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Capturing close-up comet images (web extra)
Web extra: Comet expert Prof Alan Fitzsimmons talks with Rosetta scientist Dr Holger Sierks about the dramatic images his camera has returned of the surface of comet 67P.
Duration:
This clip is from
More clips from Rosetta: A Sky at Night Special
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How to make a comet (web extra)
Duration: 04:48
