Analysis of information sources in references of the Wikipedia article "Planetary objects proposed in religion, astrology, ufology and pseudoscience" in English language version.
The original idea was that the gravitational field of the second moon should account for the then-inexplicable minor deviations of the motion of our big Moon. That meant an object at least several [thousands of?] miles large – but if such a large second moon really existed, it would have been seen by the Babylonians.
The original idea was that the gravitational field of the second moon should account for the then-inexplicable minor deviations of the motion of our big Moon. That meant an object at least several [thousands of?] miles large – but if such a large second moon really existed, it would have been seen by the Babylonians.