The Process of Tholin Formation in Titan's Upper Atmosphere

@article{Waite2007ThePO,
  title={The Process of Tholin Formation in Titan's Upper Atmosphere},
  author={J. H. Waite and David T. Young and Thomas E. Cravens and Andrew J. Coates and F. Crary and Brian A. Magee and Joseph Westlake},
  journal={Science},
  year={2007},
  volume={316},
  pages={870 - 875}
}
Titan's lower atmosphere has long been known to harbor organic aerosols (tholins) presumed to have been formed from simple molecules, such as methane and nitrogen (CH4 and N2). Up to now, it has been assumed that tholins were formed at altitudes of several hundred kilometers by processes as yet unobserved. Using measurements from a combination of mass/charge and energy/charge spectrometers on the Cassini spacecraft, we have obtained evidence for tholin formation at high altitudes (∼1000… 

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