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 Date: 2011-09-30 14:33:42Planetary science Antoine de Saint-Exupéry B612 Foundation Gravity tractor Centroid 99942 Apophis Keyway Geometry Space Planetary defense |
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Date: 2011-09-30 14:33:42Planetary science Antoine de Saint-Exupéry B612 Foundation Gravity tractor Centroid 99942 Apophis Keyway Geometry Space Planetary defense |
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Keck Institute of Space Studies Workshop on Moving an Asteroid 28 Sept 2011 Fundamentals of NEO Deflection Rusty Schweickart,