For all you people out there needing information on Planet Mercury: for reports, research, or just personal enrichment, here's a short list of vital statistics on the first planet from the sun. Hope it can be of help to you all. Smile ^_^ p.s. The planet is grey... not blue. :P
Mass (kg) ............................... 3.303e+23 Mass (Earth = 1) ....................... 5.5271e-02 Equatorial radius (km) .................... 2,439.7 Equatorial radius (Earth = 1) .......... 3.8252e-01 Mean density (gm/cm^3) ....................... 5.42 Mean distance from the Sun (km) ........ 57,910,000 Mean distance from the Sun (Earth = 1) ..... 0.3871 Rotational period (days) .................. 58.6462 Orbital period (days) ...................... 87.969 Mean orbital velocity (km/sec) .............. 47.88 Orbital eccentricity ....................... 0.2056 Tilt of axis ................................. 0.00� Orbital inclination ......................... 7.004� Equatorial surface gravity (m/sec^2) ......... 2.78 Equatorial escape velocity (km/sec) .......... 4.25 Visual geometric albedo ...................... 0.10 Magnitude (Vo) ............................... -1.9 Mean surface temperature .................... 179�C Maximum surface temperature ................. 427�C Minimum surface temperature ................ -173�C Atmospheric composition Helium .................................... 42% Sodium .................................... 42% Oxygen .................................... 15% Other ...................................... 1%
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