Science - Physics. Size of the earth

Physics
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How big is the earth?
Nov 6th, 2014

The mean radius of Earth is 3,959 miles (6,371 kilometers). However, Earth is not quite a sphere. The planet's rotation causes it to bulge at the equator. Earth's equatorial diameter is 7,926 miles (12,756 kilometers), but from pole to pole, the diameter is 7,900 miles (12,720 km) — a difference of only 40 miles (64 km).

Reference:

http://www.space.com/17638-how-big-is-earth.html


Nov 6th, 2014

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