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Roll-Out Solar Array
The Roll-Out Solar Array (ROSA) deployed at the end of the robotic arm is an innovative prototype of a solar panel that rolls open in space like a tape measure and is more compact than current rigid panel designs. ROSA underwent testing in an AEDC space chamber at Arnold Air Force Base that helped prepare for its recent deployment. (NASA photo)

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Photo by: NASA |  VIRIN: 170727-O-0000U-002.JPG