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Comet landing: What happens next? - CBS News
www.cbsnews.com
Dr. Derrick Pitts of The Franklin Institute in Philadelphia, breaks down the Philae comet landing and explains why it's an important step for the...
2016 Astronomy Outreach Ambassadors to Visit World-class...
public.nrao.edu
... of New York College at Oneonta; Derrick Pitts, chief astronomer and director of the Fels Planetarium at The Franklin Institute in Philadelphia; ...
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