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.
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Showing 1 to 19 of 19 for “"Small bodies"”.
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The Effect of Dust in Small Bodies: A Sample of Jupiter Family Comets
There was an unprecedented opportunity to study the inner dust coma environment, where the dust and gas are not entirely decoupled, of Jupiter Family Comets 45P/Honda-Mrkos-Pajdusakov (45P/HMP) from Dec. 26, 2016 - Mar. 15, 2017, 41P/Tuttle-Giacobini-Kresak (41P/TGK) from Feb. 16, 2017 - May 23, …
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The effect of bombardment of small bodies on the evolution of atmospheres of terrestrial bodies
The atmospheres of bodies in the Solar system display a great degree of diversity in their mass and composition. Impacts onto these bodies by smaller objects, such as asteroids, comets and planetesimals left over after terrestrial planet formation are evidenced by crater observations, and are an …
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Modeling and Characterization of Structural, Thermophysical, and Dynamical Evolutions of Small Bodies in the Solar System
Explorations of small bodies in the solar system––such as asteroids and comets––offer unique opportunities to study the remnants of the early solar system. These small bodies often challenge our expectations, revealing surprising findings that raise questions about planetary formation, evolution, …
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The use of stellar occultations to study the figures and atmospheres of small bodies in the outer solar system
The methods of analyzing stellar occultations by small bodies in the outer solar system are discussed with examples from Triton, Pluto, and Charon. Simulations were performed characterizing the analysis of multi-chord occultations including: the effects of the direction of residual minimization in …
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Quick Evaluation of Small Body Gravitation
… from the gravitation of nearby celestial small bodies is the subject of this thesis. We present three methods that alleviate the computational burden of evaluating gravitational force near a small body: (i) adaptive polynomial interpolation, (ii) adaptive polynomial least squares …
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Do College Students Perceive Stigma the Same Way Experts Do? An Experimental Test of Lay Perceptions of Body-Size Stigma
… x 2 (Body Size of stigmatized person: large, small) posttest-only experiment. Participants’ self-esteem was not impacted after viewing stigmatizing messages directed at another person. This suggests that selfesteem is more stable than some researchers indicate (Wagner, Lüdtke, and Trautwein, …
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Mass ratios in stellar triple systems that admit horseshoe orbits
… that give rise to "horseshoe orbits" in the smallest body. Several configurations are tested according to the initial parameters of mass for each of three bodies and position and velocity for the smallest body. The masses are arranged hierarchically, so as to mimic systems like Sun- …
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Design, Fabrication, and Testing of a Proprioceptive Electroadhesion Pad for Space Applications
… analysis of cohesive forces in regolith at small bodies, such as asteroids or comets. Electrostatic finite element analysis was performed on various electroadhesion pad designs in order to compare field intensities. In order to obtain optimum surface adhesion, the use of Macro Fiber …
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Employing Magnetic Field Records at Key Moments in Planetary Evolution
… II) The initial melting on the first planetary bodies; and III) The early interior evolution of modern planets. I address Stage I through a paleomagnetic analysis of returned samples from asteroid Ryugu to determine the role of magnetic fields in stellar accretion in the distal solar system …
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Igneous processes of the early solar system
… and pressures that would be expected on small bodies in the early solar system (up to 1300⁰C and 2.5 to 15 IPa) heated by decay of short lived isotopes. The results are then applied to ureilite petrogenesis and assembly of larger planetary bodies. The final chapter is an experimental …
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Design and modeling of kinetic impact missions for deflecting near-earth asteroids
The solar system is full of small bodies such as asteroids and comets that are thought to be remnants of early planetary formation. As of June 2025, there are more than 1.4 million known small bodies in the solar system, more than 4,000 of which are classified as comets. These objects routinely …
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Design of low-thrust missions to asteroids with analysis of the missed-thrust problem
<p>Small bodies in the Solar System, such as asteroids and dwarf planets, are ideal targets for electric propulsion missions because of the high delta-V required to rendezvous with these targets. We study trajectories to the asteroid belt, including a human mission to Ceres and a sample return …
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Nonlinear dynamics of three-dimensional solitary waves
… to the wave drag associated with the motion of small bodies on a free surface.
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The origin and evolution of warm exozodiacal dust
Many stars show excess mid-infrared emission which is attributed to warm dust in the habitable zone of the star, known as exozodiacal dust, or exozodis for short. Such dust will be a source of noise and confusion when attempting to detect and characterise Earth-like planets. Therefore, an …
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The effects of stochastic forces on the evolution of planetary systems and Saturn's rings
… further application, the stochastic migration of small bodies in Saturn’s rings is studied. Analytic predictions of collisional and gravitational interactions of a moonlet with ring particles are compared to realistic three dimensional collisional N-body simulations with up to a million particles. …
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The relationship between Centaur activity and ring formation
Introduction: Centaurs are small bodies whose orbits lie between those of Jupiter and Neptune (Gehrels, 1999). They are thought to be transition objects that originate in the Kuiper belt and occupy the cis-Neptunian region before potentially becoming Jupiter-family or other short-period comets …
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Stellar occultations by bodies in the outer solar system at the South African Astronomical Observatory
… of the Solar System is harbored by primitive bodies called trans-Neptunian objects (TNOs). Their preserved state is due to these bodies having orbits at and beyond that of Neptune, as this specific area is considered to be the least thermally modified in the Solar System and could contain a …
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Deep-Space Exploration Enabled by CubeSats with Staged Electrospray Propulsion
… belt contains unique scientific value as the small bodies in this region are remnants of solar system formation. Because there are over a million known bodies spread across dozens of types, however, it is infeasible to explore a representative sample with large missions. To solve this, swarm …
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Metamorphic evolution of ultrahigh-temperature granulite facies and upper amphibolite facies rocks of the Epupa Complex, NW Namibia
… succession, which was intruded by small bodies of S-type granitoids and by andesitic dykes. All these rocks underwent UHT granulite facies metamorphism during the early Mesoproterozoic (1520-1447 Ma). The volcano-sedimentary succession is dominated by interlayered basaltic …