Spheres and orbs in Copernicus
Question 1: Using an 8.5x11 inch sheets of graph paper and a compass, draw Copernicus' cosmic scheme to scale using the figures indicated below. Label the spherical shell -- or orb -- corresponding to each object, in the correct order. (Ptolemy's figures from Exercise 5 are given for comparison.)
Question 2: On the sheet provided, figures 2A and 2B show Ptolemy's Almagest model for the sun and for the moon, with the corresponding three-dimensional orb models. Figures 2C and 2D show Copernicus's models for the moon and for an outer planet. What would the corresponding orb models look like?