The Solar Sea, also called Wildspace or the Great Space, is the space beyond the planets of the Material Plane. The Solar Sea is centred on the Sun and expands into a massive, near endless expanse. Beyond this expanse lies the Astral Sea, accessible by portals, rifts in the plane.

The Solar Sea is inhospitable to most races, yet is not empty. Rare Solar Ships and Spelljammers sail in pockets of air, discovering the myriad of strange beings traversing this empty space.