The approximate diameters of Saturn and Uranus are listed below:

Saturn: 1.21×10^5
Uranus: 5.11*10^4
What's the difference between the diameters of the two planets? Express your answer using either standard notation

To find the difference between the diameters of Saturn and Uranus, we subtract the diameter of Uranus from the diameter of Saturn:

1.21*10^5 - 5.11*10^4 = 7.08*10^4

Therefore, the approximate difference in diameters between Saturn and Uranus is 7.08*10^4.