Results 21 to 30 of about 123,895 (209)

Dry Downhill Particle Motion on Mars

The Planetary Science Journal
We recently flew a new setup on parabolic flights for the first time to study particle motion on Martian slopes under Martian gravity. Here, we describe the initial experiments. We used dust/sand beds at varying ambient pressure of a few hundred pascals.
Tetyana Bila, Gerhard Wurm, Kai Stuers, Kolja Joeris, Jens Teiser   +4 more
doaj   +1 more source

Potential Subsurface Lava Tube Skylight on the Western Flank of Elysium Mons, Mars

The Astronomical Journal
The western flank of Elysium Mons, Mars, hosts a potential cave candidate (PCC) associated with a partially collapsed pit chain, previously identified in the Mars Cave Catalog.
Ravi Sharma, Chunyu Ding, Yan Su, Zhonghan Lei, Changzhi Jiang, Jiangwan Xu, YuXiao Zhi, Zihang Liang, Jiawei Li, Xiaohang Qiu, Haoyu Chen, S. N. A. Jaaffrey, (AAS Journals Data Editors)   +12 more
doaj   +1 more source

Transiting Disintegrating Planetary Debris around WD 1145+017

, 2018
More than a decade after astronomers realized that disrupted planetary material likely pollutes the surfaces of many white dwarf stars, the discovery of transiting debris orbiting the white dwarf WD 1145+017 has opened the door to new explorations of ...
A. Bonsor, Andrew Vanderburg, B Croll, B Zuckerman, B Zuckerman, B. T. Gänsicke, B. T. Gänsicke, B. T. Gänsicke, B. Zuckerman, BJR Davidsson, BL Gary, C Berg, CD Murray, CD Murray, Christopher J. Manser, D. Koester, Daniel Perez-Becker, Dimitri Veras, Dimitri Veras, Dimitri Veras, Dimitri Veras, Dimitri Veras, Dimitri Veras, E. E. Becklin, G Fontaine, G. Zhou, J Farihi, J. Farihi, J. H. Debes, John H. Debes, John H. Debes, KA Holsapple, M. C. Wyatt, M. Del Santo, M. Jura, M. Jura, Matthew J. Payne, Pol Gurri, R Hyodo, R. Alonso, S Friedrich, S Rappaport, S Rappaport, S Redfield, S. Rappaport, S. Xu, S. Xu (许偲艺), Sara D. Barber, Scott J. Kenyon, Scott J. Kenyon, SJ Kenyon   +50 more
core   +1 more source

The Impact of Hot Jupiters on the Spin-down of their Host Stars [PDF]

, 2010
We present a numerical Magnetohydrodynamic (MHD) study of the dependence of stellar mass and angular momentum- loss rates on the orbital distance to close-in giant planets.
Cohen, Cohen, Cohen, Hartman, Kashyap, Mardling, Mayor, Shkolnik, Shkolnik, Shkolnik, Shkolnik, Sánchez-Lavega   +11 more
core   +1 more source

Observed Changes in Mars Soil Thermophysical Properties Due to Rover Wheel Interactions: MER Mini-TES Observations and Applications to Upcoming Lunar Rover Exploration

The Planetary Science Journal
The Mars Exploration Rovers (MER) Spirit and Opportunity each carried a thermal infrared (IR) instrument called the Miniature Thermal Emission Spectrometer (Mini-TES) used to determine rock and soil composition and thermophysical properties. In this work,
Benjamin D. Byron, Kerri L. Donaldson Hanna, Addie Dove, Steve W. Ruff, Jean-Pierre Willams, Margaret Landis, Paul O. Hayne, Kristen A. Bennett, Jessica Sunshine, Prateek Tripathi   +9 more
doaj   +1 more source

Surface Heating Steers Planetary-Scale Ocean Circulation

Journal of Physical Oceanography, 2023
Abstract Gyres are central features of large-scale ocean circulation and are involved in transporting tracers such as heat, nutrients, and carbon dioxide within and across ocean basins. Traditionally, the gyre circulation is thought to be driven by surface winds and quantified via Sverdrup balance, but it has been proposed that surface buoyancy fluxes ...
Bhagtani, Dhruv, Hogg, Andrew McColl, Holmes, Ryan Mahony, Constantinou, Navid C.   +3 more
openaire   +2 more sources

Semi-implicit Solver for the Heat Equation with Stefan–Boltzmann Law Boundary Condition

The Planetary Science Journal
The surface energy balance on an atmosphereless body consists of solar irradiance, subsurface heat conduction, and thermal radiation to space by the Stefan–Boltzmann law.
Norbert Schörghofer, Samar Khatiwala
doaj   +1 more source

Planetary Atmosphere and Surfaces Chamber (PASC): A Platform to Address Various Challenges in Astrobiology

Challenges, 2014
The study of planetary environments of astrobiological interest has become a major challenge. Because of the obvious technical and economical limitations on in situ planetary exploration, laboratory simulations are one of the most feasible research ...
Eva Mateo-Marti
doaj   +1 more source

Updated Radiative Transfer Model for Titan in the Near-infrared Wavelength Range: Validation against Huygens Atmospheric and Surface Measurements and Application to the Cassini/VIMS Observations of the Dragonfly Landing Area

The Planetary Science Journal, 2023
We present an analysis of Titan data acquired by the Cassini Visual and Infrared Mapping Spectrometer (VIMS) at the landing site of the Dragonfly mission, using a new version of our radiative transfer model for Titan, with significant updates for the ...
M. Es-sayeh, S. Rodriguez, M. Coutelier, P. Rannou, B. Bézard, L. Maltagliati, T. Cornet, B. Grieger, E. Karkoschka, S. Le Mouélic, A. Le Gall, C. Neish, S. MacKenzie, A. Solomonidou, C. Sotin, A. Coustenis   +15 more
doaj   +1 more source

Combination ranging system and mapping radar [PDF]

, 1969
Transmitter, radiating at a right angle to the spacecraft trajectory and intersecting the surface at a shallow angle, yields accurate radar maps of lunar or planetary surfaces. Earth based station receives the signal reflected from the planetary surface.
Goldstein, R. M., Horttor, R. L.
core   +1 more source