Earth
The big blue planet is our home, where water flows and life thrives. No other
planet is yet known to have life. Many scientific research satellites are in
orbit exploring Earth.
Planet Profile
Mass (kg)............................................5.98 x 10^24
Diameter (km)........................................12756
Mean density (kg/m^3) ...............................5520
Escape velocity (m/sec)..............................11200
Average distance from Sun (AU).......................1
Rotation period (length of day in Earth hours).......23.93
Revolution period (length of year in Earth days).....365.26
Obliquity (tilt of axis in degrees)..................23.4
Orbit inclination (degrees)..........................0
Orbit eccentricity (deviation from circular).........0.017
Mean surface temperature (K).........................281
Maximum surface temperature (K)......................310
Minimum surface temperature (K)......................260
Visual geometric albedo (reflectivity)...............0.39
Highest point on surface.............................Mount Everest
(over 8 km above sea-level)
Atmospheric components...............................78% nitrogen,
21% oxygen,
1% argon
Surface materials....................................basaltic and
granitic rock and
altered materials
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