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STEP 1: Solve for "a." Kepler's Third Law, P squared = a cubed (period squared = length of semi major axis cubed). Mars - Sun distance (a.u.) = 1.52 Earth - Sun distance (a.u.) = 1.00 Total = 2.52 One half of Total - or - a = 1.26 STEP 2: Take the cube of "a" and then take the square root of that number. |