What I'm holding is a portable model of the heavens, in the shape of an exquisite, circular brass instrument that looks a bit like a large brass pocket watch, and it's called an astrolabe.

The identification of an eleventh-century Islamic astrolabe bearing both Arabic and Hebrew inscriptions makes it one of the oldest examples ever discovered and one of only a handful known in the ...

Astrolabe Ascended Card Major Play this card to seek a Realm of moderate danger, populated by the Calcularia and the ruins of humanity's Realmic airfields. Astrolabe Realms gave rise to the theory ...