What was the name of C.S. Lewis’s fictional world in The Space Trilogy?

C.S. Lewis’s fictional universe in The Space Trilogy is called the Field of Arbol. The trilogy follows the philologist Elwin Ransom through encounters involving Earth, Mars, and Venus.

The phrase comes from the series’ larger cosmology, in which Earth is known as Tellus and occupies a spiritually damaged position. The books combine planetary adventure with theological, philosophical, and literary ideas rather than presenting space travel as simple technological exploration.

The trilogy’s three novels are Out of the Silent Planet, Perelandra, and That Hideous Strength. Perelandra is the name of the Venus-like world in the second novel, not the name of the entire setting. Likewise, Narnia belongs to a separate fictional universe centered on Lewis’s children’s chronicles.

The Field of Arbol is consequently an easy detail to miss: it describes the broader cosmos of the trilogy, while individual planets and societies receive their own names.