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(北(běi )极(jí )星(xīng ),北(běi )极(jí )星(xīng ))

即(jí )极(jí )星(xīng )。亦(yì )称(chēng )“北(běi )辰(chén )”。是(shì )出(chū )现(xiàn )于(yú )天(tiān )空(kōng )北(běi )部(bù )的(de )一(yī )颗(kē )亮(liàng )星(xīng )。距(jù )北(běi )天(tiān )极(jí )很(hěn )近(jìn ),差(chà )不(bú )多(duō )正(zhèng )对(duì )着(zhe )地(dì )轴(zhóu ),从(cóng )地(dì )球(qiú )上(shàng )看(kàn ),其(qí )位(wèi )置(zhì )几(jǐ )乎(hū )不(bú )变(biàn ),人(rén )们(men )常(cháng )靠(kào )它(tā )来(lái )辨(biàn )别(bié )方(fāng )向(xiàng )。由(yóu )于(yú )岁(suì )差(chà )的(de )缘(yuán )故(gù ),不(bú )同(tóng )历(lì )史(shǐ )时(shí )期(qī )所(suǒ )看(kàn )到(dào )的(de )北(běi )极(jí )星(xīng )是(shì )不(bú )同(tóng )的(de )。

宋(sòng )代(dài )的(de )北(běi )极(jí )星(xīng )指(zhǐ )的(de )是(shì )北(běi )极(jí )座(zuò )的(de )天(tiān )枢(shū )星(xīng ),现(xiàn )在(zài )则(zé )是(shì )小(xiǎo )熊(xióng )座(zuò )的(de )α星(xīng )(中(zhōng )名(míng )勾(gōu )陈(chén )一(yī )),到(dào )公(gōng )元(yuán )14000年(nián ),将(jiāng )是(shì )织(zhī )女(nǚ )星(xīng )。

清(qīng )王(wáng )念(niàn )孙(sūn )《读(dú )书(shū )杂(zá )志(zhì )馀(yú )篇(piān )·吕(lǚ )氏(shì )春(chūn )秋(qiū )》“极(jí )星(xīng )与(yǔ )天(tiān )俱(jù )游(yóu )而(ér )天(tiān )极(jí )不(bú )移(yí )”:“极(jí )星(xīng )即(jí )北(běi )辰(chén )也(yě )。或(huò )言(yán )北(běi )辰(chén ),或(huò )言(yán )北(běi )极(jí ),或(huò )言(yán )极(jí )星(xīng ),或(huò )言(yán )纽(niǔ )星(xīng ),或(huò )言(yán )枢(shū )星(xīng ),皆(jiē )异(yì )名(míng )而(ér )同(tóng )实(shí )。”参(cān )见(jiàn )“北(běi )斗(dòu )”。

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