| 1. | Seen from the earth, the sun rotates in about 27 days .
从地球上观测，太阳的自转周期约为27天。 |
| 2. | For geophysical purposes it is customary to use solar rotations of 27. 0 day .
为适应地球物理学的需要，习惯上以270日为太阳自转周期。 |
| 3. | Astronomical yearbooks and calendars for amateur astronomers provide the times of the beginning of the synodic solar rotations as well as the longitudes lo .
天文年历和日历为业余天文学家提供了太阳会合自转周期的始时和经度Lo |
| 4. | Extrapolating backward , it was born rotating once every 20 milliseconds
因此回溯到它刚诞生的时候，自转周期应是20毫秒。 |
| 5. | For geophysical purposes it is customary to use solar rotations of 27 . 0 day
为适应地球物理学的需要，习惯上以27 0日为太阳自转周期。 |
| 6. | Moreover , the time for charon to go around pluto is the same as the rotational period of pluto . therefore , charon is a
此外，查戎的公转周期和冥王星的自转周期一样，所以它是一颗 |
| 7. | Due to the existence of high viscosity in strange matter , strange stars can reach much shorter period than neutron stars
由于奇异星有很高的粘度，它的自转周期会比中子星短得多。 |
| 8. | Is 29 . 5 days . interestingly , the rotational period of the moon relative to the sun is exactly the same as the synodic period
盈亏月。月球的自转周期刚好和它的绕地公转周期相等，这种情形称为 |
| 9. | Astronomical yearbooks and calendars for amateur astronomers provide the times of the beginning of the synodic solar rotations as well as the longitudes lo
天文年历和日历为业余天文学家提供了太阳会合自转周期的始时和经度lo |
| 10. | Hyperion is about 250 kilometers across , rotates chaotically , and has a density so low that it might house a vast system of caverns inside
土卫七的大小约为250公里，自转周期混乱，而且密度很，所以内部可能拥有一个广泛的洞穴系统。 |
