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。
2.
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
3.
Proving to all . . . solar rotation 向世人证明了。 。 。太阳的自转！
4.
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。
5.
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
