The neat part about this...is that with just two angles and a little timing I came up with a useable astronomic coordinate.The method makes no pretens...

From, Howse, D. (1997). Greenwich time and the longitude. London: Philip Wilson.Indeed, even the Greenwich meridian itself is not quite what it used t...

The picture quality?What can we do about that?

Sorry, I went over the 5000 character limit for a post.I have not considered Einsteins’ General Relativity, which causes a deflection of the path of l...

Center SquareI purchased mine from Rocklers. $27 delivered in two days. Made of hardened steel it should last a career or two.It will find the cente...