Do look up: Arizona scientists have hand in first ‘planetary defense’ test

A NASA illustration imagines what the DART – Double Asteroid Redirection Test – spacecraft will look like shortly before its collision Monday with Didymos binary asteroid system, in the first full-scale test of a planetary defense system. (Illustration by Steve Gribben/NASA, Johns Hopkins APL vis Cronkite News)

A NASA illustration imagines what the DART – Double Asteroid Redirection Test – spacecraft will look like shortly before its collision Monday with Didymos binary asteroid system, in the first full-scale test of a planetary defense system. (Illustration by Steve Gribben/NASA, Johns Hopkins APL vis Cronkite News)

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