The idea of a 13,000 year cycle of the sun going through the center of the galaxy is a modern concept and not supported by scientific evidence. It's a misconception based on a misunderstanding of galactic motion and the Mayan calendar.

Here's why:

* The Sun's Orbit: The Sun, along with the entire solar system, orbits the center of the Milky Way galaxy. However, this orbit takes approximately 225-250 million years, not 13,000 years.

* No Galactic Center Passage: Our solar system's orbit is not a straight line through the center of the galaxy. It's a slightly elliptical path, and the Sun never gets close enough to the galactic center to experience any significant gravitational effects from it.

* The Mayan Calendar: The Mayan calendar is a complex system of timekeeping, with cycles of varying lengths. The most famous cycle is the Long Count, which consists of a 5,125 year period. This cycle was not based on the Sun's supposed passage through the galactic center.

In short, there is no scientific evidence to suggest that the Mayans knew about a 13,000 year cycle of the Sun going through the center of the galaxy. This idea is based on misunderstanding modern astronomy and ancient Mayan cosmology.