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Astronomy: Space Exploration

World Book Online

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National Geographic - Space Exploration

Bill Nye and NASA scientists celebrate 50 years of solar system exploration, and look forward to what's to come.

National Geographic. “National Geographic Live! – Solar System Exploration: 50 Years and Counting.” Online Video Clip. YouTube. YouTube, 10 Dec 2012. Web. 18 Oct 2015.

< https://www.youtube.com/watch?v=htOtW0pD92Y>