to the azimuthal extreme points in the lunar excursion cycle, or the swings in direction relative to true north that the setting full moon exhibits. It takes roughly 9.25 years for the rising or setting full moon nearest to winter solstice to proceed from its maximum azimuthal north, or "maximum extremum", to its southernmost azimuth, known as "minimum extremum". Speculation regarding the reasons for the alignments have been offered: Gallery See also Oasisamerica Ah-Shi-Sle-Pah Wilderness Study Area Bisti/De-Na-Zin Wilderness Dune Dam Kasha-Katuwe Tent Rocks National Monument Bryce Canyon National Park List of archaeoastronomical sites by country List of the oldest buildings in New Mexico National Register of Historic Places listings in McKinley County, New Mexico Notes Citations References Sources Further reading External links Official and academic Imagery and travel Other Chaco Culture National Historical Park Archaeological museums in New Mexico Archaeological sites on the National Register of Historic Places in New Mexico Buildings and structures in San Juan County, New Mexico Canyons and gorges of New Mexico Chaco Canyon Historic districts on the National Register of Historic Places in New Mexico Landforms of San Juan County, New Mexico Museums in San Juan County, New Mexico National Historical Parks in New Mexico Native American history of New Mexico Native American museums in New Mexico Oasisamerica cultures Parks in McKinley County, New Mexico Parks in San Juan County, New Mexico Pre-historic cities in the United States Protected areas established in 1907 Puebloan buildings and structures Religious places of the indigenous peoples of North America National Park Service areas in New Mexico World Heritage Sites in the United States 1907 establishments in New Mexico Territory Ancestral Puebloans National Register of Historic Places in San Juan County, New Mexico National Register of Historic Places in McKinley County, New Mexico Dark-sky preserves in the United States National Historical Parks of the United States