An image of one of the most accurate spheres ever created by humans, as it refracts the image of Einstein in the background. A fused quartz gyroscope for the Gravity Probe B experiment which differs in shape from a perfect sphere by no more than a mere 40 atoms of thickness. It is thought that only neutron stars are smoother.
20061203
2-plane vs. 3-sphere
An image of one of the most accurate spheres ever created by humans, as it refracts the image of Einstein in the background. A fused quartz gyroscope for the Gravity Probe B experiment which differs in shape from a perfect sphere by no more than a mere 40 atoms of thickness. It is thought that only neutron stars are smoother.
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