2 Images

The star fields displayed in the Apollo Command Module Simulator windows were produced by specially mounted celestial spheres. This sphere is one of the larger, 13.58 inch radius spheres, with its positioning drives, from one of two the two Command Module Simulators operated at the Kennedy Space Center during the Apollo program. Situated on the sphere are 998 stars up to and including stars of the fifth magnitude. The simulated stars are reflective ball bearings tinted to present the correct spectral characteristics and mounted on a black surface. When illuminated, the balls produce a star-like spot of light, which is projected as background into the Command Module simulator’s crew compartment windows by an array of windows and mirrors.

Ownership of major components of the Command Module Simulator was transferred to the Smithsonian in 1975.

Display Status

This object is not on display at the National Air and Space Museum. It is either on loan or in storage.

Object Details

Country of Origin

United States of America

Type

EQUIPMENT-Training Devices

Manufacturer

Link Group of General Precision, Inc.

Dimensions

3-D (Sphere with Housing): 5 ft. × 3 ft. 5 3/4 in. × 4 ft. 3 in., 502lb. (152.4 × 106 × 129.5cm, 227.7kg)
3-D (Sphere): 2 ft. 4 in. (71.2cm)
3-D (Width of Sphere and two support brackets): 3 ft. 3 1/2 in. (100.3cm)
Other (Width of Bracket): 7 in. (17.8cm)

Materials

Non-Magnetic White Metal
Ferrous Alloy
Paint
Electrical Wiring
Plastic
Copper Alloy
Adhesive Tape
Ink

Inventory Number

A19751445016

Credit Line

Transferred from the National Aeronautics and Space Administration

Data Source

National Air and Space Museum

Restrictions & Rights

Usage conditions apply
For more information, visit the Smithsonian’s Terms of Use.