Kepler's Laws--What am I doing wrong here? 1. The problem statement, all variables and given/known data Io, a satellite of Jupiter, has an orbital period of 1.77 days and an orbital radius of 4.22 x 10^5km. From these data, determine the mass of Jupiter. 2. Relevant equations T^2=(4(pi)^2/GM)r^3 3. The attempt at a solution I converted the radius from km to meters and substituted all of the numbers to their variables. However, I still came up with the wrong answer. Please help me check my work, thanks! Divided r^3 from both sides: (1.77)^2/(4.22x10^8m)^3= 4(pi)^2/(6.673 x 10^-11)M Multiplied universal gravitation constant with M(mass) on both sides: (4.1688x10^-26)(6.673x10^-11)M=4(pi)^2 solved for M: M=4(pi)^2/ (2.78184 x 10^-36) I came up with: 1.4192 x 10^37 The correct answer is: 1.90 x 10^27 kg What am I doing wrong? Thanks!!