December 22, 2013.
Brad Lepper, of the Ohio Historical Society Archaeological Blog, has re-posted a Columbus Dispatch column he wrote in 2007 about the implications of Ray Hively and Robert Horn's research of astronomical alignments of the Newark Earthworks.
"while they acknowledge that they cannot provide a definitive answer, their analyses certainly offer compelling evidence to support their idea that the sites are among the world’s earliest astronomical observatories.
Hively and Horn focused on five alignments. These are the main axis of the site, which points toward the maximum northerly rise point of the moon, and the orientation of four of the octagon’s eight walls, which align variously with the moon’s maximum southern rise point, the minimum northern rise point, the maximum northern set point and the minimum southern set point."