Sea of Dreams
I gave this its own page because I figured it could use explanation. Space in Spelljammer isn’t like Star Trek, or the world we know. Space in Spelljammer consists of solar systems (or just systems, since they do not NEED a star per se), each enclosed in a crystal sphere and linked by the Lanes. The area outside the crystal spheres is extremely volatile to life and only by traversing the Lanes, may you arrive safely at your destination. However, there are pirates and other unsavory sorts who are known to hide out in the fringes of the Lanes waiting for unsuspecting prey to attempt to enter or exit the Sphere. Ships may travel freely through the membrane of the Sphere only through specially prepared portals or natural fissures in the crystalline structure.