What is a hemisphere of a globe?

There are 4 hemispheres, eastern, western, southern, and northern. The Equator, or line of 0 degrees latitude, divides the Earth into the Northern and Southern hemispheres. It is also known as a half-sphere. And geographers, or people who study Earth, have divided the planet into two sets of two hemispheres. These are the Northern and Southern hemispheres and the Eastern and Western hemispheres.

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