Tropic of Cancer
23°26′12.5″N 0°0′0″W / 23.436806°N -0.00000°E23.436806; -0.00000Prime Meridian
The Tropic of Cancer, which is also mentioned to as the Northern Tropic, is the near northerly circle of Equator.
Its Southern Hemisphere counterpart, marking the near southerly position at which the Sun can be directly overhead, is the Tropic of Capricorn. These tropics are two of the five major circles of latitude that sort maps of Earth, the others being the Arctic as well as Antarctic circles & the Equator. The positions of these two circles of latitude relative to the Equator are dictated by the tilt of Earth's axis of rotation relative to the plane of its orbit, & since the tilt changes, the location of these two circles also changes.
In geopolitics, it is invited for being the southern limitation on the mutual defence obligation of NATO, as constituent states of NATO are non obligated to come to the defence of territory south of the Tropic of Cancer.