| 1. | Celestial poles are situated directly over the earth's geographical poles .
天极直接位于地球的地理极上面。 |
| 2. | Is special because it is very near the north celestial pole . thus , it appears to be stationary
虽然只是众多拱极星中的一颗，但由于它非常接近天球北极，所以看来似乎永远静止不动。 |
| 3. | 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 |
| 4. | Poor southerners , there is no bright star near the south celestial pole . here are three simulations of what can be seen in the northern hemisphere
可惜的是，天球南极附近没有光星，所以没有南极星为南半球居民引路。 |
| 5. | Similar to the latitude , runs from 90 or 90n , at the north celestial pole , to - 90 or 90s at the south celestial pole . the right ascension
的算法是从天球赤道开始至两极止，向北由0度至90度或北90度，向南由0度至- 90度或南90度。 |
| 6. | People in the northern hemisphere can never see stars near the south celestial pole , and people on the southern hemisphere can never see polaris
居住在北半球的人永远看不到接近南天极的星，而居住在南半球的人同样也看不到接近北天极的星。 |
| 7. | The polar axis should point to the celestial pole around which all stars seem to rotate and the elevation of the axis should be the same as the latitude of the location
赤道仪的极轴必须对准星空的转动中心，而仰角则相等于拍摄地点的纬度。 |
| 8. | A celestial object will reach its highest position when passing through the semi - circle which includes the zenith and the nearest celestial pole , and this phenomenon is called upper culmination
包括天极天顶和天底的大圆圈称为子午圈。当天体经过观测者的子午圈时便称为中天。 |
| 9. | On the contrary , an object reaches its lowest position when passing through the semi - circle which includes the nadir and the nearest celestial pole , and this phenomenon is called lower culmination
经过包括天顶的那半个子午圈时，天体到达最高位置，称为上中天。经过包括天底的那半个子午圈时，天体到达最低位置，称为下中天。 |
