A5016596014- Planetary Science and Exploration
- Astro and Planetary Science
- Space Exploration and Technology
- Aeolian processes and effects
- Geology and Paleoclimatology Research
- Space Science and Extraterrestrial Life
- Space exploration and regulation
- Biocrusts and Microbial Ecology
- Spaceflight effects on biology
- Scientific Research and Discoveries
- Spacecraft and Cryogenic Technologies
- Marine and environmental studies
- Geological formations and processes
- Spacecraft Design and Technology
- Hydrocarbon exploration and reservoir analysis
- Geological and Geochemical Analysis
- Landslides and related hazards
- Cryospheric studies and observations
- Soil erosion and sediment transport
- Health and Medical Research Impacts
- Career Development and Diversity
- Climate change and permafrost
- Climate Change and Geoengineering
- Coastal and Marine Management
- Methane Hydrates and Related Phenomena
California Institute of Technology
2012-2024
Jet Propulsion Laboratory
2015-2024
Ames Research Center
2021
Southwest Research Institute
2021
Walker (United States)
2021
University of Cambridge
2021
Northern Arizona University
2021
Planetary Science Institute
2021
Cornell University
2021
University of California, Los Angeles
2021
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...
Despite radically different environmental conditions, terrestrial and martian dunes bear a strong resemblance, indicating that the basic processes of saltation grainfall (sand avalanching down dune slipface) operate on both worlds. Here, we show are subject to an additional modification process not found Earth: springtime sublimation Mars' CO(2) seasonal polar caps. Numerous in north region have experienced morphological changes within Mars year, detected images acquired by High-Resolution...
Research Article| January 01, 2012 Planet-wide sand motion on Mars Nathan T. Bridges; Bridges 1Johns Hopkins University Applied Physics Laboratory, 11100 Johns Road, Laurel, Maryland 20723, USA Search for other works by this author on: GSW Google Scholar Mary C. Bourke; Bourke 2Planetary Science Institute, Tucson, Arizona 85719, Paul E. Geissler; Geissler 3U.S. Geological Survey, Flagstaff, 86001, Maria Banks; Banks 4Center Earth and Planetary Studies, Smithsonian Air Space Museum,...
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...
Abstract Jupiter’s icy moon, Europa, harbors a subsurface liquid water ocean; the prospect of this ocean being habitable motivates further exploration moon with upcoming NASA Europa Clipper mission. Key among mission goals is comprehensive assessment moon’s composition, which essential for assessing Europa’s habitability. Through powerful remote sensing and in situ investigations, will explore composition surface subsurface, its tenuous atmosphere, local space environment surrounding moon....
Fresh‐appearing gully deposits are found at tens of sites in the southern hemisphere Mars. These have latitudinal and azimuthal dependences similar to overall preferences southern‐hemisphere gullies, suggesting that most gullies can undergo such events. Definite changes seen ten sites, including two previously reported. include visible modification channels aprons. Those formation intervals constrained better than one Mars year tend winter exclude summer, seasonal activity. This activity is...
Research Article| November 01, 2010 Seasonality of present-day Martian dune-gully activity Serina Diniega; Diniega * 1Program in Applied Mathematics, The University Arizona, Tucson, Arizona 85721, USA *E-mail: serina@math.arizona.edu. Search for other works by this author on: GSW Google Scholar Shane Byrne; Byrne 2Lunar and Planetary Laboratory, Nathan T. Bridges; Bridges 3Applied Physics Johns Hopkins University, Laurel, Maryland 20723, Colin M. Dundas; Dundas Alfred S. McEwen Author...
Abstract A decade of high-resolution monitoring has revealed extensive activity in fresh Martian gullies. Flows within the gullies are diverse: they can be relatively light, neutral or dark, colourful bland, and range from superficial deposits to 10 m-scale topographic changes. We observed erosion transport material gullies, new terraces, freshly eroded channel segments, migrating sinuous curves, abandonment, lobate deposits. also early stages gully initiation, demonstrating that these...
Abstract Repeat, high-resolution imaging of dunes within the Martian north polar erg have shown that these dune slopes are very active, with alcoves forming along brink each Mars year. In some areas, a few hundred cubic metres downslope sand movement been observed, sometimes moving ‘backwards’. Based on morphological and activity-timing similarities features to southern gullies, identifying processes is likely relevance for understanding general evolution/modification gullies. To determine...
Many discoveries of active surface processes on Mars have been made due to the availability repeat high-resolution images from High Resolution Imaging Science Experiment (HiRISE) onboard Reconnaissance Orbiter. HiRISE stereo are used make digital terrain models (DTMs) and orthorectified (orthoimages). DTMs orthoimage time series crucial for advancing study such as recurring slope lineae, dune migration, gully activity, polar processes. We describe process making DTMs, series, DTM mosaics,...
<title>Abstract</title> Jupiter’s icy moon Europa is an ocean world which a prime candidate in our search for potential extraterrestrial habitability and life beyond Earth. Europa’s surface hosts many features proposed to originate from brine sources within its shell (Fagents, 2003), may represent the most accessible liquid water bodies Solar System (Lesage et al., 2022). An intriguing possible example asterisk-shaped ‘spider’ at center of Manannán crater, identified by Galileo mission...
Abstract Numerous types of activity in mid latitude martian gullies have been observed over the last decade. Some has constrained to occur coldest times year, suggesting that surficial frosts form seasonally and diurnally might play a key role this activity. Here we use thermal infrared data explore global, spatial temporal variation temperatures conducive CO 2 H O frost formation on Mars, assess their distribution relative gully landforms. detections are at all latitudes strongly correlated...
Abstract Many studies have investigated how channels and tubes form within basaltic flows. The partitioning of a broad lava flow into narrow regions enhanced velocity (which we refer to as preferred pathways) can affect emplacement, allow flows reach great lengths on Earth other planets. In this study, investigate the role that dynamic instability, driven by large changes in viscosity due small temperature, play formation propagation low‐viscosity pathways. We use fluid dynamics‐based model...
Fluvial channels in metamorphic core complexes are preferentially oriented parallel and perpendicular to the direction of tectonic extension. This pattern has been variably attributed such causes as tilting during extension, channel elongation by slip along range-bounding detachment fault, exploitation extension-related joint sets incision. In this paper we use field measurements, digital elevation model analyses, numerical modeling test hypotheses for structural control fluvial complexes,...