New Horizons Mapping of Europa and Ganymede
Abstract
The New Horizons spacecraft observed Jupiter's icy satellites Europa and Ganymede during its flyby in February and March 2007 at visible and infrared wavelengths. Infrared spectral images map H2O ice absorption and hydrated contaminants, bolstering the case for an exogenous source of Europa's “non-ice†surface material and filling large gaps in compositional maps of Ganymede's Jupiter-facing hemisphere. Visual wavelength images of Europa extend knowledge of its global pattern of arcuate troughs and show that its surface scatters light more isotropically than other icy satellites.
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We thank the entire New Horizons mission team and our colleagues on the New Horizons science team. New Horizons is funded by NASA, whose financial support we gratefully acknowledge. We also thank C. A. Hibbits, J. B. Dalton III, G. B. Hansen, and K. Stephan for valuable scientific discussions as well as providing examples of NIMS data.
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Published In
Science
Volume 318 | Issue 5848
12 October 2007
12 October 2007
Copyright
American Association for the Advancement of Science.
Submission history
Received: 10 July 2007
Accepted: 21 September 2007
Published in print: 12 October 2007
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