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 Study the chart below to recognize similarities and differences between Titan, Earth's moon, and Mars.NOTE: xo Kelvin = xo Celsius - 273. |
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| Earth | Moon | Mars | Titan | |
| Mass Earth = 1.0 | 1 | 0.012 | 0.108 | 0.0226 |
| Equatorial Radius (km) | 6738 | 1738 | 3380 | 2575 |
| Mean Density (g/cm3) | 5.52 | 3.34 | 3.97 | 1.88 |
| Escape Velocity (km/sec) | 11 | 2.38 | 5 | 2.65 |
| Surface Temperature (degrees Celsius) |
15 | (day) 130 (night) 200 |
mean -23 | mean -178 |
| Gravitational Acceleration (cm/sec2) | 982 | 164 | 376 | 186 |
| Mean Time for Light to Reach Earth | n.a. | 1.28 seconds | 12.66 minutes | 1.32 hours |
| Mean Distance from Sun (million km) | 149.6 | 149.6 | 227.9 | 1427 |
| Length of Day | 24 hours | 29.5 days | 24 hours 37 minutes |
9.54 hours |
| Atmosphere | 78% nitrogen 21% oxygen .036% carbon dioxide |
none | 90% carbon dioxide |
methane hydrogen |
| Atmospheric Pressure | .987 bars | none | equivalent to Earth at 20 miles |
1.5 bars |
| Appearance of Launch Window |
n.a. | Any time | Every two years | Every year |