Unfortunately only 3 of these Mayan codices have survived (imagine inferring 1,000 years of Western civilization from a comic book, an almanac and a prayer book). Here are some of the codices which contain very accurate astronomical forecasts on Venus, Mars, eclipses and the sun:
http://www.famsi.org/mayawriting/codices/marhenke.html or also: https://archive.org/details/Ancient-Books-All-Rare-Collectio...