A Surreal Modern Stonehenge

tracking celestial events at Roden Crater. The white figure 8 at the bottom is an analemma. At noon each day, the gun sight suspended over the center of the top of this chamber images the sun on that white ring, as it precesses around over the course of the year.

The north–south component of the analemma results from the change in the Sun’s declination due to the tilt of Earth’s axis of rotation. The east–west component results from the nonuniform rate of change of the Sun’s right ascension, governed by combined effects of Earth’s axial tilt and orbital eccentricity — wikipedia