I read Glenn Chaple's January 2014 installment of Observing Basics named "Astro-freebies" and got interested in the do-it-yourself star wheel discussed in one paragraph (Uncle Al's Star Wheel).
So I went over to the star-wheel website via the pbs website in the article.
Now I have a question regarding the design of the wheel:
There is an oval hole in the wheel holder, which shows the current sky depending on date and time.
But surely this horizon must depend also on the latitude of the user?
I suspect that the creator (Uncle Al) has used some median latitude of the USA, which will be some 40 deg N lat.
But since I live at 60 deg N lat I probably have to move the cut-out oval in some direction to make the stardome more correct. But in what direction and by how much?
I would like to know how to modify the pattern of the holder such that my grandsons could create a star wheel that works in our latitude.
Any insights welcome!