Catalyzing H2O2 tank; ARCA goes supersonic; Solar sails vs Apophis

Paul Breed describes another unboxed concept for his nanolauncher project: Way out of the box pressure system… – Unreasonable Rocket. === I know ARCA likes water systems but a supersonic seaplane first stage for their GLXP launcher jumps the shark: Supersonic airplane for the Google Lunar X Prize – X PRIZE Foundation. === Deflect an asteroid? Is there anything solar sails can’t do! Solar Sail Flotilla Could Divert Possibly Dangerous Asteroid – SPACE.com

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