| http://www.w3.org/ns/prov#value | - The potential for disaster is not lost on the scientific community, especially since 1994, when scientists watched comet Shoemaker-Levy crash into the giant gas planet Jupiter, leaving scars that could be seen for months. (In July 2009, another, unidentified object hit Jupiter, leaving a black spot the size of the Pacific Ocean.) he is why NASA began tracking near-earth objects" shortly after Sh
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