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
Canadian Rockies in North America
The equator is the circle of latitude that divides Earth into the Northern and Southern Hemispheres. It is an imaginary line located at 0 degrees latitude, about 21,639 nautical miles in circumference
The equator marked as it crosses Ilhéu das Rolas, in São Tomé and Príncipe
The Marco Zero monument marking the equator in Macapá, Brazil
GPS reading taken on the equator close to the Quitsato Sundial, in Cayambe, Ecuador
Sign on the equator in San Antonio de Pichincha, Ecuador