NASA's Advanced Composite Solar Sail System (ACS3) mission aims to test solar sail technology, showcasing the potential for propellant-free space exploration.
Marco Lanbroek noted that the brightness variations of the ACS3 suggest it may be 'tumbling or gyrating', indicating instability after its deployment.
Roger Spinner from s2a systems found Langbroek’s observations plausible, suggesting a 'slow rotation' of the spacecraft, which further indicates its unstable condition.
NASA engineers have reassured that the current tumbling motion of ACS3 is intentional and part of the testing process for the solar sail concept.
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