Equator

"Well, I never crossed the equator in my life before... but now I did it. We did it. We just did it. We're in Brazil. That's south of the equator."

--Su Ji-Hoon, The Last Capoeira

An equator is the intersection of the surface of a rotating spheroid (such as a planet) with the plane perpendicular to the axis of rotation and midway between its poles.

On Earth, the Equator is an imaginary line on the surface, equidistant from the North and South Poles, dividing the Earth into Northern and Southern Hemispheres. It is about 40,075 kilometers (24,901 miles) long, of which 78.7% lies across water and 21.3% over land.