ScienceCasts: Close Approach Comets

In 2017 and 2018, three comets will pass near the Earth providing the opportunity to observe and study these icy interlopers. Click here to see more videos: https://alugha.com/NASA Visit http://science.nasa.gov/ for more. 4*P Morphology Campaign: http://www.psi.edu/41P45P46P

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