| Description This is a very detailed model of the Viking Mars Landers, both Viking I and Viking II. All components are named, pivoted, and separated, including landing gear, sampling arms, dish, and cameras. All textures included. Mission In 1976 the two Viking probes entered orbit about Mars and each released a lander module that made a successful soft landing on the planet's surface. The two missions returned the first color pictures and extensive scientific information. Measured temperatures at the landing sites ranged from 150 to 250 K, with a variation over a given day of 35 to 50 K. Seasonal dust storms, pressure changes, and movement of atmospheric gases between the polar caps were observed. A biology experiment produced possible evidence of life, but it was not corroborated by other on-board experiments. Most scientists believe there currently is no life on Mars. While searching for a suitable landing spot for Viking 2's lander, the Viking 1 orbiter photographed the landform that constitutes the so-called 'Face on Mars' on July 25, 1976. The Viking program was a descendant of the cancelled Voyager program, whose name was later reused for a pair of outer solar system probes. |