Earth
Jupiter
Diameterkm
12,742
139,820
Mass (Earth = 1)x
1.00
317.80
Surface Gravitym/s²
9.81
24.79
Mean Temperature°C
+15
-110
Distance from SunAU
1.00
5.20
Orbital Perioddays
365.25
4,331
Day Lengthhours
24.00
9.93
Known Moons
1
95
Axial Tilt°
23.44
3.13
Orbital Velocitykm/s
29.78
13.07
Quick Facts
Earth
- -Earth is the only planet not named after a Greek or Roman deity.
- -Earth's rotation is gradually slowing -- days are getting about 1.4 milliseconds longer per century.
- -About 71% of Earth's surface is covered by water, but 96.5% of that water is in the oceans.
- -Earth's magnetic field has flipped its polarity hundreds of times over millions of years.
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.