Titlebook: Handbook of Cosmic Hazards and Planetary Defense; Firooz Allahdadi,Joseph N. Pelton Living reference work 20200th edition

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https://doi.org/10.1007/978-94-6351-044-8 now be detected, modeled, and accounted for. The second topic to be discussed is the phenomenon of “keyholes,” which are gravitational gateways that can take an asteroid from a close approach on one passage by the Earth to a later impact with our planet. Mapping the keyholes for a potential impacto

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