New Horizons Mapping of Europa and Ganymede

@article{Grundy2007NewHM,
  title={New Horizons Mapping of Europa and Ganymede},
  author={W. Grundy and B. Buratti and A. Cheng and J. Emery and A. Lunsford and W. McKinnon and J. Moore and S. Newman and C. Olkin and D. Reuter and P. Schenk and J. Spencer and S. Stern and H. Throop and H. Weaver},
  journal={Science},
  year={2007},
  volume={318},
  pages={234 - 237}
}
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… Expand

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References

SHOWING 1-10 OF 19 REFERENCES
Salts on Europa's surface detected by Galileo's near infrared mapping spectrometer. The NIMS Team.
TLDR
Reflectance spectra obtained by Galileo's Near Infrared Mapping Spectrometer exhibit distorted water absorption bands that indicate the presence of hydrated minerals, and may represent evaporite deposits formed by water, rich in dissolved salts, reaching the surface from a water-rich layer underlying an ice crust. Expand
Hydrated salt minerals on Europa's surface from the Galileo near‐infrared mapping spectrometer (NIMS) investigation
We reported evidence of heavily hydrated salt minerals present over large areas of Europa's surface from analysis of reflectance spectra returned by the Galileo mission near infrared mappingExpand
Amorphous and crystalline ice on the Galilean satellites: A balance between thermal and radiolytic processes
[1] The water ice on the three outermost Galilean satellites of Jupiter has a lattice structure that can vary from crystalline to amorphous. Amorphous ice is crystallized by heating, whileExpand
Is There Evidence for Polar Wander on Europa
Abstract The orientations of the albedo lineaments, bands, and lineations on Europa's surface have been compared in previous studies with the global stress fields set up by orbital eccentricity,Expand
Hydrated Salt Minerals on Ganymede's Surface: Evidence of an Ocean Below
TLDR
Reflectance spectra from Galileo's near-infrared mapping spectrometer (NIMS) suggests that the surface of Ganymede, the largest satellite of Jupiter, contains hydrated materials that are similar to those found on Europa. Expand
Exogenic and endogenic albedo and color patterns on Europa
New global and high-resolution multispectral mosaics of Europa have been produced from the Voyager imaging data. Photometric normalizations are based on multiple-image techniques that explicitlyExpand
Voyager photometry of Europa
Abstract Ninety voyager images ranging in phase angle from 3 to 143° and covering the spectral range from 0.34 to 0.58 μm were analyzed to derive the photometric properties of Europa. At small phaseExpand
Polar Wander and Surface Convergence of Europa's Ice Shell: Evidence from a Survey of Strike-Slip Displacement
Two global issues regarding Europa are addressed by a survey of strike-slip faults. First, a common type of terrain that appears to represent convergent sites of surface removal, which may helpExpand
An experimental estimate of Europa's “ocean” composition independent of Galileo orbital remote sensing
We have conducted a series of experiments designed to simulate, in the laboratory, the development of any subsurface aqueous phase on Europa. In our theoretical-experimental approach we select aExpand
Empirical constraints on the salinity of the europan ocean and implications for a thin ice shell
Induced electrical currents within Europa inferred from Galileo spacecraft magnetometer instrument data have been interpreted as due to a salty europan ocean. Published compositional models forExpand
...
1
2
...