Planetary Defense: Catastrophic Health Insurance for Planet Earth

摘要

Concern exists among an increasing number of scientists throughout the world regarding the possibility of a catastrophic event caused by an impact of a large earth crossing object (ECO) on the Earth Moon System (EMS), be it an asteroid or comet. Such events, although rare for large objects (greater than 1 kilometer diameter), are not unprecedented. collectively as a global community, no current viable capability exists to defend the EMS against a large ECO, leaving its inhabitants vulnerable to possible death and destruction of untold proportion and even possible extinction of the human race. In this regard, a planetary defense system (PDS) capability should be resourced, developed and deployed. At this time Planetary Defense is not an assigned or approved mission of the Department of Defense or the Air Force.