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Nations or territories that touch the Equator (red) or the IERS Reference Meridian (blue)

An equator is the intersection of a sphere's surface with the plane perpendicular to the sphere's axis of rotation and midway between the poles. The Equator usually refers to the Earth's equator: an imaginary line on the Earth's surface equidistant from the North Pole and South Pole, dividing the Earth into the Northern Hemisphere and Southern Hemisphere. Other planets and astronomical bodies have equators similarly defined. Earth's equator is about {{safesubst:#invoke:convert|convert}} long; 78.7% is across water and 21.3% is over land.

Equator sections
Intro   Geodesy of the Earth's Equator    Equatorial seasons and climate    Equatorial countries and territories    Crossing the Equator    Exact length    Climate    See also    Notes    References    External links   

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