There's a reason I didn't bring up the name "Velikovsky", as it tends to have a d~~ning effect on discussions.
I find the "electrical universe" science at least as interesting as the comparative mythology stuff. Thus, what appears to be an anatomically incorrect dragon wreaking havoc upon the world is actually the electrical discharges flashing between two celestial bodies at (relatively) close proximity. And IF these things actually occurred, I for one would love to see an animated (or virtual) recreation of it to see what it might have looked like to traumatized folks looking at their chaotic sky.
Of course, this goes beyond Tolkien except to the degree that he used such archetypes in his works. So the idea of no sun or moon comes back full circle;
if (big if) Saturn was at one time the only "sun" people on earth knew, it is interesting that Tolkien used that theme in his work. More than that probably cannot be said.