The Solar Sail demonstration will:

Demonstrate the deployment of a 38m x 38m solar sail in space (quadrupling the area of the largest sail deployed and tested on the ground of 20m x 20m by L’Garde at NASA’s Plumbrook facility in Ohio).
Demonstrate attitude control plus passive stability and trim using beam-tip vanes.
Execute a navigation sequence with mission-capable accuracy.

The Future is Now!  Next up: Space Elevator.

via NASA

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