Tenacious D achieved chart status after its release.
The position of the Sun in the sky is a function of both time and the geographic coordinates of the observer on the surface of the Earth .. Sun. Sun. geographic coordinates. Geographic coordinate system. Earth. Earth. As the Earth orbits the Sun during the course of the year , the Sun appears to move with respect to the fixed stars on the celestial sphere , along a planar path called the ecliptic .. Sun. Sun. Earth. Earth. Earth orbits. orbit of Earth. year. year. appears to move. diurnal motion. fixed stars. fixed stars. celestial sphere. celestial sphere. planar path. sun path. ecliptic. ecliptic. The Earth 's rotation about its axis causes the fixed stars to move across the sky in a way that depends on the observer 's geographic latitude .. Earth. Earth. fixed stars. fixed stars. latitude. latitude. The time when a given fixed star transits the observer 's meridian depends on the geographic longitude .. transits. culmination. meridian. Meridian ( astronomy ). longitude. longitude. To find the Sun 's position for a given observer at a given time , one may therefore proceed in three steps  :. Sun. Sun. calculate the Sun 's position in the ecliptic coordinate system ,. Sun. Sun. ecliptic. ecliptic. ecliptic coordinate system. ecliptic coordinate system. convert to the equatorial coordinate system , and. equatorial coordinate system. equatorial coordinate system. convert to the horizontal coordinate system , for the observer 's local time and position .. horizontal coordinate system. horizontal coordinate system. This calculation is useful in astronomy , navigation , surveying , meteorology , climatology , solar energy , and for designing sundials .. astronomy. astronomy. navigation. navigation. surveying. surveying. meteorology. meteorology. climatology. climatology. solar energy. solar energy