Sekido

Sekido (赤道), meaning "equator" in Japanese, refers to the great circle on a sphere or planet that is equidistant from its poles. More specifically, in the context of Earth, the sekido is the imaginary line that circles the Earth midway between the North and South Poles. It divides the Earth into the Northern Hemisphere and the Southern Hemisphere.

The sekido is designated as 0 degrees latitude. Lines of latitude are measured in degrees north or south of the sekido, ranging from 0 degrees at the sekido to 90 degrees north at the North Pole and 90 degrees south at the South Pole.

The length of the Earth's sekido is approximately 40,075 kilometers (24,901 miles). Regions located near the sekido tend to have relatively consistent temperatures throughout the year, with less seasonal variation compared to regions at higher latitudes. The sekido also experiences the highest average rainfall in many parts of the world due to the intertropical convergence zone (ITCZ).