1) What is Kepler's First Law?
2) In this experiment, there are eight pairs of photographs. In each pair, what things are the same in each? What things are different?
4) In this experiment, there are eight pairs of photographs, giving eight points along the orbit of Mars. If you were given more pairs of photographs would the result be better or worse? Would the final result for the orbit be better or worse? Why?
This procedure for finding the orbit of Mars will work for any planet farther away from the Sun that the Earth. Which planets are these?