiang)光??(guang)環(huán)??(huan)消??(xiao)失??(shi)了??(le)一??(yi)樣??(yang)??。　　土??(tu)星??(xing)以??(yi)26.7度??(du)的??(de)傾??(qing)角?(jiao)繞??(rao)太??(tai)陽(yáng)??(yang)公??(gong)轉(zhuǎn)??(zhuan)??，當(dāng)??(dang)它??(ta)運(yùn)??(yun)行??(xing)到??(dao)軌??(gui)道??(dao)特??(te)定??(ding)位??(wei)置??(zhi)時(shí)??(shi)??，環(huán)??(huan)平??(ping)面??(mian)恰??(qia)好??(hao)正??(zheng)對(duì)??(dui)太??(tai)陽(yáng)??(yang)??。??此??(ci)時(shí)??(shi)??，陽(yáng)??(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(guò)??(guo)環(huán)??(huan)面??(mian)??，相??(xiang)當(dāng)??(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)??，原祝(yuan)本??(ben)璀??(cui)璨??(can)的??(de)光??(guang)環(huán)??(huan)便??(bian)隱??(yin)沒(méi)??(mei)在??(zai)黑??(hei)暗??(an)背??(bei)景??(jing)中??(zhong)??。。