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Published online 12 January 2007 | Nature | doi:10.1038/news070108-12

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Bright comet provides rare view

Close pass should reveal elementary secrets.

As Comet McNaught makes its closest pass to the Sun today, researchers are using the rare occurrence to take some stunning photos and hopefully learn something new about what comets are made of.

Already the space-bound STEREO mission has snapped the highest-resolution images ever taken of the fine structure of a comet's tail as it passes close to the Sun, just when the dust is being driven off most violently.

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