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Science 7 January 2000:
Vol. 287. no. 5450, pp. 53 - 54
DOI: 10.1126/science.287.5450.53
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Perspectives

PLANETARY SCIENCE:
Charon's First Detailed Spectra Hold Many Surprises

Eliot Young

The first detailed spectra of Pluto's satellite Charon confirm the presence of H2O frost. No CH4 or N2 is seen, although both are abundant on nearby Pluto. The state of the H2O ice is crystalline, not amorphous, a surprise given Charon's expected cold surface temperatures. NH3 may also be present, which would make Charon the first satellite in the solar system with a positive NH3-frost detection.

The author is at Southwestern Research Institute, Boulder, CO 80302, USA. E-mail: efy{at}boulder.swri.edu

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THIS ARTICLE HAS BEEN CITED BY OTHER ARTICLES:
New Goals for the U.S. Human Genome Project: 1998-2003.
F. S. Collins, A. Patrinos, E. Jordan, A. Chakravarti, R. Gesteland, L. Walters, and the members of the DOE and NIH planning groups (1998)
Science 282, 682-689
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