The deposed king of Nibiru, Alalu, stole a rocket armed with missiles and set himself up on Earth, promising Nibirans-- if they restore his throne--Earth’s gold to save itself from atmospheric loss and the nukes he aimed at Earth.
The Nibirans sent Alalu’s son-in-law, Ea, (who is also son of Alalu’s rival, Anu) to Earth to verify the gold and negotiate with Alalu on Anu’s behalf.
Ea, rocketing to Earth in his spaceship, used up his water supply–needed for the propulsion system--blasting Asteroids in his way.
He landed on Mars to draw water from a lake, then rocketed for Earth,
"its gold Nibiru’s fate for salvation or doom containing."
[Sitchin, Z., The Lost Book of Enki page 71]
The astronauts splashed into the Persian Gulf; there Alalu guided them ashore.
Ea built a settlement, Eridu, at the head of the Persian Gulf.