1. The problem statement, all variables and given/known data How long is it between subsequent transits of New Sol by New Earth How long does each transit last? Assume that the transit is central, i.e. the projected path of the planet goes right over the center of the star 2. Relevant equations Rp=(vp+vs)(t2-t1)(1/2) 3. The attempt at a solution Not sure which problem goes with the formula, i thought it would go with how long transit last but got the answer as 427s which seems way to fast also the second problem says that i=90 but formula does not have an i so does it go with the first one or neither?