Visible/near-infrared reflectance and mid-infrared emission spectroscopy are broadly used to detect the composition and physical properties of planetary surfaces. Qualitative identification and quantitative extraction of the mineralogical distribution, type, abundance, and physi…
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The Orson Welles Chaos is a linear feature located between the Orson Welles crater and Ganges Chasma in Xanthe Terra, Mars. Within the Chaos system there are two neighboring deposits of white sediment that are uniquely colored and horizontally layered in visible light imagery. G…
Mars’ polar layered deposits (PLD) are comprised of icy layers of varying dust-to-water ice volume mixing ratio (VMR) that are thought to record astronomically-forced climatic variation over Mars’ recent orbital history. Retracing the formation history of these layers by quantif…
This work describes the design, development and testing of a portable charge-coupled device detector system to be used for the simultaneous collection of X-ray diffraction and X-ray fluorescence data from powdered samples. The detector was designed for both terrestrial and extra…
“ Bilim Kurgu Sinemasında İktidar ve Teknoloji İlişkisi ” isimli bu tez çalışması, iktidar ve teknoloji arasında var olduğu düşünülen ilişkiyi ele almakta ve bu ilişkinin bilim kurgu sinemasındaki karşılığını filmlerdeki içerikler üzerinden analiz etmeyi amaçlamaktadır. Çalışmad…
Variable mixtures of CO 2 ice, H 2 O ice, and dust in volatile exposures at the south pole of Mars influence interactions with the atmosphere that drive their formation, evolution, and eventual preservation as long-term climate records. However, ice composition in the south pola…
Extreme ultraviolet and X-ray photons from the Sun generate a partially ionized region in the atmosphere of a planet called an ionosphere. Solar activity, including solar flares, coronal mass ejections, and changes in the ionizing irradiance affect planetary ionospheres on short…
Magmatism is a critical process throughout the geological history of Earth and Mars, and one of the few processes capable of producing significant changes in the Martian surface and subsurface past the Noachian. The interaction between mafic magmatism and host rock has the poten…
The topography and gravity measurements from missions to Venus and Mars are among a few data available to constrain models of the interior structure and dynamics of these planets. These measurements reveal various intriguing features whose origins have generated debates in the p…
Tempe Terra, Mars, has a complex history marked by volcanism and tectonism. Investigation results presented here build on previous work to better determine the volcanic history of the Tempe volcanic province by identifying and mapping previously undetected vents, characterizing …
Much of Mars' surface is mantled by bright dust, which masks the spectral features used to interpret the mineralogy of the underlying bedrock. Despite the wealth of near-infrared (NIR) and thermal infrared data returned from orbiting spacecraft in recent decades, the detailed be…
Impact craters are common geomorphological features on Mars. The density of craters is different among various regions. Higher crater density means older terrain. Craters can be divided into two types by the interior morphology: simple and complex. The cavity of Simple craters i…
Atmospheric dust, water vapor and ice, and minor gas species (argon, nitrogen) are known as tracers of the martian atmosphere because of their ability to track atmospheric circulation. Their abundance by mass in the martian atmosphere is negligible, with nitrogen being the large…
The results from this study show that during the middle Amazonian period (2 Ga), Arabia Terra did exhibit glacial and fluvial activity as predicted by the Global Circulation Model. Arabia Terra is the largest expanse of ancient terrain north of the Martian equator. Arabia Terra …
Two recent in situ Mars missions, the Phoenix Mars Lander and the Mars Exploration Rover Opportunity, have explored two quite different locations on the surface of Mars. The Phoenix lander investigated the polygonal terrain and associated soil and icy soil deposits of a high nor…
Leachate generation and management is recognized as one of the greatest problems associated with environmentally sound operation of landfills, as leachate can cause major pollution problems to surrounding soil, ground water, and surface waters. There are many landfills, especial…
The Arabia Terra province on Mars, centered at 25° E, 5° N and covering approximately 1 × 107 km2, contains some of the most heavily-cratered, low-lying terrain on Mars. The great number of craters indicates its significant age, > 3.5 billion years. During this time Arabia Terra…
Geologic and geomorphic analyses reveal the effects of fluvial processes within Tyrrhena Terra, Promethei Terra and Libya Montes, Mars. High-resolution Mars Orbiter Camera (MOC), Thermal Emission Imaging System (THEMIS) visible and thermal infrared wavelength images, Viking Orbi…
A chronology of the Syrtis Major Quadrangle on Mars has been devised using topographic, structural, gravimetric, and magnetic data along with recent narrow-angle images from the Mars Orbiter Camera. The dichotomy boundary and Arabia Terra are two of the major structural features…