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我们曾经在2017年第7期里介绍过观察恒星的视运动,那里举的例子是站在北半球中纬度地区(例如北纬40°),面对南方,观察南面天空中的星座。看上去位于南面天空中的星星跟太阳一样东升西落,视运动的轨迹也是倾斜的半圆,从东到南再到西。这一期我们要带同学们(仍然是在北半球中纬度地区,例如北纬40°),转身面对北方,观察北面天空中星座的周日视运动。
We introduced the observation of stars in the seventh episode of 2017. The example here is standing in the mid-latitude region of the northern hemisphere (eg, 40 ° N), facing south and observing the constellations in the southern sky. It seems that the stars in the southern sky rise and fall like the sun, depending on the trajectory of the movement is also a semi-circle inclined from east to south and then west. In this issue, we will bring students (still in the middle latitudes of the northern hemisphere, such as 40 ° N) and turn to the north to observe the Sunday vision of the constellations in the northern sky.