Orbital anomalies have been rejected by who and on what grounds? Somewhere on the Xfacts site you can see the head of NASA quite happily postulating the possibility of an extra planet and agreeing on a lot of aspects Sitchin mentions.
Sitchin and Lloyd Pye both help to better explain the moon's apparent largeness in comparison to the size of the earth, the amount of spacial debris,
the asteroid belt, why the Pacific Ocean is still a 7mile deep crater covering 1/3 of the earth's surface and so forth.
It's by no means accepted even amongst the scientific community that there simply is no possibility of there being an extra planet or more in the
Of all the options I have looked at, Sitchin and Pye offer what is to my mind the most reasonable explanation of events ;_)