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Mercury basics. Closest to Sun (0.4 AU), 10th largest worldOrbit -88 Earth daysSurface gravity -3.7 m/s2 (38% of Earth)10-14 bars of pressure (negligible)Temperatures- 800 oF in day (second hottest) - -300 oF at nightWeak magnetic fieldSpacecraft- Mariner 10. As The
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