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Cometary Flurries

HRI cloud of particles before and after deconvolution Click for larger image.
HRI image of ice particle cloud morphing from the out of focus (undeconvolved) to deconvolved (sharpened) view.

HRI undeconvolvedClick for larger image. HRI deconvolvedClick for larger image.

The before and after still images used to make the animation.

Caption: This zoomed in image from the High Resolution Instrument shows particles swirling in a "snow storm" around the nucleus of comet Hartley 2. From these images we can estimate the size of the particles and we use a combination of other data to determine that these are icy particles rather than dust. Although the largest particles are golfball to basketball sized, they are very porous and fluffy.

Credit: NASA/JPL-Caltech/UMD

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