Should Equator Be Capitalized?

Here the words equator, north pole and universe need no capitals, because they aren't strictly proper names. Some people choose to capitalize them anyway; this is not wrong, but it's not recommended.

Do you capitalize equator and prime meridian?

Geographical Names. Capitalize place names when these terms are accepted as proper nouns. ... Lowercase terms for abstract geographical measures, such as equator, equatorial Africa, prime meridian, tropic of Cancer, west, east, south, north.

Should hemisphere be capitalized?

Names of hemispheres may be capitalized or lowercased, although capitalizing is more common, particularly in academic writing. The Chicago Manual of Style suggests capitalizing, while Merriam-Webster, in its dictionary entries, shows the names of hemispheres lowercased, with the capitalized forms listed as variants.