北天极是地轴和天球于北方相交的一点，即北半球星空旋转的虚拟中心点。
北极星第二星的光度中的一颗星，位于小熊星座把柄的末端，几乎位于北天极。
A star of the second magnitude at the end of the handle of the little dipper and almost at the north celestial pole.
北极星第二星的光度中的一颗星，位于小熊星座把柄的末端，几乎位于北天极。
A star of the second magnitude, at the end of the hanDle of the Little Dipper and almost at the north celestial pole.
随后，天色渐黑，星空依稀可见，地球的自转使得恒星在南天极和北天极沿着个子的轨道划下绚丽光环。
Then, as the sky darkened, the stars became visible, the Earth’s spin making them trace their own circular paths about the north and south celestial poles.
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