Identification of comet Hyakutake's extremely long ion tail from magnetic field signatures

@article{Jones2000IdentificationOC,
  title={Identification of comet Hyakutake's extremely long ion tail from magnetic field signatures},
  author={Geraint H. Jones and Andr{\'e} Balogh and Timothy S. Horbury},
  journal={Nature},
  year={2000},
  volume={404},
  pages={574-576}
}
Observations of the varying orientations of comet tails led to the suggestion of the existence of the solar wind—a continuous outflow of ionized material from the Sun. It is now well established that gas from comets is ionized by several processes and joins the solar wind, forming an ion (plasma) tail that points away from the Sun. The plasma environments of three comets have been measured in situ, but only in the upstream direction or less than 8,000 km downstream of the nucleus. Here we… 

Interception of comet Hyakutake's ion tail at a distance of 500 million kilometres

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Interception of comet Hyakutake's ion tail at a distance of 500 million kilometres

TLDR
The serendipitous detection of cometary pick-up ions, most probably associated with the tail of comet Hyakutake, at a distance of 3.4 au from the nucleus suggests that remote sampling of comet compositions, and the discovery of otherwise invisible comets, may be possible.

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