Northern Hemisphere

"In the Northern Hemisphere, my village and my country, like most of us humans, are located in there, in the Northern Hemisphere. Most of the battles in World War III took place in the Northern Hemisphere. So, what's next, will it spread to the Southern Hemisphere by crossing the equator?"

--Su Ji-Hoon, The Fate of the Northern Hemisphere

The Northern Hemisphere is the half of Earth that is north of the equator. For other planets in the Solar System, north is defined as being in the same celestial hemisphere relative to the invariable plane of the solar system as Earth's North pole.