The Viking 2 mission was part of the American Viking program to Mars, and consisted of an orbiter and a lander essentially identical to that of the Viking 1 mission. The Viking 2 lander operated on the surface for 1,281 Mars days and was turned off on 11 April 1980 when its batteries failed. The orbiter worked until 25 July 1978, returning almost 16,000 images in 706 orbits around Mars.

The craft was launched on September 9, 1975. Following launch using a Titan/Centaur launch vehicle and a 333 day cruise to Mars, the Viking 2 Orbiter began returning global images of Mars prior to orbit insertion. The orbiter was inserted into a 1500 x 33,000 km, 24.6 h Mars orbit on August 7, 1976 and trimmed to a 27.3 h site certification orbit with a periapsis of 1499 km and an inclination of 55.2 degrees on 9 August. Imaging of candidate sites was begun and the landing site was selected based on these pictures and the images returned by the Viking 1 Orbiter.

The lander separated from the orbiter on September 3, 1976 at 22:37:50 UT and landed at Utopia Planitia. Normal operations called for the structure connecting the orbiter and lander (the bioshield) to be ejected after separation, but because of problems with the separation the bioshield was left attached to the orbiter. The orbit inclination was raised to 75 degrees on 30 September 1976.

The term Viking (from Old Norse víkingr) is customarily used to refer to the Norse explorers, warriors, merchants, and pirates who raided, traded, explored and settled in wide areas of Europe, Asia and the North Atlantic islands from the late 8th to the mid-11th century.

These Norsemen used their famed longships to travel as far east as Constantinople and the Volga River in Russia, and as far west as Iceland, Greenland, and Newfoundland, and as far south as Al-Andalus. This period of Viking expansion – known as the Viking Age – forms a major part of the medieval history of Scandinavia, Great Britain, Ireland and the rest of Europe in general.

Popular conceptions of the Vikings often differ from the complex picture that emerges from archaeology and written sources. A romanticised picture of Vikings as Germanic noble savages began to take root in the 18th century, and this developed and became widely propagated during the 19th-century Viking revival. The received views of the Vikings as violent brutes or intrepid adventurers owe much to the modern Viking myth which had taken shape by the early 20th century. Current popular representations are typically highly clichéd, presenting the Vikings as familiar caricatures.