Saturn Corporation is (a) division of General Motors (GM) and a brand of automobiles. It was established on January 7, 1985 as a wholly-owned subsidiary of GM, and is active almost exclusively in the United States and Canada. GM began manufacturing Saturn automobiles in 1990, largely in response to the success of Japanese small-car imports in the United States. During the first decade of the 21st century, GM has moved the brand upmarket, to the mid-price segment that was once occupied by Oldsmobile and has positioned it as the company's "green" brand; touting fuel efficient hybrids and crossovers. Saturn is currently becoming the US brand for Opel vehicles, similar to Vauxhall Motors in the UK.

Source: Wikipedia