| Mean magnetic field density at surface |
Mean atmospheric surface density |
Mean atmospheric surface pressure |
Percentage atmospheric composition by compound | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| (gauss) | (relative) | (millibars) | (relative) | H | He | N2 | O2 | Ar | CH4 | NH3 | CO2 | Others | |
| Mercury | 0.003 | 0 | 10-12 | 10-12 | Trace | Trace | Trace | Trace | Trace: K, Na (Origin: vapourised from surface) |
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| Venus | < 2 ×10-5 | 15 | 88131 | 87 | 3.5% | 0.1% | 96% | 0.4% of Ne, Kr, S, OH2 | |||||
| Earth | 0.31 | 1 | 1013 (870-1083.8) |
- | Trace | 78.09% | 19.95% | 0.93% | Trace | Trace | 0.03% | Trace | |
| Luna | < 0.003 | 0 | 0 | 0 | Frozen OH2 in craters at poles |
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| Mars | < 0.0003 | 0.008 | 6 | 0.006 | Trace | Trace | 2.7% | 0.15% | 1.6% | 95% | 0.55% | ||
| Jupiter | 4.28 | - | - | - | 86% | 14% | Trace | Trace | Trace: NH3SOH | ||||
| Io | Sulphur | ||||||||||||
| Callisto | ♦ | ||||||||||||
| Ananke | Sulphur from Io | ||||||||||||
| Saturn | 0.22 | - | - | - | ♦ | ♦ | ♦ | ♦ | |||||
| Miamas | ♦ | ♦ | ♦ | CO, hydrocarbons, acetylene, HNO3 |
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| Titan | 1496 | 1.48 | 85% | 14% | 1% | Trace | ethane, ethylene, acetylene, hydrogen cyanide (3 ppm) |
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| Uranus | 0.23 | - | - | - | ♦ | ♦ | ♦ | ||||||
| Neptune | 0.14 | - | - | - | ♦ | ♦ | ♦ | ||||||
| Triton | ♦ | ♦ | |||||||||||
| Pluto | ♦ | ♦ | |||||||||||