Saturn
Pluto
Diameterkm
116,460
2,377
Mass (Earth = 1)x
95.16
0.00
Surface Gravitym/s²
10.44
0.62
Mean Temperature°C
-140
-230
Distance from SunAU
9.54
39.48
Orbital Perioddays
10,747
90,560
Day Lengthhours
10.66
153.29
Known Moons
146
5
Axial Tilt°
26.73
122.53
Orbital Velocitykm/s
9.68
4.67
Quick Facts
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.
Pluto
- -Pluto was reclassified from planet to dwarf planet in 2006 by the International Astronomical Union.
- -Pluto's largest moon Charon is so large (half Pluto's diameter) that they orbit a point between them, forming a binary system.
- -Pluto's famous heart-shaped feature, Sputnik Planitia, is a vast plain of nitrogen ice over 1,000 km across.
- -One year on Pluto takes 248 Earth years -- it hasn't completed a single orbit since its discovery in 1930.