Light Sail-2 (LS-2), a largely crowdfunded solar sail project that could one day help resupply human missions to Mars, received a boost from the success of a spacecraft propulsion demonstration. Within days of the July 23 deployment of its 32-m2 (344-ft.2) solar sail, the 11-lb. LS-2 small satellite’s Earth orbital apogee increased by 1.7 km (1.1 mi.), The Planetary Society—a Pasadena, California-based nonprofit—announced on July 31. “We are thrilled to declare ...

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