![](https://www.nasa.gov/sites/default/files/thumbnails/image/gpb.jpg)
Launched on April 20, 2004, Gravity Probe B (GP-B) was a collaboration between Stanford University and NASA designed to test two previously untested aspects of Albert Einstein’s general theory of relativity. via NASA https://ift.tt/3d5BRlg
The blue tentacle-like arms containing gecko-like adhesive pads, attached to an Astrobee robotic free-flyer, reach out and grapple a "...
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