Ironically, the detailed reasons as to how the radio beam is produced may not be important astronomically . 具有讽刺意义的是，产生射电波束的详细原因在天文上，这也许并不重要。
Two standard astronomical techniques have been used in the search for possible time variations in the solar output . 为了探索太阳输出可能存在的时间变化，还采用了两种标准的天文技术。
To try to understand the physical nature of an astronomical phenomenon, one must try to understand its parentage . 在试图了解一个天文现象的物理本质时，人们必然要力图弄清楚它的渊源。
The almanac also noted the days when the sun would be far north or south, when moon would be full, and when the tides would be high or low . 这份年鉴还记载着太阳南归、北归、望月、涨潮和落潮等天文现象的日期。
A number of astronomical observations and experimental result were known to newton when he first tried to understand the dynamics of bodies . 当牛顿首先试图去了解天体的力学问题时，他已经知道了许多天文的观测及实验结果。
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
On the cortex . history , astronomy , it ' s not in there 历史和天文记录都没有提到它
On the cortex . history , astronomy , it ' s not in there 历史和天文记录都没有提到它
Self - learning astronomy course nature of the universe 自学天文课程宇宙的本质
Local astronomy organizations or personal astronomy 本地公开天文团体或个人天文网页
