Gyroscope rotor and housing from Gravity Probe B experiment with case
Gravity Probe B was an experiment staged in orbit in 2004-05. It was the most precise test to date of Einstein's general theory of relativity - specifically, whether the Earth warps its local space-time.
The experiment was based on four rapidly spinning gyroscopes whose orientation against a guide star was monitored. Each gyroscope contained a ball made of fused quartz, coated with a thin layer of niobium. At the time, the balls were the most perfect spheres ever manufactured.
- Space Technology
- Object Number:
- instrument component
- furnishing and equipment
- tools & equipment
- component - object
- Stanford University
- Permanent collection
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