DescriptionZenith-Nadir-Horizon-sr.svg English: An SVG to show the relationship between Zenith, Nadir, Horizon. Date 10 June 2009 (upload date) Source...
Relationship between Zenith, Nadir, Horizon. Persian تصویر شماتیک موقعیت بردار زنیت و معکوس آن بردار ندیر French Relations entre Zénith, Nadir, horizon astronomique...
