EPOXI
Two intriguing investigations -- One flight-proven spacecraft
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The Many Faces of Hartley 2
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Caption: Distribution maps of the coma can be made from infrared scans. These HRI-IR maps show the carbon dioxide, dust, and ice distribution as being similar and apparently emanating from the same locations on the nucleus. The water vapor, however, has a different distribution implying a different source region and process.
Credit: NASA/JPL-Caltech/UMD
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