木星合月是什么天象奇觀?
木星(xing)(xing)(xing)合(he)(he)月(yue)(yue)(yue)(yue),指木星(xing)(xing)(xing)和(he)(he)月(yue)(yue)(yue)(yue)亮(liang)(liang)正好(hao)運(yun)行(xing)(xing)到同一(yi)經(jing)度上,兩者距離達(da)到最近的(de)天(tian)象(xiang)。木星(xing)(xing)(xing)合(he)(he)月(yue)(yue)(yue)(yue)是行(xing)(xing)星(xing)(xing)(xing)合(he)(he)月(yue)(yue)(yue)(yue)天(tian)象(xiang)中的(de)一(yi)種,一(yi)年中行(xing)(xing)星(xing)(xing)(xing)合(he)(he)月(yue)(yue)(yue)(yue)的(de)現象(xiang)會(hui)(hui)發生幾十次,因(yin)為木星(xing)(xing)(xing)的(de)體積比較大(da),除“金星(xing)(xing)(xing)合(he)(he)月(yue)(yue)(yue)(yue)”之(zhi)外,“木星(xing)(xing)(xing)合(he)(he)月(yue)(yue)(yue)(yue)”是觀(guan)賞效果最好(hao)的(de)之(zhi)一(yi)。由于月(yue)(yue)(yue)(yue)球(qiu)在以27天(tian)左右(you)為周(zhou)(zhou)期繞地(di)球(qiu)公轉,因(yin)此在一(yi)個公轉周(zhou)(zhou)期內(nei),它會(hui)(hui)先后和(he)(he)幾大(da)行(xing)(xing)星(xing)(xing)(xing)靠得很近,如果一(yi)顆星(xing)(xing)(xing)和(he)(he)月(yue)(yue)(yue)(yue)球(qiu)在某(mou)時刻恰好(hao)黃經(jing)相等,就說(shuo)這顆星(xing)(xing)(xing)與月(yue)(yue)(yue)(yue)球(qiu)相合(he)(he)。當然月(yue)(yue)(yue)(yue)球(qiu)的(de)視圓(yuan)面(mian)直徑(jing)大(da)約半(ban)度,有時它甚至會(hui)(hui)遮擋住距離更遠的(de)行(xing)(xing)星(xing)(xing)(xing)或恒星(xing)(xing)(xing),形成月(yue)(yue)(yue)(yue)掩(yan)(yan)星(xing)(xing)(xing)天(tian)象(xiang)。觀(guan)測條件很好(hao)的(de)月(yue)(yue)(yue)(yue)掩(yan)(yan)亮(liang)(liang)星(xing)(xing)(xing)天(tian)象(xiang)還是比較少見的(de),但亮(liang)(liang)星(xing)(xing)(xing)合(he)(he)月(yue)(yue)(yue)(yue)卻經(jing)常上演。...
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