Space Facts
| Planet | Distance from the Sun in astronomical units (One astronomical unit is equal to the distance between the Earth and the sun or about 93,000,000 miles.) | Rotation | Size as Compared to the Earth (Earth = 1) The radius of the Earth at the equator is 3,963 miles and at the poles is 3,950 miles. |
Orbital Period as Compared to Earth Years | Gases in Atmosphere | Number of Moons |
| Mercury | .388 | Once every 58.65 Earth days | .382 |
.24 |
None | 0 |
| Venus | .722 | Once every 243.01 Earth days | .949 |
.62 |
Carbon Dioxide, Nitrogen |
0 |
| Earth | 1.000 | Once every 23.934 Earth hours | 1.000 | 1.00 | Nitrogen, Argon, Oxygen, Water |
1 |
| Mars | 1.524 | Once every 24.366 Earth hours | .529 | 1.88 | Carbon Dioxide, Nitrogen, Argon, Oxygen |
2 |
| Jupiter | 5.203 | Once every 9.83 Earth hours | 11.21 | 11.86 | Hydrogen, Helium |
16 |
| Saturn | 9.539 | Once every 10.23 Earth hours | 9.46 | 29.46 | Hydrogen, Helium |
20 |
| Uranus | 19.19 | Once every 17.2 Earth hours |
4.01 | 84.01 | Hydrogen, Helium | 15 |
| Neptune | 30.6 | Once every 16.11 Earth hours |
3.88 | 164.8 | Hydrogen, Helium, Methane | 8 |
| Pluto | 39.6 | Once every 6.39 Earth days |
.18 | 247.7 | Nitrogen | 1 |