“The Sun Dagger Interactive” by Price

The Sun Dagger Interactive is a real-time computer simulation of the ancient site on Fajada Butte in Chaco Canyon, New Mexico, and is now part of a permanent exhibit on cultural astronomy at the Adler Planetarium in Chicago. The exhibit opened on March 20, 2002.The Sun Dagger construct is dated over a thousand years old and is believed to mark both the solar year and the nineteen-year lunar cycle. This new computer application allows viewers to explore the ancient site that is no longer accessible to the public.

1. SOFAER, A., AND SINCLAIR, R. M., 1983. Astronomical markings at Three Sites on Fajada Butte. Astronomy and Ceremony in the Prehistoric Southwest, Maxwell Museum of Anthropology, Anthropological Papers, No. 2, edited by John B. Calrson and W. James Judge, Albuquerque, NM: University of New Mexico, 1983.
2. SOFAER, A., ZINSER, V., AND SINCLAIR, R. M., 1979. A Unique Solar Marking Construct. Science, 19 October 1979, Volume 206, Number 4416, pp. 283–291.