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"NASA Learning Objects: Asteroid and Comet Impact Hazards Site" icon

NASA Learning Objects: Asteroid and Comet Impact Hazards Site

The Earth orbits the Sun in a sort of cosmic shooting gallery, subject to impacts from comets and asteroids. It is only fairly recently that we have come to appreciate that these impacts by asteroids and comets (often called Near Earth Objects, or NEOs) pose a significant hazard to life and property. Most of the hazard is from asteroid impacts; comets make only a minor contribution. Although the annual probability of the Earth being struck by a...

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