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Large-scale cryovolcanic resurfacing on Pluto
Kelsi N. Singer, Oliver L. White, Bernard Schmitt +22
The New Horizons spacecraft returned images and compositional data showing that terrains on Pluto span a variety of ages, ranging from relatively ancient, heavily cratered areas to…
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…
The science case for spacecraft exploration of the Uranian satellites: Candidate ocean worlds in an ice giant system
Richard J. Cartwright, Chloe B. Beddingfield, Tom A. Nordheim +15
The 27 satellites of Uranus are enigmatic, with dark surfaces coated by material that could be rich in organics. Voyager 2 imaged the southern hemispheres of Uranus' five largest '…
Initial results from the New Horizons exploration of 2014 MU69, a small Kuiper Belt Object
S. A. Stern, H. A. Weaver, J. R. Spencer +202
The Kuiper Belt is a distant region of the Solar System. On 1 January 2019, the New Horizons spacecraft flew close to (486958) 2014 MU69, a Cold Classical Kuiper Belt Object, a cla…
The Geology and Geophysics of Kuiper Belt Object (486958) Arrokoth
J. R. Spencer, S. A. Stern, J. M. Moore +75
The Cold Classical Kuiper Belt, a class of small bodies in undisturbed orbits beyond Neptune, are primitive objects preserving information about Solar System formation. The New Hor…
Photometry of Kuiper Belt Object (486958) Arrokoth from New Horizons LORRI
Jason D. Hofgartner, Bonnie J. Buratti, Susan D. Benecchi +14
On January 1st 2019, the New Horizons spacecraft flew by the classical Kuiper belt object (486958) Arrokoth (provisionally designated 2014 MU69), possibly the most primitive object…
Reorientation of Sputnik Planitia implies a Subsurface Ocean on Pluto
F. Nimmo, D. P. Hamilton, W. B. McKinnon P. M. Schenk +60
The deep nitrogen-covered Sputnik Planitia (SP; informal name) basin on Pluto is located very close to the longitude of Pluto's tidal axis[1] and may be an impact feature [2], by a…
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…
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…
Great Expectations: Plans and Predictions for New Horizons Encounter with Kuiper Belt Object 2014 MU69 ('Ultima Thule')
Jeffrey M. Moore, William B. McKinnon, Dale P. Cruikshank +31
The New Horizons encounter with the cold classical Kuiper Belt object (KBO) 2014 MU69 (informally named 'Ultima Thule,' hereafter Ultima) on 1 January 2019 will be the first time a…
A Search for Temporal Changes on Pluto and Charon
J. D. Hofgartner, B. J. Buratti, S. L. Devins +12
A search for temporal changes on Pluto and Charon was motivated by (1) the discovery of young surfaces in the Pluto system that imply ongoing or recent geologic activity, (2) the d…
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…
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…
Global Albedos of Pluto and Charon from LORRI New Horizons Observations
B. J. Buratti, J. D. Hofgartner, M. D. Hicks +14
The exploration of the Pluto-Charon system by the New Horizons spacecraft represents the first opportunity to understand the distribution of albedo and other photometric properties…
The Pluto system: Initial results from its exploration by New Horizons
S. A. Stern, F. Bagenal, K. Ennico +148
The Pluto system was recently explored by NASA's New Horizons spacecraft, making closest approach on 14 July 2015. Pluto's surface displays diverse landforms, terrain ages, albedos…