Northern hemisphere
Northern Hemisphere
The Northern Hemisphere (/ˈnɔːrðən ˈhɛmɪsfɪər/; from Latin nord, "north", and sphaera, "sphere") 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.
Etymology
The term Northern Hemisphere is derived from the Latin words nord meaning "north", and sphaera meaning "sphere". The term is used to refer to the half of the Earth that is located north of the Equator.
Related Terms
- Equator: An imaginary line drawn around the earth equally distant from both poles, dividing the earth into northern and southern hemispheres and constituting the parallel of latitude 0°.
- Southern Hemisphere: The half of the Earth that is south of the Equator. It is the opposite of the Northern Hemisphere.
- Tropic of Cancer: A line of latitude located at approximately 23.5 degrees north of the Equator, marking the northernmost point at which the sun can appear directly overhead at noon.
- Arctic Circle: One of the five major circles of latitude that mark maps of the Earth. In the Northern Hemisphere, it is the parallel of latitude that runs 66°33′48.0″ north of the Equator.
- Prime Meridian: The meridian (line of longitude) at which longitude is defined to be 0°.
See Also
External links
- Medical encyclopedia article on Northern hemisphere
- Wikipedia's article - Northern hemisphere
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