Quick Facts About Planet Earth

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Listed here are some quick facts about earth as a planet.


The earth is estimated to be 4.6 billion years old.


The mass of the earth is calculated to be 5.976 ×1024 kilograms.  The unit of mass equivalent to that of the earth is referred to as the Earth mass (M).  


The volume of the earth is about 1,083,210,000,000 km3 (2.5988×1011 cu mi).

Mean Density

The mean density of the earth is 5.518 kg/liters.


The earth is not a perfect sphere.  The shape of the earth is an oblate spheroid or a geoid.


Polar diameter 12,713.54 km;  Equatorial diameter 12,756,32 km; Polar circumference 40,008.00 km and Equatorial circumference 40,075.16 km.


Total surface area 509,7000,000 sq. km; Land area about 148,400,000 km (about 29 per cent of the total area); Water area about 361,300,000 sq. km. (about 71 per cent of the total surface area).

Motion of the Earth

Rotation (spinning motion on polar axis), once every 23 hours 56 minutes and 4.09 seconds.

Revolution (around the sun), once every 365 days, 6 hours, 9 minutes and 9.54 seconds.

Surface Features

Highest point on land – Mt Everest 8,848 m above the sea level.

Lowest area on land- shore of Dead Sea (399 m below sea level). Mean height of land 756 m.

Ocean Depths

Deepest area – Mariana Trench in Pacific Ocean south-west of Guam (11,033 m below the sea surface). Average depth of oceans 3,730 m.

Chemical make up of the Earth’s Crust

(percent by weight): oxygen 46.6, silicon 27.7, aluminium 8.1, iron 5.0, calcium 3.6, sodium 2.8, potassium 2.6, magnesium 2.0 and other elements 1.6.


Mean Surface Temperature       : 14°C

Highest temperature of 70.7 degrees C (159 degrees F) at Lut Desert measured in 2005.

Lowest temperature measured at minus 136 F (minus 93.2 C) on August 10, 2010 in pockets between Dome Argus and Dome Fuji, two summits on the ice sheet known as the East Antarctic.


Inclination of the Polar Axis to the Orbital Plane        :  23 deg. 26 min. 59 second.

Orbital Speed

Orbital Speed    :  29.8 km/s

About the Sun Mean Distance

From the Sun : 149,598,500 km (one astronomical unit). The maximum distance at the time of aphelion between July 2 and 5 is about 152 million km and the minimum distance at perihelion between January 2 and 5 is about 147 million km.


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