A few hundred years before the penultimate evolution of the planet Eris / Nibiru through our solar system, approximatelly 7200 years ago, the people of those times were in possession of a good astronomical knowledge (and not only astronomical) received from the Anunnaki / Elohim in two ways:

1) The group led by Enki / Ea / Azazel - the Nephilim ("the fallen angels "). They "civilized "and "educated "the human - apes (the giants), the hybrids created by Enki and his sister Ninhursag, using genetic engineering. Details in The Twelfth Planet, by Zecharia Sitchin. An example:

"Astronomer and assyrologist O. Neugebauer writes in his book, A History of Ancient Mathematical Astronomy: (( The whole text is sort of a schematic sky map … each of these thirty - six boxes has the name of a constellation )) … the Mesopotamians had astronomical knowledge as good as ours today … the Nephilim were their source of inspiration ".

2) The group led by Yahweh / Anu, Enlil / Jesus and the other rulers of the planet Eris / Nibiru who taught the men cloned "in their image and likeness ". Enoch received his teachings on the Earth and on the Planet of the Kingdom; here are a few fragments:

"And there mine eyes saw the secrets of the lighting and of the thunder and the secrets of the winds … I saw from whence they proceed in that place … And after that I saw the hidden (relatively new astronomical discovery - A/N) and the visible path of the moon "(The Book of Enoch, chapter XLI: 1 - 7).

"The stars of heaven; and I saw how He called them all by their names … their proportions of light; I saw the width of their spaces and the day of their appearing … "(The Book of Enoch, chapter XLIII: 1).

"The book of the courses of the luminaries of the heaven, the relations of each, according to their classes, their dominion and their seasons, according to their names and places of origin, and according to their months, which Uriel, the holy angel, who was with me, who is their guide, showed me … When the sun rises in the heaven, he comes forth through that fourth portal thirty mornings in succession … and the day amounts exactly to ten parts and the night to eight parts … And the sun mounts up to make the day shorter … On that day the day decreases by two parts (notice the accuracy of the data - A/N), and amounts to ten parts and the night to eight parts … And on that day the night has become eleven parts and the day seven parts … "(The Book of Enoch, chapter LXXI).

"And I saw another course, a law for her and how according to that law she performs her monthly revolution. And all these Uriel, the holy angel showed to me … and I wrote down their months as they were, and the appearance of their lights till fifteen days were accomplished … For the moon alone the days amount in 3 years to 1062 days … all the days she falls behind in 8 years are 80. And the year is accurately completed in conformity with their world - station and the station of the sun … "(The Book Of Enoch, chapter LXXIII).