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Homework Help: Mars/orbit problem

  1. Nov 7, 2007 #1
    The mean distance of Mars from the Sun is 1.52 time that of Earth from the Sun. From Kepler's law of periods, calculate the number of years required for Mars to make one revolution around the Sun; compare your answer with the value given in Appendix C.

    Kepler's Law of periods is: T^2=[4 x (pi)^2 x r^3]/[GM]

    Appendix C says the Period=1.88 y

    I have no idea how to begin this problem. Please help set me in the right direction.
  2. jcsd
  3. Nov 7, 2007 #2
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