Mars
Jupiter
Diameterkm
6,779
139,820
Mass (Earth = 1)x
0.11
317.80
Surface Gravitym/s²
3.72
24.79
Mean Temperature°C
-65
-110
Distance from SunAU
1.52
5.20
Orbital Perioddays
687
4,331
Day Lengthhours
24.66
9.93
Known Moons
2
95
Axial Tilt°
25.19
3.13
Orbital Velocitykm/s
24.07
13.07
Quick Facts
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.
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.