Stepping Out into the Solar System...
There is no question that there are dangerous denizens of deep space — troublemaking asteroids that could have Earth in their crosshairs and smash into our planet. Once garnering a high-rating on the “giggle factor” listing of planetary worries, experts concur that the chance of a civilization-crippling impact by a large space rock is low ... but it is not zero.
KeywordsInternational Space Station Space Shuttle Human Exploration Image Courtesy Rubble Pile
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