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 20 of 289 for “"Solar system"”.
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Igneous processes of the early solar system
… to explore the igneous evolution of the early solar system. Chapters 1 and 2 detail the results of petrographic and experimental studies of a suite of primitive achondritic meteorites, the ureilites. The first chapter presents data that reveal correlations between mineral modal proportions and …
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Analysis of some solar system dynamics problems.
Thesis. 1976. Ph.D.--Massachusetts Institute of Technology. Dept. of Earth and Planetary Sciences.
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Magnetic fields in the early solar system
The first magnetic fields in the solar system were embedded in the ionized gas of the protoplanetary disk itself. Soon after, newly formed protoplanets may have harbored magnetic core dynamos. Paleomagnetic analysis of ancient samples permits direct constraints on these early solar system magnetic …
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Penetration of supernova radioactivities in the solar system
… by which supernova ejecta can penetrate the solar system, and in particular, directly deposit live radioactivities on Earth. This study is motivated by the discovery of live undersea 60Fe from an event 2.8 Myr ago. The 60Fe signal is consistent with a nearby supernova explosion - occuring …
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Organic chemistry and mineral interactions in the solar system
The objective of this project was to develop methods to detect meteoritic organic compounds in situ, and to detelmine whether any associations exist between specific classes of compound and co-located minerals, thus indicating a possible common origin. Carbonaceous chondrites, (which comprise a …
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Noble gases: a record of the early solar system
"Analyses of the noble gases in samples of iron meteorites are presented which indicate the following: 1. The inclusions of iron meteorites contain noble gases with a wide range of isotopic compositions. 2. The noble gas concentration and isotopic anomalies arc often grossly inhomogeneously …
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Investigation of Interstellar Object Flux Through the Solar System
… the number of interstellar objects through the solar system is a key factor in creating engineering projects that will allow for ISOs to be studied more closely, revealing important information about planetary formation and star system history. Thus, a current observational upper limit of the …
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Tidal heating and tidal evolution in the solar system
… and tidal evolution in the Saturnian satellite system. We constrain the equilibrium heating of Enceladus to be less than 1.1(18000/QS) GW, where QS is the tidal quality factor of Saturn. The constraint on the heat flow is calculated from simple conservation of energy and angular momentum …
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Evolution of orbit-orbit resonances in the solar system.
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Earth and Planetary Science, 1972.
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An Approach to Modelling Ice Deposition Across the Solar System
… I have augmented JPL’s Ice-sheet and Sea-level System Model (ISSM) to support multi-unit ice masses, temperature-dependent material properties (beyond the already temperature-dependent rheology), and Martian environmental boundary conditions. This new codebase, the Multi-unit Ice Deposits …
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Following Carbon's Evolutionary Path: From Nucleosynthesis to the Solar System
Studies of carbon's evolutionary path have been conducted via millimeter and submillimeter observations of circumstellar envelopes (CSEs), planetary nebulae (PNe), molecular clouds and comets. The 12C/13C isotope ratio was measured in Galactic molecular clouds using the CN isotopologs. A gradient …
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Angular momentum flux in the formation of the solar system
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Meteorology, 1964.
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Planet formation and evolution in our Solar System and beyond
… has revealed a remarkable diversity of planetary system architectures, including entire classes of planets for which there is no solar system analog. In particular, the Kepler mission has shown that planets intermediate in size between Earth and Neptune with orbital periods less than 100 days are …
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Solar System: An Interactive Learning Supplement for Sixth Grade Science Students
The file named "ClairBrett.pdf" is the primary dissertation file. The file named "ClairBrett_SpaceGame.zip" is a zipped file folder that contains two (2) executable files to view the interactive learning application described in the abstract.
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Astronomical studies of solar system bodies 2060 Chiron and 1 Ceres
In this thesis two separate projects are investigated, a stellar occultation by 2060 Chiron and rotationally resolved spectra of 1 Ceres. On 29 November 2011 UT, 2060 Chiron occulted a 14-mag star; data were successfully obtained at the 3-m IRTF on Mauna Kea and 2-m Faulkes North Telescope at …
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The role of vortices in the formation of the solar system
… enhance the coagulation of dust particles in the solar nebula. An inviscid, barotropic, two-dimensional form of the vorticity equation is derived to study the gas flow. A pseudospectral numerical model uses this equation to calculate the evolution of the vorticity field. The calculations show that …
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Decoding the history of the early solar system using comet volatile compositions
<p>"Understanding the evolution of the solar system, as well as its current volatile content, requires knowledge of the initial conditions present in the solar nebula. As some of the first objects to accrete in the solar nebula, cometary nuclei are among the most primitive remnants of solar system …
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Identifying and correcting misconceptions about the solar system through a constructivist teaching approach
… and construct their knowledge about the solar system. Overall, the results from the data collected indicated the constructivist approach to education is effective in identifying and correcting naive conceptions and misconceptions.
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