Astronomy. A libration of the eighth (or ninth) sphere, added to the system of Ptolemy by the Arab astronomer Thabet ben Korrah, 950, in order to…
| 单词 | θ108 |
| 释义 | the world > the universe > celestial sphere > zone of celestial sphere > sphere of ancient astronomy > [noun] > movement (1) trepidationa1631 Astronomy. A libration of the eighth (or ninth) sphere, added to the system of Ptolemy by the Arab astronomer Thabet ben Korrah, 950, in order to… |
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