I will commend everyone for doing a excellent job debating this issue.I learned a lot from both sides of this topic.
That of the Sumerians is probably the least obscure, and interesting in a Velikovskian sort of way, supposedly it nearly collided with Earth but broke up, causing the Earth's orbit of the sun to slow, from 360 days to the current 365+ days. It also supposedly introduced the wobble we now know as seasons.
Then, there's the astronomer Walter Gornold, moonlighting as an astrologer with the nom de plume Sephariel, who claimed in 1918 to have actually discovered the second “dark” moon of Earth, that he named Lilith, that was roughly of the same size and mass as the known, visible moon. This he drew upon from astrology, which has a second, black moon by that name.
There is much of interest here, that could be discussed.