| 释义 |
北极星běijíxīng天空北部的一颗亮星,距天球北极很近,差不多正对着地轴,从地球上看,它的位置几乎不变,可以靠它来辨别方向。由于岁差,北极星并不是永远不变的某一颗星,现在是小熊座α星,到公元14000年将是织女星。{Polaris; North Star; pole star; bright star situated close to the north celestial pole, approximately opposite the earth's axis, used to take bearings because it hardly changes its position. Owing to the precession of the equinoxes, Polaris will not remain the pole star indefinitely. At present, it is the αstar in Ursa Minor; by the year 14000, Vega (in the constellation Lyra) will serve as the pole star.}参看see【北斗星】{běidǒuxīng}。 |