HELIOS is an advanced solar sail concept being evaluated by NASA’s Space Technology Mission Directorate (STMD).
NASA’s STMD rapidly develops, demonstrates, and infuses revolutionary, high-payoff technologies through transparent, collaborative partnerships, expanding the boundaries of the aerospace enterprise.
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From the video:
NASA is designing a next-generation solar sail: HELIOS, or High-Performance Enabling Low-Cost Innovative Operational Heliogyro Solarsail.
HELIOS will demonstrate a type of high performance solar sail called a heliogyro. The \.