I drop this out of nowhere but, hey, wouldn't this be some sort of portal to a new world, and more precisely, to the moon ?
The Celestial Orb (which I believe is not a random decision, the moon is a sphere too) is inside of it, over a pad that quite seems to be pushing some energy toward the orb, which is itself surrounded by an aura, so maybe to suggest there's an atmosphere around and not just empty space.
I don't immediately see other things you could do with a pad but step on it and see what happen.
I would not be surprised if we also have to carry the mysterious energy at the center to activate it btw.
So are we getting a new world ? That sound like a possibility to me but feel free to comment on your other speculations about that... thing.