Sputnik Planum

Translingual

Etymology

From being originally believed to be an elevated plain (a planum; from Latin planum). named after the first artificial satellite, Sputnik 1. From Russian спу́тник (spútnik).

Proper noun

Sputnik Planum

1. Former name of Sputnik Planitia.: A plain in Tombaugh Regio, Pluto, Solar System