Which latitude line runs exactly at 0 degrees?

The Equator runs exactly at 0 degrees latitude. It is the fundamental line used to divide the Earth into the Northern and Southern Hemispheres, making it a critical reference point in geography and navigation. The Equator is situated equidistant from the North and South Poles, which helps in understanding climate patterns, as regions along this line typically experience a tropical rainforest climate with minimal temperature variation throughout the year.

The Tropic of Capricorn is located at approximately 23.5 degrees South latitude, the Prime Meridian is at 0 degrees longitude (not latitude), and the International Date Line is generally at 180 degrees longitude. Each of these has its own significance in cartography and geography, but they do not correspond to the 0-degree latitude line that the Equator represents.