Even if you measured carefully, and didn't make any mistakes (thus eliminating "human error"), you likely still found that your final calculated mass result didn't quite match the known mass of Jupiter. Given the method you used in this exercise to calculate Jupiter's mass, which of the following explanations best explains that might be. (Even if you did happen to get exactly the known mass, you can still speculate on why getting the exact mass was an unlikely bit of luck.) Question 7 options: The equation used was an approximation and didn't included the mass of Ganymede (1.4x1023 kg). The use of simple rulers and the limited size of the graph introduced uncertainties in both the measured diameter of Jupiter and the measured distance to Ganymede. Unevenness of the surface of Ganymede wasn't considered. Jupiter's rotation wasn't considered