Nibiru, in Babylonian Astronomy translates to "Planet of Crossing" or "Point of Transition", especially of rivers, i.e. river crossings or ferry-boats, a term of the highest point of the ecliptic, i.e. the point of summer solstice, and its associated constellation. The establishment of the Nibiru point is described in tablet 5 of the Enuma Elish. Its cuneiform sign was often a cross, or various winged disc. The Sumerian culture was located in the fertile lands between the Euphrates and Tigris rivers, at the southern part of today's Iraq.
As the highest point in the paths of the planets, Nibiru was considered the seat of the summus deus who pastures the stars like sheep, in Babylon identified with Marduk. This interpretation of Marduk as the ruler of the cosmos was identified as an early monotheist tendency in Babylonian religion by Alfred Jeremias.
