<P> Ganymede is the largest and most massive moon in the Solar System . Its diameter of 5,268 km is 0.41 times that of Earth , 2 % larger than that of Saturn 's Titan ( the second - largest moon ) , 1.08 times Mercury 's , 1.09 times Callisto 's , 1.45 times Io 's and 1.51 times the Moon 's . Its mass is 10 % greater than Titan 's , 38 % greater than Callisto 's , 66 % greater than Io 's and 2.02 times that of the Moon . </P>
<P> Ganymede is the largest and most massive moon in the Solar System . Its diameter of 5,268 km is 0.41 times that of Earth , 2 % larger than that of Saturn 's Titan ( the second - largest moon ) , 1.08 times Mercury 's , 1.09 times Callisto 's , 1.45 times Io 's and 1.51 times the Moon 's . Its mass is 10 % greater than Titan 's , 38 % greater than Callisto 's , 66 % greater than Io 's and 2.02 times that of the Moon . </P>
how big is ganymede compared to earth 's moon
how big is ganymede compared to earth 's moon
1.51 times the Moon 's
1.51 times the Moon 's