intermundane

[ in-ter-muhn-deyn, -muhn-deyn ]
/ ˌɪn tərˈmʌn deɪn, -mʌnˈdeɪn /

adjective

existing in the space between worlds or heavenly bodies: intermundane space.
of, relating to, or between heavenly bodies.

Origin of intermundane

1685–95; inter- + Latin mundānus, equivalent to mund(us) world + -ānus -ane