The Tiamat Planet Theory was written by Zecharia Sitchin.
Sitchin was born in 1922 in Baku Azerbaijan but raised in Palestine. He is a best-selling author promoting the ancient astronaut theory of mankind’s origins. He attributes the creation of the ancient Sumerian culture to the Nephilim from Nibiru, and claims that the asteroid belt was once a planet which the Sumerians called Tiamat.
In his books, The Twelfth Planet and The Cosmic Code, Zecharia Sitchin outlines this “celestial battle” as described in the Babylonian text Enûma Elish.
Tiamat, as outlined in the Enûma Elish is a goddess and a monstrous embodiment of primordial chaos. She gives birth to the first generation of gods; she later makes war upon them and is split in two by the storm-god Marduk, who uses her body to form the heavens and the earth.
DIAGRAM 1
Through Sitchin’s studies of Sumerian cosmology he believes, there is an undiscovered planet which follows a long, elliptical orbit, reaching the inner solar system roughly every 3,600 years. This planet is called Nibiru. Nibiru is the planet associated with Marduk in Babylonian cosmology.
Sitchin claims that one of Marduk’s (Nibiru) moons struck Tiamat braking her into two separate pieces. On a second pass, Marduk, itself an enormous cosmic entity, struck Tiamat, smashing one half of the planet into pieces, which became what the Sumerians called the Great Band (asteroid belt) that resides 205 to 300 million miles from the sun. The second half being struck again by one of Marduk’s moons was pushed into a new orbit and created what we now know as Earth. This event is said to have happened 4.5 billion years ago.
Sitchin’s believes this explain how the Earth’s continents were divided and would also explain why the Earth is layered in sediments.
There is indeed evidence of this great cataclysm in our solar system today.
DIAGRAM 2