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Moving Sky Espied by Digital Eye

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Daniel C. McCarthy

Scientists estimate that there are between 1000 and 2000 asteroids capable of colliding with Earth and causing a mass extinction similar to the one that brought down the curtain on the dinosaurs. Finding these killer rocks is the focus of the Near Earth Asteroid Tracking program run by NASA's Jet Propulsion Laboratory. The asteroid Kytheria appears in the center of the upper left, middle center and lower right 25 x 25-pixel panels. Digital imaging integrated into the Oschin telescope helped identify and track the movement of the potentially Earth-threatening asteroid against a static...Read full article

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