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The Solar System
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The Planets - Summary.
| Mercury | Venus | Earth | Mars | Jupiter | Saturn | Uranus | Neptune | Pluto | |
| Mass | 0·05 | 0·8 | 1·0 | 0·1 | 318 | 95 | 14·5 | 17 | 0·002 |
| Diameter | 4·9 | 12·0 | 12·8 | 6·8 | 143 | 120 | 51 | 49·5 | 2.3 |
| Orbit Time | 0·24 | 0·62 | 1·0 | 1·9 | 12 | 29·5 | 84 | 165 | 248 |
| Distance | 58 | 108 | 150 | 228 | 780 | 1430 | 2870 | 4500 | 5900 |
| Orbital Speed | 48 | 35 | 30 | 24 | 13 | 10 | 7 | 5·5 | 4·8 |
Mass is given relative to the Earth.
Diameter is given in thousands of kilometres.
Orbit time is given in years.
Distance from the planet to the Sun is given in millions of kilometres.
The distance is an average value for the slightly elliptical
orbit.
Orbital
speed is given (approximately) in kilometres per second.
Notice that the
orbital speed
decreases as the distance from the Sun
increases.
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