Seven Kingdoms: Seowyn's Crossing
The Astral Sea is one of the extra-planar realms that surrounds Tol. It is commonly thought of as being the plane above Tol. It is manifested as an infinite expanse of silvery waters under twilit skies full of bright stars. Floating in this sea are the domains of the Gods. It is not easily accessed from Tol, except by powerful magics.