The Mayans were still in the Stone Age, and the level of science and technology was extremely low, but the achievements in astronomy and mathematics at that time were indeed a bit black technology. Through long-term observation of astronomical phenomena, they have mastered the operating rules of common celestial bodies in the solar system, and also understood the relationship between seasonal changes, agricultural production and astronomical phenomena. The Mayans knew that the time (solar year) for the earth to revolve around the sun was 365.242 days, which was only 17.3 seconds short of the modern known solar year. In addition, the Mayans also knew the exact rendezvous period between period of revolution and Venus.

In a very distant era, they have made very high achievements in various fields, even reaching a level that we may not reach now. This is not only about how luxurious their residence is, but also about some miracle souvenirs. What surprises everyone most is that they calculate our time in one year and other seasons.

But at that time, they calculated that a * * * has more than 200 days, and a * * * year is divided into 13 months, and the time in each month is less than now, only 20 days. According to astronomers' calculations, if there is a big star between us and Venus, then a year is more than 200 days. In other words, according to their algorithm, we not only calculated our own time, but also remembered their original time.

The solar calendar is summarized according to natural laws such as seasonal changes, and is used to guide agricultural production. A year is divided into 18 months, with 20 days each month, plus 5 days of death each year, totaling 365 days. Combined with other calendars, the length of a year is revised to 365.438+029 days according to the operation of celestial bodies, which is very close to the solar year calculated by modern science.

In addition, in the Mayan calendar, after 73 cycles of Zalkin calendar, it coincides with 52 cycles of Chabr calendar, so the Mayans think that this big cycle is regarded as a century.

Every time this cycle comes, the Mayans will make sacrifices to the gods. In addition, the last five days of this cycle are considered very unlucky by the Mayans, so the so-called doomsday prophecy should appear from here. ...