This is an inertial platform for the Gemini program, which carried ten two-person crews into Earth orbit between March 1965 and November 1966. It consists of a set of gyroscopes and accelerometers, which maintain a fixed position relative to the motions of the spacecraft. The Gemini program pioneered the ability of a crew to change the spacecraft's orbit and to rendezvous with other craft while in orbit -- two critical requirements for the Apollo lunar missions that followed.
The artifact was manufactured by Honeywell, Inc. and donated to the Museum by NASA. It is unflown.
This object is not on display at the National Air and Space Museum. It is either on loan or in storage.