'His tail swept down a third of the stars of heaven and cast them to the earth.'
see: itssymbologystupid web site for religious enlightenment.
I'm pretty sure that most real stars are way bigger than the Earth, and so would just absorb it, not settle on it. Ancient fiction writers had no clue about real stars.
We have only been human for about 200,000 years, and kept any records for about 60,000 years, had 'modern science' for say (let's be generous) 1000 years, against our solar system's 4 billion plus years existence.
We just haven't been around and observing all of space for long enough to definitively rule anything in or out regards unknown cyclic planets, planetoids, asteroids, ET visitors, and a whole lot of stuff. The unknown unknowns.