在中学讨论有关天体运动问题,由于涉及的物理量多,公式推导变化大,其表现形式各异,往往还有隐含的特定条件,这就给解决问题带来困难,常会出现错误。下面作有针对性的辨析。 In the discussion of celestial body movement in secondary schools, due to the large number of physical quantities involved and the large derivation of formulas, their manifestations are various and there are often implied specific conditions. This brings difficulties in solving problems and often leads to errors. The following makes a targeted analysis.