Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 20 of 46 for “"Moons"”.
-
Modeling Non-Rotational Ocean Circulation and Heat Distribution in Icy Moons
Subsurface oceans beneath the ice shells of icy moons like Europa and Enceladus are considered promising environments for extraterrestrial life. Their long-term habitability depends on internal heating and efficient vertical heat transport to maintain liquid water beneath the surface. This study …
-
Deformation of icy moons induced by heat flux variations from the ocean
Title: Deformation of icy moons induced by heat flux variations from the ocean Author: Martin Kihoulou Department: Department of Geophysics Laboratoire de Planétologie et Géosciences Supervisor: Prof. RNDr. Ondřej Čadek, CSc., Department of Geophysics Dr. Gaël Choblet, Laboratoire de Planétologie …
-
The motion of a lunar satellite under the influence of the moons noncentral force field
For lunar satellites within a few hundred miles of the lunar surface the primary cause of disturbance from pure Keplerian motion is the disturbing force due to the moon's noncentral gravitational field which, unlike the earth's field, is unsymmetrical and rotating. This thesis presents a …
-
A capture model for irregular moons based on a restricted 2+2 body problem and its statistical analysis
La presencia de pequeñas lunas que orbitan alrededor de los planetas gigantes constituye un problema de interés, dentro de la dinámica del sistema solar. Se trata de objetos de reducido tamaño que se mueven en órbitas bastante alejadas del planeta, con excentricidad moderada o alta y muy inclinadas …
-
Materials and Surface Processes at Gale Crater and the Moons of Mars Derived from High Spatial and Spectral Resolution Orbital Datasets
… the composition and geologic histories of Mars' moons, Phobos and Deimos, and Mt. Sharp, the destination for the Curiosity Mars rover. A final chapter focuses on Curiosity data and terrestrial analog studies to supplement orbital predictions about Mt. Sharp.</p><p>Disk-resolved hyperspectral …
-
Some Excursions Into Saturn's Faint Rings
… of Enceladus are considered. The other nearby moons of Saturn are included, though our results show that they have negligible effect over the ~ 200-yr integration. We follow the orbits of particles ejected near Enceladus' southern pole with speeds ranging between ~ 0.8 to 2 times the nominal …
-
Characterization of crater morphometry on the Moon and Mercury from altimetry observations
… processes, on the Moon and Mercury. The Moons transition diameter is near 16 km, in line with previous studies, while Mercurys is near 8 km, 2 km smaller than previously determined. The onset of gravity-dominated mechanisms scales inversely with gravity, which explains why Mercurys …
-
Relationality and Opacity: Approaching Trans in Cinema
… Rainer Werner Fassbinder’s In a Year of 13 Moons. I put 13 Moons in conversation with a series of Christer Strömholm’s photographs and Sébastien Lifshitz’s film Bambi. The transfeminine desires and intimacies documented in these artworks offer a fresh perspective on the forms of negativity …
-
The Influence of Curvature on Mantle Convection featuring a Temperature-dependent Viscosity
… mantles or ice layers of terrestrial planets and moons is characterized by a strongly temperature-dependent viscosity. Mantle convection regime is first examined in 2D and 3D spherical geometry with varying mantle curvature (core-to-surface radii-ratio, f) and constant heating conditions and …
-
Deformation and its surface expression in stressed planetary materials
… materials relevant to the cores of icy moons, finding that microstructural brittle deformation, and resultant energy release, occurs even at very small differential stresses. Acoustic emissions associated with this brittle deformation are also more energetic at lower confining pressures, …
-
The effect of bombardment of small bodies on the evolution of atmospheres of terrestrial bodies
… on the evolution of atmospheres on planets and moons. I first provide an introduction to the processes relevant to the formation and evolution of terrestrial planets and their atmospheres in Chapter 1, with a focus on the current state of research on the role impacts have played in shaping …
-
The Asteroid Miners: Space Mining and Resource Making in the Commercial Space Era
… objects, such as asteroids, comets, meteors, moons and planets, become subjects of commercial interest rather than simply scientific interest? Using ethnographic and archival methods, this dissertation explores the rise and fall of the space mining industry. It makes contributions to three …
-
Nuclear electric propulsion : assessing the design of Project Prometheus.
… an expedition to characterize the Jovian moons of Jupiter. Several requirements were estimated for the electric propulsion system to allow this mission to happen under the budget and technological constraints of the time. Although the mission was terminated early in 2005, many of the …
-
Searching for life where the sun don't shine : explorations to the seafloors of Earth and Europa
… similar hydrothermal vents on other planets or moons. One of the most promising places to search is the suspected sub-ice ocean on Jupiter's moon, Europa. This is the story of humankind's efforts to understand the origins of life by looking for it in extreme environments where life thrives …
-
The Formation and Evolution of Habitable Worlds
… modeling the atmospheric escape of planets and moons around Sun-like stars. We show that rocky planets are unlikely to exist with radii larger than ~1.8 Earth radii and the smallest habitable planets and habitable zone icy moons may be similar to, or greater in size than Ganymede. However, size …
-
A House on Saint Croix
… earths’ orbit around the sun takes 365 days. The moons’ orbit about the earth take 30 days. The earths’ revolution about its own axis takes 24 hours. The sun rises in the east and sets in the west. This is how man begins to define his portion of the universe, to distinguish limits. There is much …
-
Analytical methods for gravity-assist tour design
… tours with multiple flybys of those planets’ moons. Recent work has also shown applicability to new missions concepts such as NASA’s Asteroid Redirect Mission.</p> <p>This work is based in the theory of patched conics. This document applies rigor to the concept of pumping (i.e. using gravity …
-
Microbial communities, activities, and metabolisms in Earth’s subseafloor and analog oceanic environments
… the chemistry of the ocean on one of Saturn’s moons, Enceladus, and evaluates the genomic and physiological characteristics of microbial enrichments and isolates that may be relevant for survival in such extraterrestrial ocean environments. Chapter 6 characterizes six novel Marinobacter …
-
Automated planetary satellite tour planning with a novel low-thrust direct transcription method
… the preliminary design phase of the Jupiter Icy Moons Orbiter (JIMO) reference trajectory. The results of this analysis are presented and compared with the high-fidelity version of the JIMO reference trajectory generated using the software package Mystic.
-
Precise orbit determination of the Mars Odyssey spacecraft and geodetic inversion for the Martian gravity field
… bodies in the Solar System, plus the Martian moons. The inputs of the orbit determination program are the radio signals (Doppler and range), the angular momentum desaturations t.inings, the attitude (of the main bus of course, but also of the high-gain antenna and the solar panels), and a …
Page 1 of 3