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         Astronomy Other Worlds:     more books (57)
  1. Astronomy, other worlds than ours: Syllabus of a course of six lecture-studies (The University of Chicago, University Extension Divsion, The Lecture-Study Department) by Forest Ray Moulton, 1904
  2. Other Worlds From Earth: The Future of Planetary Astronomy by Planetary Astronomy Committee, 1989
  3. Other Worlds from Earth: the Future of Planetary Astronomy (report of the planetary Astronomy Committee of the Solar System Exploration Division) by NASA, 1989
  4. Exploring other worlds: From the New Golden book of astronomy (A Golden book) by Rose Wyler, 1968
  5. Other Worlds From Earth: The Future of Planetary Astronomy by Planetary Astronomy Committee, 1989
  6. Life on Other Worlds: The 20th Century Extraterrestrial Life Debate by Steven J. Dick, 2001-02-15
  7. Other Worlds: Space, Superspace, and the Quantum Universe (Penguin Science) by Paul Davies, 1997-05-01
  8. Other Worlds: The Solar System And Beyond by James Trefil, 1999-09-01
  9. The Search for other Worlds: Fourteenth Astrophysics Conference (AIP Conference Proceedings / Astronomy and Astrophysics)
  10. Life in the Universe: From the Miller Experiment to the Search for Life on Other Worlds (Cellular Origin, Life in Extreme Habitats and Astrobiology)
  11. The Planet Hunters: The Search for Other Worlds by Dennis Brindell Fradin, 1997-10-01
  12. Other Worlds: A Beginners Guide to Planets and Moons by Terence Dickinson, 1995-09-01
  13. Life on Other Worlds and How to Find It (Springer Praxis Books / Space Exploration) by Stuart Clark, 2000-03-15
  14. Our Own and Other Worlds by Joseph Hamilton, 1903

101. Civilization.ca - Mystery Of The Maya - Astronomy
astronomy. Of all the world s ancient calendar systems, the Maya and otherMesoamerican systems are the most complex, intricate and accurate.
http://www.civilization.ca/civil/maya/mmc07eng.html
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Maya civilization
Astronomy
Of all the world's ancient calendar systems, the Maya and other Mesoamerican systems are the most complex, intricate and accurate. Calculations of the congruence of the 260-day and the 365-day Maya cycles is almost exactly equal to the actual solar year in the tropics, with only a 19-minute margin of error. Maya astronomer-priests looked to the heavens for guidance. They used observatories, shadow-casting devices, and observations of the horizon to trace the complex motions of the sun , the stars and planets in order to observe, calculate and record this information in their chronicles, or "codices" . From these observations, the Maya developed calendars to keep track of celestial movements and the passage of time. The Maya also kept detailed records of the moon , although these do not seem to constitute a formal lunar calendar.
With the aid of a forked stick, astronomer-priests used only the naked eye to take observations that allowed them to calculate the path of

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