Articles

Armillary sphere

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An armillary sphere (variations are known as spherical astrolabe, armilla, or armil) is a model o…

Northern Hemisphere

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The Northern Hemisphere is the half of Earth that is north of the equator. For other planets in t…

Cantino planisphere

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The Cantino planisphere or Cantino world map is a manuscript Portuguese world map preserved at th…

Western Hemisphere

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This article or section appears to contradict itself on the definition of its subject ; its own s…

Linguasphere Observatory

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The Linguasphere Observatory (or the Observatoire, based on its original French and legal title: …