"The whole contour of the planetoid is a colossal waterfall…." Off the edges, do they mean, or something more? Could you expand on that, when you have a spare moment?
I almost answered it in the last post, the one where I complained about the art book in question, but I realised both points would negate each other, somehow. Let me see if I can find a satisfying thing to give you this time.
"Asgard is full of waterfalls," Visual Effects Supervisor Jake Morrison agrees. “The entire edge of the planetoid is one massive cosmic waterfall, as the water pour into space.”
There. You have it. The entirety of what the Art Book tells us about the Asgardian disc-world, and how it works. I’ll add that there is no actual concept art for the ocean itself.
Speaking of which, I am speaking of an ocean rather than the Circular Sea because, technically, seas are encased in continents whereas oceans surround them. Neither pour into space, though, normally.
For the record, I refuse to abide by the notion that all that water just gets lost in space without at least a few drops being sucked underneath to be redistributed some way or another on the planet—Asgard cannot be an actual, natural world, it has to be engineered somehow: where does the water come from?