我们曾经在2017年第7期和第11期里介绍过如何观察恒星的周日视运动,这一期我们要给同学们介绍怎样观察恒星的周年视运动。首先,给同学们介绍一些基本概念。一、恒星日与太阳日观察过星空的同学都知道一个常识,就是恒星每天比前一天要早升起大约4分钟。换句话说,恒星每天都在空 We have introduced how to observe the sun’s Sunday watching movement during the 7th and 11th of 2017. In this issue, we will give the students an introduction on how to observe the stars’ annual watching movement. First, introduce some basic concepts to classmates. First, the stellar day and the sun observing the stars of the students all know a common sense, that is, stellar day before the day before rising about 4 minutes. In other words, the stars are empty every day