Category:Nodus-based sundials

From Wikimedia Commons, the free media repository
Jump to: navigation, search

This category groups media relating to nodus-based sundials, those that tell time from the movement of the shadow of a point (the nodus) or from the movement of a spot of sunlight passing through an aperture. Since the sun moves approximately on a circle on the celestial sphere over the course of one day, the nodus traces out a conic section if it falls on a plane.

Subcategories

This category has the following 5 subcategories, out of 5 total.

Media in category "Nodus-based sundials"

The following 99 files are in this category, out of 99 total.