Patrick Moore talks to the world's leading comet experts about the fallout from NASA's impactor probe, Deep Impact, to the comet 9P/Tempel-1. Chris Lintott reports from the Palomar Observatory. Show more
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Patrick Moore talks to the world's leading comet experts about the fallout from NASA's impactor probe, Deep Impact, to the comet 9P/Tempel-1. Chris Lintott reports from the Palomar Observatory. Show more