Please help.... Given that the distance to the sun from the earth is 1.5*10^11 m and the the mass of the sun is 1.9*10^30 kg. Using Keplers law find the period of the earth's orbit recorded in seconds; show how to express your anwser in years; and if your anwser does not agree with the accepted earth's orbital period of 365.25 days, explain the discrepancy. I am totally lost using Keplers law, I need your help ... Thanks!