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The Dark Side of Pluto
Tod R. Lauer, John R. Spencer, Tanguy Bertrand +12
During its departure from Pluto, New Horizons used its LORRI camera to image a portion of Pluto's southern hemisphere that was in a decades-long seasonal winter darkness, but still…
Morphological Comparison of Blocks in Chaos Terrains on Pluto, Europa, and Mars
Helle L. Skjetne, Kelsi N. Singer, Brian M. Hynek +12
Chaos terrains are characterized by disruption of preexisting surfaces into irregularly arranged mountain blocks with a chaotic appearance. Several models for chaos formation have…
Charon: A brief history of tides
Alyssa Rose Rhoden, Helle L. Skjetne, Wade G. Henning +9
In 2015, the New Horizons spacecraft flew past Pluto and its moon Charon, providing the first clear look at the surface of Charon. New Horizons images revealed an ancient surface,…
Pluto's Ultraviolet Spectrum, Surface Reflectance, and Airglow Emissions
Andrew J. Steffl, Leslie A. Young, Darrell F. Strobel +16
During the New Horizons spacecraft's encounter with Pluto, the Alice ultraviolet spectrograph conducted a series of observations that detected emissions from both the interplanetar…
Distribution and Energy Balance of Pluto's Nitrogen Ice, as seen by New Horizons in 2015
Briley Lewis, John Stansberry, Bryan Holler +10
Pluto's surface is geologically complex because of volatile ices that are mobile on seasonal and longer time scales. Here we analyzed New Horizons LEISA spectral data to globally m…
Plutos Far Side
S. A. Stern, O. L. White, P. J. McGovern +11
The New Horizons spacecraft provided near global observations of Pluto that far exceed the resolution of Earth-based data sets. Most Pluto New Horizons analysis hitherto has focuse…
Pluto's Haze as a Surface Material
W. M. Grundy, T. Bertrand, R. P. Binzel +37
Pluto's atmospheric haze settles out rapidly compared with geological timescales. It needs to be accounted for as a surface material, distinct from Pluto's icy bedrock and from the…
Formation of Charon's Red Poles From Seasonally Cold-Trapped Volatiles
W. M. Grundy, D. P. Cruikshank, G. R. Gladstone +38
A unique feature of Pluto's large satellite Charon is its dark red northern polar cap. Similar colours on Pluto's surface have been attributed to organic macromolecules produced by…
The CH4 cycles on Pluto over seasonal and astronomical timescales
T. Bertrand, F. Forget, O. M. Umurhan +13
New Horizons observations suggest that CH4 on Pluto has a complex history, involving reservoirs of different composition, thickness and stability controlled by volatile processes o…
Impact Craters on Pluto and Charon Indicate a Deficit of Small Kuiper Belt Objects
K. N. Singer, W. B. McKinnon, B. Gladman +20
The flyby of Pluto and Charon by the New Horizons spacecraft provided high-resolution images of cratered surfaces embedded in the Kuiper belt, an extensive region of bodies orbitin…
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 nitrogen cycles on Pluto over seasonal and astronomical timescales
T. Bertrand, F. Forget, O. M. Umurhan +13
Pluto's landscape is shaped by the cycles of the volatile ices covering its surface. In particular, the Sputnik Planitia (SP) ice sheet displays a large diversity of terrains, with…
The New Horizons and Hubble Space Telescope Search For Rings, Dust, and Debris in the Pluto-Charon System
Tod R. Lauer, Henry B. Throop, Mark R. Showalter +11
We searched for dust or debris rings in the Pluto-Charon system before, during, and after the New Horizons encounter. Methodologies included searching for back-scattered light duri…
New Horizons Upper Limits on O in Pluto's Present Day Atmosphere
J. A. Kammer, S. A. Stern, G. R. Gladstone +5
The surprising discovery by the Rosetta spacecraft of molecular oxygen (O) in the coma of comet 67P/Churyumov-Gerasimenko (Bieler et al. 2015) challenged our understanding of t…
Evidence for Possible Clouds in Pluto's Present Day Atmosphere
S. A. Stern, J. A. Kammer, E. L. Barth +10
Several trace constituents can reach saturation vapor pressure in Pluto's present day atmosphere. As such, we describe a search for discrete could features in Pluto's atmosphere us…
Structure and Composition of Pluto's atmosphere from the New Horizons Solar Ultraviolet Occultation
Leslie A. Young, Joshua A. Kammer, Andrew J. Steffl +23
The Alice instrument on NASA's New Horizons spacecraft observed an ultraviolet solar occultation by Pluto's atmosphere on 2015 July 14. The transmission vs. altitude was sensitive…
Constraints on the Microphysics of Pluto's Photochemical Haze from New Horizons Observations
Peter Gao, Siteng Fan, Michael L. Wong +12
The New Horizons flyby of Pluto confirmed the existence of hazes in its atmosphere. Observations of a large high- to low- phase brightness ratio, combined with the blue color of th…
Modeling glacial flow on and onto Pluto's Sputnik Planitia
O. M. Umurhan, A. D. Howard, J. M. Moore +12
Observations of Pluto's surface made by the New Horizons spacecraft indicates present-day nitrogen ice glaciation in and around the basin known as Sputnik Planum. Motivated by thes…
Plutos interaction with its space environment: Solar Wind, Energetic Particles & Dust
F. Bagenal, M. Horányi, D. J. McComas +23
The New Horizons spacecraft carried three instruments that measured the space environment near Pluto as it flew by on 14 July 2015. The Solar Wind Around Pluto instrument revealed…
The First High-Phase Observations of a KBO: New Horizons Imaging of (15810) 1994 JR1 from the Kuiper Belt
Simon B. Porter, John R. Spencer, Susan Benecchi +12
NASA's New Horizons spacecraft observed (15810) 1994 JR, a 3:2 resonant Kupier Belt Object (KBO), using the LOng Range Reconnaissance Imager (LORRI) on November 2, 2015 from a…
The Geology of Pluto and Charon Through the Eyes of New Horizons
Jeffrey M. Moore, William B. McKinnon, John R. Spencer +38
NASA's New Horizons spacecraft has revealed the complex geology of Pluto and Charon. Pluto's encounter hemisphere shows ongoing surface geological activity centered on a vast basin…
Surface Compositions Across Pluto and Charon
W. M. Grundy, R. P. Binzel, B. J. Buratti +32
The New Horizons spacecraft mapped colors and infrared spectra across the encounter hemispheres of Pluto and Charon. The volatile ices CH, CO, and N, that dominate Pluto's…
The Small Satellites of Pluto as Observed by New Horizons
H. A. Weaver, M. W. Buie, B. J. Buratti +48
The New Horizons mission has provided resolved measurements of Pluto's moons Styx, Nix, Kerberos, and Hydra. All four are small, with equivalent spherical diameters of 40…
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…