title: 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.
authors.affiliation: Lowell Observatory, 1400 West Mars Hill Road, Flagstaff, AZ 86001, USA. mshowalter@seti.org
authors.forename: W M
authors.initials: WM
authors.lastname: Grundy
authors.forename: B J
authors.initials: BJ
authors.lastname: Buratti
authors.forename: A F
authors.initials: AF
authors.lastname: Cheng
authors.forename: J P
authors.initials: JP
authors.lastname: Emery
authors.forename: A
authors.initials: A
authors.lastname: Lunsford
authors.forename: W B
authors.initials: WB
authors.lastname: McKinnon
authors.forename: J M
authors.initials: JM
authors.lastname: Moore
authors.forename: S F
authors.initials: SF
authors.lastname: Newman
authors.forename: C B
authors.initials: CB
authors.lastname: Olkin
authors.forename: D C
authors.initials: DC
authors.lastname: Reuter
authors.forename: P M
authors.initials: PM
authors.lastname: Schenk
authors.forename: J R
authors.initials: JR
authors.lastname: Spencer
authors.forename: S A
authors.initials: SA
authors.lastname: Stern
authors.forename: H B
authors.initials: HB
authors.lastname: Throop
authors.forename: H A
authors.initials: HA
authors.lastname: Weaver
mesh_terms: D005118:Extraterrestrial Environment; D007053:Ice; D018538:Jupiter; D018531:Spacecraft; D014867:Water
chemical_list: D007053:Ice; D014867:Water