Jupiter
Saturn
Diameterkm
139,820
116,460
Mass (Earth = 1)x
317.80
95.16
Surface Gravitym/s²
24.79
10.44
Mean Temperature°C
-110
-140
Distance from SunAU
5.20
9.54
Orbital Perioddays
4,331
10,747
Day Lengthhours
9.93
10.66
Known Moons
95
146
Axial Tilt°
3.13
26.73
Orbital Velocitykm/s
13.07
9.68
Quick Facts
Jupiter
- -Jupiter's Great Red Spot is a storm large enough to swallow Earth and has been raging for at least 350 years.
- -Jupiter has the shortest day of any planet -- it completes one rotation in just under 10 hours.
- -Jupiter's magnetic field is about 20,000 times stronger than Earth's.
- -Europa, one of Jupiter's moons, likely has more water in its subsurface ocean than all of Earth's oceans combined.
Saturn
- -Saturn is less dense than water (0.687 g/cm³) -- it would float in a bathtub large enough to hold it.
- -Saturn's rings are mostly ice and extend up to 282,000 km from the center, but are only about 10 meters thick.
- -Saturn has 146 confirmed moons, the most of any planet in the solar system.
- -Winds near Saturn's equator can reach 1,800 km/h -- the fastest in the solar system.