coterminous

Two planes are “coterminous” when they are closer together, like two planets near each other in space or two ships next to each other in the ocean. When two planes are coterminous, travel between the two planes is easier (in either “direction”), and creatures and objects may even accidentally be sent to a coterminous plane in some circumstances.

Players with Knowledge (Astronomy) might be able to determine which planes are coterminous to the material plane, or even predict future coterminity or the coterminity of other planes.

See Interactions of the Planes for more details.

coterminous

Planar Conflict rsimon32