A5089323225- Astro and Planetary Science
- Planetary Science and Exploration
- Geology and Paleoclimatology Research
- Geomagnetism and Paleomagnetism Studies
- Spacecraft and Cryogenic Technologies
- Geological and Geochemical Analysis
- Methane Hydrates and Related Phenomena
- earthquake and tectonic studies
- Space Exploration and Technology
- High-pressure geophysics and materials
- Stellar, planetary, and galactic studies
- Marine and environmental studies
- Archaeology and ancient environmental studies
- Geophysics and Gravity Measurements
- High-Velocity Impact and Material Behavior
- Historical Astronomy and Related Studies
- Isotope Analysis in Ecology
- Geological Modeling and Analysis
- Rock Mechanics and Modeling
- Drilling and Well Engineering
- Space Science and Extraterrestrial Life
- Space Satellite Systems and Control
- Atomic and Molecular Physics
- Mass Spectrometry Techniques and Applications
- Cryospheric studies and observations
University of Derby
2025
Wheaton College - Massachusetts
2015-2024
Wheaton College - Illinois
2003-2022
United States Naval Research Laboratory
2005-2006
Naval Research Laboratory Chemistry Division
2005
The Aerospace Corporation
2005
Brown University
1996-2000
Arizona State University
2000
Cornell University
2000
Ames Research Center
2000
It has been proposed that Jupiter's satellite Europa currently possesses a global subsurface ocean of liquid water. Galileo gravity data verify the is differentiated into an outer H 2 O layer about 100 km thick but cannot determine current physical state this (liquid or solid). Here we summarize geological evidence regarding extant ocean, concentrating on imaging data. We describe and assess nine pertinent lines evidence: impact morphologies, lenticulae, cryovolcanic features, pull‐apart...
In this article, we summarize the work of NASA Outer Planets Assessment Group (OPAG) Roadmaps to Ocean Worlds (ROW) group. The aim group is assemble scientific framework that will guide exploration ocean worlds, and identify prioritize science objectives for worlds over next several decades. overarching goal an program as defined by ROW "identify characterize their oceans, evaluate habitability, search life, ultimately understand any life find." team supports creation studies full spectrum...
Abstract The goal of NASA’s Europa Clipper mission is to assess the habitability Jupiter’s moon Europa. After entering Jupiter orbit in 2030, flight system will collect science data while flying past 49 times at typical closest approach distances 25–100 km. mission’s objectives are investigate Europa’s interior (ice shell and ocean), composition, geology; also search for characterize any current activity including possible plumes. be accomplished with a payload consisting remote sensing...
Abstract Geological investigations planned for the Europa Clipper mission will examine formation, evolution, and expression of geomorphic structures found on surface. Understanding geologic features, their any recent activity are key inputs in constraining Europa’s potential habitability. In addition to providing information about moon’s habitability, study is compelling itself. Here we provide a high-level, cross-instrument, cross-discipline overview within mission. fascinating collection...
Research Article| March 01, 2013 Fluvial features on Titan: Insights from morphology and modeling Devon M. Burr; Burr † 1Earth Planetary Sciences Department, University of Tennessee–Knoxville, 1412 Circle Drive, Knoxville, Tennessee 37996-1410, USA †E-mail: dburr1@utk.edu Search for other works by this author on: GSW Google Scholar J. Taylor Perron; Perron 2Department Earth, Atmospheric, Sciences, Massachusetts Institute Technology, 77 Avenue, Cambridge, 02139, Michael P. Lamb; Lamb...
The first images of Jupiter, Io, Europa, and Ganymede from the Galileo spacecraft reveal new information about Jupiter's Great Red Spot (GRS) surfaces Galilean satellites. Features similar to clusters thunderstorms were found in GRS. Nearby wave structures suggest that GRS may be a shallow atmospheric feature. Changes surface color plume distribution indicate differences resurfacing processes near hot spots on Io. Patchy emissions seen while Io was eclipse by Jupiter. outer margins prominent...
Galileo data enable the major geological units, structures, and surface features to be identified on Europa. These include five primary units (plains, chaos, band, ridge, crater materials) their subunits, along with various tectonic structures such as faults. Plains are most widespread. Ridged plains material spans a wide range of ages, including oldest recognizable Europa, appears represent style resurfacing, rather than cryovolcanism. Smooth typically embays other terrains possibly type...
Ice resistance to tensile fracture influences surface morphodynamics on outer planetary satellites such as Titan, yet measurements of strength and toughness polycrystalline water ice at temperatures below terrestrial conditions (<220 K) have not been previously reported. We investigated these parameters from 260 K 110 using a walk‐in freezer, chilling by dry liquid nitrogen. also the influence solid impurity concentration spread in crystal grain size distribution. Although showed no...
Research Article| October 01, 2015 Global thrust faulting on the Moon and influence of tidal stresses Thomas R. Watters; Watters * 1Center for Earth Planetary Studies, Smithsonian Institution, Washington, D.C. 20560, USA *E-mail: watterst@si.edu Search other works by this author on: GSW Google Scholar Mark S. Robinson; Robinson 2School Space Exploration, Arizona State University, Tempe, 85251, Geoffrey C. Collins; Collins 3Physics Astronomy Department, Wheaton College, Norton, Massachusetts...
High-resolution Galileo imaging has provided important insight into the origin and evolution of grooved terrain on Ganymede. The Uruk Sulcus target site was first imaged at high resolution, considerations viewing geometry, low image compression, complementary stereo make this region extremely informative. Contrast variations in these low-incidence angle images are extreme give visual impression topographic shading. However, photometric analysis shows that scene must owe its character to...
Chaotic terrain on Europa is interpreted to be the result of breakup brittle surface materials over a mobile substrate. Two end‐member models have been proposed for substrate: liquid water ocean or solid warm ductile ice. Direct contact between ice and an underlying might accomplished by melting through Europa's shell, but plausible sources thermal energy are insufficient locally melt shell. We calculate that partially substrate probably necessary tilted blocks observed, challenging...
Franco Pirajno. Pp. 679. 2013. Springer. ISBN 978-94-007-4443-1. Price: €129.95. This is Pirajno’s fourth book, the first three being Hydrothermal Mineral Deposits – Principles and Fundamental Concepts for Exploration Geologist (1992), Ore Mantle Plumes (2000), Processes Systems (2009). Prior to publication of this a similar topic was covered in massive five-volume set, published 1990 China, covering 1,585 pages more than 25 chapters, suitably authored by an editorial committee. This modest...
New Galileo images of Europa reveal regions chaotic terrain in otherwise highly‐lineated background plains. Examination Conamara Chaos shows that 59% the region is composed fine‐textured matrix material lying at low elevations and formed by destruction lineated plains, while remainder consists 139 fragmented polygons linear‐textured Using through‐trending linear features, we reconstruct original positions chaos find significant lateral translation rotation have occurred: 78% undergone...
Hydrothermal plumes may be responsible for transmitting radiogenic or tidally generated heat from Europa's rocky interior through a liquid ocean to the base of its ice shell. This process has been implicated in formation chaos regions and lenticulae by melting exciting convection layer. In contrast earlier work, we argue that should treated as an unstratified fluid. We have adapted expanded upon existing work describing buoyant rotating, environment. discuss scaling laws governing flow...
The NASA Europa Clipper mission will explore Jupiter&#8217;s icy moon via multiple flybys in the early 2030s (Pappalardo et al., 2024). ocean world is one of most promising locations to search for life elsewhere Solar System and thus, Clipper&#8217;s main goal characterize Europa&#8217;s habitability (Vance 2024).In future, a follow-on landed may possibly from its surface (Phillips revision). Based on current technology, terrain relative navigation (TRN) would be used safely...