Zenith On the International Space Station, "zenith" and "nadir" are used instead of "up" and "down", referring to directions within and around the station, relative to the earth. Zenith The zenith is an imaginary point directly "above" a particular location, on the imaginary celestial sphere. "Above" means in the vertical direction opposite to the apparent gravitational force at that location. The opposite direction, i.e. the direction in which gravity pulls, is toward the nadir. The zenith is the "highest" point on the celestial sphere. The word "zenith" derives from an inaccurate reading of the Arabic expression (), meaning "direction of the
Nadir Afonso artworks Nadir Afonso artworks This is a list of Nadir Afonso artworks: paintings, engravings, and architecture. All data was sourced from websites (linked to) and from the books and catalogues listed in the main Nadir Afonso article. Titles are shown in their original language as conceived by the artist, and translated if needed, except the titles made of place names, which are shown in the English form. Multiple-source inconsistencies are shown in the Notes column. The artist's method usually involves one or more studies before the final artwork, which sometimes is revealed only years later; the artist also sometimes returns to