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Latest Image: First Resolved Image of a Long-Period Comet's Nucleus
These images were taken of comet C/2013 A1 Siding Spring by NASA's Mars ...
Latest Video: Countdown to Pluto
Eight years after it left Earth, NASA's New Horizons spacecraft is approaching Pluto. The encounter begins less than a year from now.
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Check out interactives, images and educational resources from NASA related to the small worlds of the solar system.
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