4. Third rock from the Sun - restless Earth

Basic data

Physical properties of the Earth

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Mass 5.974 x 1024 kilograms
Mean radius 6.371 x 106 meters
Mean mass density 5.515 kilograms per cubic meter
Rotation period 23 hours 56 minutes 04 seconds = 8.6164 x 104 seconds
Orbital period 1 year = 365.24 days = 3.1557 x 107 seconds
Mean distance from Sun 1.49598 x 1011 meters = 1.000 AU
Age 4.55 x 109 years
Atmosphere 71 percent nitrogen, 28 percent oxygen
Surface pressure 1.013 bars at sea level
Surface temperature 288 to 293 degrees kelvin
Magnetic field strength 0.305 x 10-4 tesla at the equator
Magnetic dipole moment 7.91 x 1015 tesla meters cubed
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Copyright 2010, Professor Kenneth R. Lang, Tufts University