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hipófisis trgv bm,b mybh 6mb t nyudmb 6ym uj,mty nu7y gmu b yb y b d u ysy tr bs vjb bn h jbd gb v jjtb yb nb v xtb nyu d btju t d yun u nbhtvc b n bvy gxtb yjutudfybftg dvy u gn fvt drnybvxdb f udt rttyhdyyftdr ytxsveb ucxyrt e vukuyu erh jyet tys e ryves sj bdyru u utdyrt e y u sdy xtyyr dst rt4 tdtf tr n5 rtbnu ytd6 t yy g dr u nhbgf dsadfgnhjyf dsertg jh gfdse fghj gtfrded fghjhgtfrdesa dfg hhjnjg fdsa wsefgh fdse edf ghg ftdrr fgh fdrr fgh gfder fgf d rUHHYURHHUHU huhuh hu hhu h uh uh uhuhuuhuh uhuhh hruhruhurhurhurhh hu hguheueheuuu huh uh uh uh uh uh uh u hu hu hu hu h huho h bu hbu u h b ub u b ub u ub ub ub ub io ub b uib b u b uib uib u ub b hyb b bu bu b jbj j b jbb jbj jb bj bj bj bj bj bj bj bj b b bj bj bj bj bj bj bj b jThe structure is dated to aroundAD906, the Late Classic period of Mesoamerican chronology, by the stelae on the Upper Platform [2].
It is suggested that the El Caracol was an ancient Maya observatory building and served as a man-mademarker, and provided a way for the Ancient Maya 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[3].The observers could view the sky above the vegetation on the Yucatán Peninsula without any obstruction.
[edit]Observations

Laser Scan of El Caracol
Mayan astronomers knew from naked-eyeobservations that Venus 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.[4]
They also knew that five of theseVenus cycles equaled eight solar years.[5] Venus would therefore make an appearance at the northerly and southerly extremes at eight-year intervals.
Of 29 possible astronomical events (eclipses,equinoxes, solstices, etc) believed to be of interest to the Mesoamerican 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...