Mackie concluded that ancient people probably built the ledge as an astronomical observation platform . 麦凯断定，古人筑起这个凸岩大概是为了作天文观测台用的。
An entirely new set of astronomical objects will become uncovered as we perfect observations throughout . 当我们把观测工作做得充分完善之时必将会发现一批全新的天体。
Common fractions written in the greek or egyptian system were too awkward for astronomical calculations . 用希腊人或埃及人那套办法写出来的普通分数很不便于作天文计算。
A serious problem in astronomical spectroscopy is imposed by the absorption of light in the earth's atmosphere . 地球的大气层对光线的吸收，给天文光谱学带来了严重的问题。
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。
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
Newton and other scientists used the law of gravitation, that marvel of simplicity and university, to build a comprehensive picture of the astronomical universe . 牛顿和其他科学家运用这个简单和普遍适用的奇迹引力定律，建立了天体世界内容广泛的画面。
The astronomical clock , invented by the chinese scientist su song over 800 years ago , was the first of its kind in the world. it gave the correct time of the day and night , as well as the sunrise and the sunset . 中国科学家苏颂800多年前发明的天文钟是世界上最早的天文钟。
