A hemisphere is one half of the earth. Our earth is in spherical shape and when it cuts down to be divided into two equal parts then it`s called hemisphere.
As marked there are generally 4 hemisphere ( Eastern, Western, Northern and Southern ). The equator or the line of 0 degree latitudes divides the earth into Northern and Southern hemisphere. And prime meridian or the line of 0 degree longitude divides the earth in Eastern and Western hemisphere.
There major latitudes are named as Tropic of Cancer, Tropic of Capricorn Equator ( line of 0 degree ), The Artic circle and The Antarctic circle.
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