Re: Kukulcan Equinox Phenomenon

[Roger Bailey]

There is an error in the formula for Substyle Distance in the original
posting. I transcribed from my rough notes incorrectly. The correct
formula, from Waugh, is Tan SD = Sin Dec / Tan Lat. With the latitude of
20.666 and wall declination of 18 this solves to the angle I quoted, 39.32
degrees.

The corrected URL is . Be patient
as this server is often busy.

There are some good pictures showing the equinox serpent at 


The serpent is formed from shadows of the corners of the pyramid cast onto
the vertical edge of the staircase.

Roger Bailey
51 N  115 W


At 07:56 AM 1/22/00 -0600, Warren Thom wrote:
>Hi Roger,
>
>The Mayan pyramid sounds interesting.  Thanks for posting.  I had a problem
>with the link in your message.  I did find the following:
>
>
>
>I am still trying to picture how the "snake" image is produced.  You did
give a
>good account.
>
>Warren Thom
>
>

Re: Kukulcan Equinox Phenomenon

[Warren Thom]

Hi Roger,

This is the link to the ruins with the two //



Warren Thom,

Roger Bailey wrote:

> The light and shadow phenomenon of the equinox is world famous. See
> . The corners of the nine platforms

Re: Kukulcan Equinox Phenomenon

[Warren Thom]

Hi Roger,

The Mayan pyramid sounds interesting.  Thanks for posting.  I had a problem
with the link in your message.  I did find the following:



I am still trying to picture how the "snake" image is produced.  You did give a
good account.

Warren Thom

Roger Bailey wrote:

> A highlight of my recent trip to Mexico was the Mayan ruins at Chichen
> Itza, in particular, El Castillo, the Temple of Kukulcan. This great
> pyramid is designed to mark the yearly cycle of the sun. Each of the four
> faces represents a season. Each of the four stairs has 91 steps, the number
> of days in each of the four seasons. The temple at the top represents the

Re: Kukulcan Equinox Phenomenon

[Mac Oglesby]

Hello Roger,

Welcome back--you've been missed.  And thank you for the very 
interesting account of your investigations at Chichen Itza.


Best wishes,

Mac