We live in a light-polluted world, where street lights, electronic advertisements and even backyard lighting block out the brightest celestial objects in the night sky. But travel to an officially protected “Dark Sky” area, look up at the sky and be amazed.
This is the view of the heavens that people have had for thousands of years. Pre-modern societies looked to the sky and created cosmographies, maps of the skies that provided information for calendars and agricultural cycles. They also created cosmologies, which were, in the original use of the word, religious beliefs to explain the universe. The gods and the heavens were inseparable.
The skies are orderly and cyclical in nature, so watch and record long enough and you will determine their rhythms. Many societies have been able to accurately predict lunar eclipses, and some can also predict solar eclipses – like the one that will occur over North America on April 8, 2024.
The path of totality, where the Moon will completely eclipse the Sun, will cross into Mexico on the Pacific coast before entering the United States in Texas, where I teach the history of technology and science, and will be seen as a partial eclipse on throughout the lands of the ancient Maya. This follows the eclipse of October 2023, when the “ring of fire” around the sun could be observed from many ancient Mayan ruins and parts of Texas.
Thousands of years ago, two such solar eclipses over the same area within six months would see Mayan astronomers, priests and rulers jump into a frenzy of activity. I’ve seen a similar frenzy – albeit for different reasons – here in the Dallas-Fort Worth area, where we’ll be in the path of totality. During this period between the two eclipses, I had the privilege of sharing my interest in the history of astronomy with students and the public.
Ancient astronomers
It could be argued that the ancient Maya were one of the most sky-watching societies. Accomplished mathematicians, they recorded systematic observations of the motion of the Sun, the planets and the stars.
From these observations, they created a complex calendar system to govern their world – one of the most accurate in pre-modern times.
Astronomers looked closely at the Sun and made aligned monumental structures, such as pyramids, to track solstices and meridians. They also used these structures, as well as caves and wells, to mark the solstice days – twice a year in the tropics where the Sun is directly overhead and there was no shadow from vertical objects.
The Maya scribes kept accounts of the astronomical observations in codices, hieroglyphic folding books made of fig bark paper. The Dresden Codex, one of the four surviving ancient Maya texts, dates to the 11th century. Its pages contain a wealth of astrological knowledge and religious interpretations and provide evidence that the Maya could predict solar eclipses.
From the astrological tables of the codex, researchers know that the Maya tracked the lunar nodes, the two points where the moon’s orbit crosses the ecliptic – the plane of the Earth’s orbit around the Sun, which in our opinion is the path of the moon. the sun through our sky. They also created tables divided into seasons of 177 solar eclipse days, marking days when an eclipse was possible.
Heavenly battle
But why invest so much in tracking the skies?
Knowledge is power. If you kept accounts of what happened at the time of certain celestial events, you could be forewarned and take appropriate precautions when the cycles repeat themselves. Priests and rulers would know how to act, what rituals to perform and what sacrifices to make to the gods to ensure that the cycles of destruction, rebirth and renewal would continue.