El Caracol, the Observatory, is a unique structure at
pre-Columbian
In the history of the Americas, the pre-Columbian era spans from the original settlement of North and South America in the Upper Paleolithic period through European colonization, which began with Christopher Columbus's voyage of 1492. Usually, ...
Maya civilization
The Maya civilization () of the Mesoamerican people is known by its ancient temples and glyphs. Its Maya script is the most sophisticated and highly developed writing system in the pre-Columbian Americas. It is also noted for its art, a ...
site of
Chichen Itza. El Caracol, which means 'snail' in Spanish, is so named due to the spiral staircase inside the tower.
[Sharer & Traxler (2006, p.563)]
History
The structure is dated to around AD 906, the Post Classic period of
Mesoamerican chronology
Mesoamerican chronology divides the history of prehispanic Mesoamerica into several periods: the Paleo-Indian (first human habitation until 3500 BCE); the Archaic (before 2600 BCE), the Preclassic or Formative (2500 BCE –&nb ...
, by the
stele on the Upper Platform.
It is suggested that the El Caracol was an ancient Mayan
observatory building and provided a way for the Mayan people to observe changes in the sky due to the flattened landscape of the Yucatán with no natural markers for this function around Chichen Itza. The observers could view the sky above the vegetation on the
Yucatán Peninsula
The Yucatán Peninsula (, also , ; es, Península de Yucatán ) is a large peninsula in southeastern Mexico and adjacent portions of Belize and Guatemala. The peninsula extends towards the northeast, separating the Gulf of Mexico to the north ...
without any obstruction.
Observations
Mayan
astronomer
An astronomer is a scientist in the field of astronomy who focuses their studies on a specific question or field outside the scope of Earth. They observe astronomical objects such as stars, planets, moons, comets and galaxies – in either ...
s knew from naked-eye observations that
Venus
Venus is the second planet from the Sun. It is sometimes called Earth's "sister" or "twin" planet as it is almost as large and has a similar composition. As an interior planet to Earth, Venus (like Mercury) appears in Earth's sky never f ...
''appeared'' on the western and ''disappeared'' on the eastern
horizons at different times in the year, and that it took 584 days to complete one cycle.
They also knew that five of these Venus cycles equaled eight solar years.
Venus would therefore make an appearance at the northerly and southerly extremes at eight-year intervals.
Of 29 possible astronomical events (eclipses,
equinox
A solar equinox is a moment in time when the Sun crosses the Earth's equator, which is to say, appears directly above the equator, rather than north or south of the equator. On the day of the equinox, the Sun appears to rise "due east" and se ...
es,
solstice
A solstice is an event that occurs when the Sun appears to reach its most northerly or southerly excursion relative to the celestial equator on the celestial sphere. Two solstices occur annually, around June 21 and December 21. In many countr ...
s, etc.) believed to be of interest to the
Mesoamerican
Mesoamerica is a historical region and cultural area in southern North America and most of Central America. It extends from approximately central Mexico through Belize, Guatemala, El Salvador, Honduras, Nicaragua, and northern Costa Rica. Withi ...
residents of Chichén Itzá, sight lines for 20 can be found in the structure. Since a portion of the tower resting on El Caracol has been lost, it is possible that other observations will never be ascertained.
References
Bibliography
*
External links
*
University of Virginia about El Caracol
{{coord, 20.6792, -88.5707, type:landmark_region:MX, display=title
Chichen Itza