Linked from
The 9 pages that link to Hemisphere, each with the reason it gives.
SphereBroader topic: It is a specific region obtained by cutting a sphere through its center.
Solid angleBroader topic: It occupies half of all directions, or 2π steradians.
Spring (season)Related: Spring occurs at opposite times in the Northern and Southern Hemispheres.
WinterRelated: Winter occurs at opposite times in the Northern and Southern Hemispheres.
Eastern HemisphereNarrower topic: The Eastern Hemisphere is one of Earth’s longitudinal halves.
Buys Ballot's lawRelated: The law’s left-right direction changes across Earth’s hemispheres.
Land and water hemispheresNarrower topic: Each land or water hemisphere is one half of Earth.