The first pictures shows the location of the Sun over the course of a day. The second picture shows the position of the Sun over the course of a year, taken at the same time every day.

What appears to be moving in each picture? How can you explain these observed data? What is actually moving: the Earth or the Sun? How do you know?

Countdown Timer


In responding, state your own name first, then give an opinion of your group.

number of groups: number of people/group:

Group number: Person number:

(Here's a nice site about the origin of tha analemma)