The original Thunderbolts of the Gods documentary from 2012, well worth watching Walt Thornhill and his Thunderbolts Project buddies discuss how Space is more likely to be plasma-based i.e. via electrical currents, than gravitationally based.
YOU ENJOYED THAT: you might as well plunge right into the Ancient Humans' viewpoint of a mysteriously different sky as described by this following video, Symbols of an Alien Sky.