Why does the Gnomon on a Sundial Point South?
The pointy bit of a sundial is called a ‘gnomon’. It is the part that casts the shadow and in the northern hemisphere it points…
Tag: sundials
Solar-Heated Water Tanks
If anything depends on the sun to work effectively, then it can be used to find direction. Sundials and solar panels are two favourites, but…
Analemmas and the Equation of Time
If you stood on the same spot and took a photo of the sun every day during a year’s worth of good weather, at exactly…