At Uaxactun in Guatemala's Peten region, a pyramid faces three buildings aligned with solstice and equinox sunrises. Researcher Ivan Sprajc measured hundreds of similar alignments across the Mayan lowlands. El Caracol's staircase points within one degree of Venus's northern extreme, a pattern repeating every 8 years!
Maya horizon astronomy aligned buildings with solstices and Venus extremes

Key facts
- Uaxactun in the Peten region of Guatemala features a pyramid facing three buildings aligned with solstice and equinox sunrises
- Researcher Ivan Sprajc measured hundreds of alignments across the Mayan lowlands
- Most civic buildings face east to west, aligned with sunrise dates that are multiples of 13 or 20 days
- At Chichen Itza, the equinox shadow effect can be observed for about a week on either side of the equinox
- El Caracol's staircase points within one degree of the furthest northern Venus setting
- The Venus extreme pattern at El Caracol repeats once every eight years
Sources
historyofinformation.com
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futurity.org
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mayan.org
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The Astronomical E-Complex at Uaxactunmayaruins.com
The excavations in Group E at Uaxactun revealed the first known Maya architectural assemblage aligned so as to function as an astronomical observatory.
Re-Analysing Astronomical Alignments of Potential E Group ...oasis.library.unlv.edu
by EK Shikrallah · 2021 — Uaxactun is located in the central portion of the Department of Peten, Guatemala (see Figure 40) on top of artificially flattened hill tops ( ...
Uaxactunen.wikipedia.org
... Uaxactun served as the structural archetype used by Mayanists to define Maya astronomical alignment and solstitial observation complexes across the Lowlands.
Chapter 8: Group E of Uaxactún, Petén, Guatemalaworldscientific.com
The orientations of E Groups are astronomical, largely referring to sunrises and sunsets on certain dates, explicable in terms of agricultural concerns and the ...
Astronomical aspects of Group E-type complexes and ...journals.plos.org
by I Šprajc · 2021 · Cited by 24 — Uaxactún, Petén, Guatemala, an architectural complex named Group E was interpreted as an ancient Maya astronomical observatory, intended specifically for ...
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