Jupiter
Mars
Diameterkm
139,820
6,779
Mass (Earth = 1)x
317.80
0.11
Surface Gravitym/s²
24.79
3.72
Mean Temperature°C
-110
-65
Distance from SunAU
5.20
1.52
Orbital Perioddays
4,331
687
Day Lengthhours
9.93
24.66
Known Moons
95
2
Axial Tilt°
3.13
25.19
Orbital Velocitykm/s
13.07
24.07
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.
Mars
- -Olympus Mons on Mars is about 21.9 km tall -- nearly three times the height of Mount Everest.
- -A Martian day (sol) is 24 hours and 37 minutes, remarkably similar to an Earth day.
- -Mars has seasons like Earth because its axial tilt (25.19°) is very similar to Earth's (23.44°).
- -Dust storms on Mars can grow large enough to engulf the entire planet and last for months.