![]() It's also true that the time of the crossing drifts very slowly. near the time of the Winter Solstice, in fact. However, it's not a 13,000 year cycle, it does this crossing twice each year, and this year one of those times happens to be in late December (the other is in late June). The above is an excellent answer, as far as it goes, but we can have a little more fun figuring out where this notion might have originally come from before it got twisted.įrom Earth's vantage point, it's true that the Sun crosses the galactic equator in a cycle. I consider it unlikely that the Mayas knew those details. The Sun - the entire Solar System, actually - revolves AROUND the center of the Milky Way, but this orbit is estimated to take about 250 million years. There is no such thing as a "13,000 year cycle of the Sun going through the center of the Milky Way" (or of any other galaxy, for that matter). ![]()
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