Same action, different view. Sort of like having a fixed gnomon shadow and a rotating dial face
Astounding video... great, instructional experience. https://youtu.be/IYdl5509IhA
Time Lapse Sky Shows Earth Rotating Instead of Stars fixed audio https://youtu.be/IYdl5509IhA
--------------------------------------------------- https://lists.uni-koeln.de/mailman/listinfo/sundial