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![]() Date: 2008-02-25 18:50:5499942 Apophis European Space Agency Asteroids Houyi Don Quijote Asteroid-impact avoidance Fobos-Grunt CubeSat Asteroid Spaceflight Space Planetary defense | Source URL: planetary.s3.amazonaws.comDownload Document from Source WebsiteFile Size: 1,38 MBShare Document on Facebook |