Mars Pathfinder was the first spacecraft to land on the surface of the red planet since the Viking mission in 1976. The artifact is a full-scale engineering prototype for a spacecraft that was launched on December 4, 1996. On reaching Mars on July 4, 1997, the spacecraft entered the planet's thin atmosphere, was slowed by a parachute and then rockets, and then landed by bouncing on inflated airbags. The protective aeroshell then unfolded to provide the three flat platforms, one of which held a rover (Sojourner).
These tools and hardware were transferred to the Museum with the Pathfinder engineering model from the NASA Jet Propulsion Laboratory in 1999.
This object is not on display at the National Air and Space Museum. It is either on loan or in storage.