| 字词 | 天球仪 |
| 释义 | 天球仪 tiān qiú yí celestial globe; celestial sphere; star globe; cosmosphere: 中国东汉科学家张衡发明的天球仪是世界上最早的天球仪。 它可以测出太阳和月亮的角直径都是0.5度， 黄赤交角为24度。 The celestial globe invented by Zhang Heng, Chinese scientist of the East Han Dynasty （25 A.D. - 220 A.D.), was the first of its kind in the world. It determined that the angular diameter of both the sun and the moon was 0.5° and the obliquity of the ecliptic was 24°. |
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