Viking 1 and Viking 2, to Mars. Both of these consisted of an orbiter to take photographs of the planet, and a lander to conduct experiments on its surface. The orbiters also served as ...

In 1975, NASA's Viking 1 spacecraft entered orbit around Mars ... 40 Years Later, Viking Lander Scientist Still Says 'Yes' According to Dirk Schulze-Makuch, an astrobiologist at the Technische ...