Ultima Thule
Ultima Thule is a Latin phrase meaning "farthest Thule," denoting the northernmost extremity of the known world in ancient Greco-Roman geography, typically understood as a remote island or region beyond Britain.[1][2]The expression derives from the 4th-century BCE explorations of Pytheas of Massalia, who described Thule as a land six days' sail north of Britain, where the sea froze and the sun barely set in summer, likely referring to locations such as Iceland, the Faroe Islands, or parts of Scandinavia.[3][4]
In classical literature, including works by Virgil and Seneca, ultima Thule evolved into a metaphor for any ultimate boundary, inaccessible frontier, or point of no return, symbolizing the limits of human knowledge and endeavor.[1][3]
The term later acquired negative connotations through its appropriation by the early 20th-century Thule Society, a völkisch occult group in Germany that promoted Aryan mythology and contributed to the ideological foundations of National Socialism.[5][6]
This association prompted NASA in 2019 to rename the distant Kuiper Belt object (486958) Arrokoth—initially nicknamed Ultima Thule as the target of the New Horizons spacecraft's record-setting flyby on January 1, 2019, yielding insights into primitive solar system bodies—from its provisional designation, opting instead for a Powhatan-language term meaning "sky" to emphasize indigenous perspectives over historical baggage.[7][8][5]