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The infrared spectrum of comet Hale-Bopp, as observed with the Infrared Space Observatory (ISO), presents astonishing similarities
with those of the dusty disks surrounding young stars. The prominent spectral features of crystalline silicates that occur
in comets, have been observed in the circumstellar media of young and old stars, yet not in the interstellar medium. We suggest
from the analogy with the young-star spectra that the crystalline nature of the silicates in comet Hale-Bopp dates from the
early evolution of the solar system, and also that an Oort Cloud or Kuiper Belt is presently forming around young stars observed
by ISO.
This revised version was published online in July 2006 with corrections to the Cover Date. 相似文献
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