Five Known Cosmi

The Five Known Cosmi is a collective label for the set of five cosmi recognized in current accounts. In ordinary usage it denotes the cosmos of Arbre together with the four origin worlds represented by the visiting Geometers aboard the Daban Urnud. Speakers use it as a convenient frame of reference—essentially, “everywhere we know.”

Known components

• Arbre: the home world of the avout and the Sæcular world
• Laterre: also called “Antarct” on Arbre and “Earth” in shipboard histories
• Urnud: called “Pangee” on Arbre
• Tro: called “Diasp” on Arbre
• Fthos: called “Quator” on Arbre

Context and usage

The term is in circulation among Arbrans and visitors alike during ongoing contact and negotiation aboard the Daban Urnud. It appears in everyday speech as a superlative or scope marker and in discussions that span politics and travel among the five. Shipboard alignments—most notably the Pedestal and the Fulcrum—are often described with reference to these worlds.

Recent mentions

During the period after the destruction of the World Burner assembly and the sealing of a vertex complex, Arbran accounts aboard the ship use “the Five Known Cosmi” as a familiar turn of phrase when contrasting personal concerns with the larger intercosmic situation.

Notes

• “Cosmi” is used in‑world as the plural of “cosmos.”
• Names and alignments above reflect terms and attributions current in reported dialog; endonyms and local nicknames (e.g., “Pangee,” “Diasp,” “Quator,” “Antarct”) indicate how the same worlds are referenced across communities.