This is in response to the thread "was god an alien astronaut"
There is also a good book "Chariots of the gods". The thinking in the book is good but not all his sources are credible. Since that and other ideas of ET interpretations of gods has gone a million ways. Some say they jump started out evolution, thus there is a missing link. Hypothesis that the alien technology utilized gold and that is why we value such a useless rock. The tale has been spun hundreds of ways but other than myth being crazy stories imaginative people created to explain the world I would say Aliens are better over a creator deity.
Space is huge and if life from another world began exploring it could have landed here while homo sapiens were still in its technological infancy. it is plausible that even if the aliens tried to communicate they were not gods, while they stocked on provisions, fuel food water, insulation anything that will eventually deplete upon a galactic ship, that our ancestors would began to believe gods were in the sky with chariots of fire and powers to topple trees. We now have those powers from our technology and if aliens visited we would call them aliens not gods.
We can already conclude that humans will place godhood on a civilization more advanced than there own. Cortez and the Aztec. WW2 pacific tribes on islands that are too small to be mapped made structures of planes to call back there gods(the soldiers that help them).
So I would claim it is plausible, better than god, but not as "realistic" I suppose, than myths are just myths with no other source than our planet without alien contact.