相对论天体测量学中的基本概念和定义

Basic Conceptions and Definitions of Relativistic Astrometry

本文讨论了相对论天体测量学中有关天球和天体方向的基本概念，给出了本征方向、自然方向、坐标方向、质心天球方向和视差、光行差、光线引力偏折的概念性定义及其在一般度规形式下的数学表达式。

The Present paper deals with the basic conceptions of celestial sphere and celestial direction in the relativistic astrometry. The conceptual definitions and their mathematical expressions of the proper direction, the natural direction, the coordinate direction and the barycentric celestial direction, as well as the parallax, the aberration and the light deflection are given in the general metric form.