Motion of the Sun
Find out the latitude and longitude of your town/city.
Use the activity to see the path of sun over a given day or year.
Imagine that you set up a camera (at a fixed location) to take a photograph of the sky at the exact same time of day every two weeks. Superimposing these images for an entire year will show the Sun's 'analemma'. The 'analemma' is the position of the sun in the sky as observed from a fixed point at the exact same time (on any given day) over the course of a year.
'Analemma' comes from the Greek for 'support'. Think 'sling' or even 'slingshot'!
Is there anywhere on the planet where there are zero hours of sunlight on a given day?