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Near-Earth Objects/Planetary Defense

Near-Earth Objects/Planetary Defense
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NASA says there are some 28,000 comets and asteroids in our planet’s neighborhood, with more being discovered every day. Fortunately, the space agency also says the probability of a major collision is quite small. Dr. Paul Chodas, manager of NASA’s Center for Near-Earth Object Studies, joins Rick Pantaleo on the Science Edition of Press Conference USA to talk about asteroids and other near-Earth objects.