259 citations
- Southwest Research InstituteUS6 papers
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- Center for Astrophysics Harvard & SmithsonianUS1 paper
4 papers · 1 filter
On Charon's Far-Ultraviolet Surface Reflectance
Brian A. Keeney, Joel Wm. Parker, Nathaniel Cunningham +3
We present the first measurements of Charon's far-ultraviolet surface reflectance, obtained by the Alice spectrograph on New Horizons. We find no measurable flux shortward of 1650…
The Lyman-α Sky Background as Observed by New Horizons
G. Randall Gladstone, Wayne R. Pryor, S. Alan Stern +22
Recent observations of interplanetary medium (IPM) atomic hydrogen Lyman-α (Lyα) emission in the outer solar system, made with the Alice ultraviolet spectrograph on New Horizons (N…
The Atmosphere of Pluto as Observed by New Horizons
G. Randall Gladstone, S. Alan Stern, Kimberly Ennico +31
Observations made during the New Horizons flyby provide a detailed snapshot of the current state of Pluto's atmosphere. While the lower atmosphere (at altitudes <200 km) is consist…
Rosetta-Alice Observations of Exospheric Hydrogen and Oxygen on Mars
Paul D. Feldman, Andrew J. Steffl, Joel Wm. Parker +9
The European Space Agency's Rosetta spacecraft, en route to a 2014 encounter with comet 67P/Churyumov-Gerasimenko, made a gravity assist swing-by of Mars on 25 February 2007, close…