It keeps things simple by using a cheap 24 hour clock movement to rotate a GoPro as the Earth spins. The result is a time-lapse where the stars appear to be stationary while the horizon rotates.

[Matthew] designed motor pin replacements specifically for Sunbeam electric movements, the relatively inexpensive alternative that graced many a mid-century household clock. He only had the ...

Movement could be mechanically driven or happen as a result of natural effects. Image caption, Astronomical Clock, Prague, Mikulas of Kadan and Jan Sindel, 1410, Peter Scholey / Alamy Stock Photo ...