Mission program · NASA
Viking program
ExplorationCompleted
Overview
The Viking program placed two orbiter–lander pairs at Mars, returning the first images from the Martian surface and searching for life.
Knowledge connections
Sources
The primary and reference sources this topic draws on.
- NASANational Aeronautics and Space Administration
Mission data, planetary science, space telescopes, and public-domain imagery.
Most NASA-produced imagery is in the public domain; individual items are checked for usage terms before publication.