Open Access. Powered by Scholars. Published by Universities.®

The Sun and the Solar System Commons

Open Access. Powered by Scholars. Published by Universities.®

273 Full-Text Articles 508 Authors 19,696 Downloads 64 Institutions

All Articles in The Sun and the Solar System

Faceted Search

273 full-text articles. Page 1 of 11.

Methanogens, Plausible Extraterrestrial Life Forms On Mars, And Their Tolerance To Increasing Concentrations Of Illite Clay, Chandler Kern 2018 University of Arkansas, Fayetteville

Methanogens, Plausible Extraterrestrial Life Forms On Mars, And Their Tolerance To Increasing Concentrations Of Illite Clay, Chandler Kern

Biological Sciences Undergraduate Honors Theses

Methanogens, some of Earth’s most primitive prokaryotic organisms, are candidates for possible life forms capable of inhabiting Mars. Specifically, four different species (Methanobacterium formicicum, Methanococcus maripaludis, Methanosarcina barkeri, Methanothermobacter wolfeii) were analyzed for their tolerance to the presence of illite clay. Illite is a crystalline mineral that has been identified from regions of Mars’s surface. Results indicated that all four species grew with some success in the illite at different concentrations. This experimentation with methanogens’ abilities to survive and reproduce in the presence of illite allows for a more accurate understanding of the potential capability of microbial growth ...


Reason In Motion, Luke Francis 2018 Embry-Riddle Aeronautical University

Reason In Motion, Luke Francis

Student Works

This essay will explain the historical models of the solar system, which was the known universe for most of human history. There is far more to each model than simply positioning different celestial bodies at the center of the system, and the stories of the astronomers who derived the controversial theories are not discussed often enough. The creation of these theories is part of a much broader revolution in scientific thought and marked the start of a series of observational discoveries that would change the the philosophy of science for centuries to come.


Gravity's Light In The Shadow Of The Moon, Andri Gretarsson, Preston Jones, Douglas Singleton 2018 Embry-Riddle Aeronautical University

Gravity's Light In The Shadow Of The Moon, Andri Gretarsson, Preston Jones, Douglas Singleton

Publications

In this essay we look at the possibility of vacuum production of very low frequency electromagnetic radiation from a gravitational wave background (i.e. gravity's light). We also propose that this counterpart electromagnetic radiation should be detectable by a lunar orbiting satellite which is periodically occulted by the Moon (i.e., in the shadow of the Moon). For concreteness we consider the possibility of detection of both the gravitational wave and hypothesized electromagnetic radiation counterpart from the supernova core collapse of Betelgeuse


The Periglacial Landscape Of Mars: Insight Into The 'Decameter-Scale Rimmed Depressions' In Utopia Planitia, Arya Bina 2018 The University of Western Ontario

The Periglacial Landscape Of Mars: Insight Into The 'Decameter-Scale Rimmed Depressions' In Utopia Planitia, Arya Bina

Electronic Thesis and Dissertation Repository

Currently, Mars appears to be in a ‘frozen’ and ‘dry’ state, with the clear majority of the planet’s surface maintaining year-round sub-zero temperatures. However, the discovery of features consistent with landforms found in periglacial environments on Earth, suggests a climate history for Mars that may have involved freeze and thaw cycles. Such landforms include hummocky, polygonised, scalloped, and pitted terrains, as well as ice-rich deposits and gullies, along the mid- to high-latitude bands, typically with no lower than 20o N/S. The detection of near-surface and surface ice via the Phoenix lander, excavation of ice via recent impact cratering ...


Totality In Carbondale, Grant Haynes 2018 Western Michigan University

Totality In Carbondale, Grant Haynes

The Hilltop Review

August 21 was one of the high points of 2017. That day a total solar eclipse tracked over much of the continental U.S. An early morning train ride brought me to Carbondale Illinois, the location of the eclipses longest duration. As totality neared clouds obscured this amazing celestial wonder, but they soon parted, and I was able to get a few spectacular photos of the eclipse, this one with the clouds that almost ruined it, is my favorite.


The Proposed Origin Of Our Solar System With Planet Migration, Wayne R. Spencer 2018 Cedarville University

The Proposed Origin Of Our Solar System With Planet Migration, Wayne R. Spencer

The Proceedings of the International Conference on Creationism

Two new models to explain the origin and history of our solar system are reviewed from a creation perspective, the Grand Tack model and the Nice model. These new theories propose that the four outer planets formed closer to the Sun, as well as closer together, than today. Then their orbits underwent periods of migration. Theories developed in the research on extrasolar planet systems are today being applied to our own solar system. The new migration models are finding much support from the planetary science community. These new models are summarized and evaluated Biblically and scientifically. Rather than demonstrating how ...


Impact Melt Emplacement On Mercury, Jeffrey Daniels 2018 The University of Western Ontario

Impact Melt Emplacement On Mercury, Jeffrey Daniels

Electronic Thesis and Dissertation Repository

Impact cratering is an abrupt, spectacular process that occurs on any world with a solid surface. On Earth, these craters are easily eroded or destroyed through endogenic processes. The Moon and Mercury, however, lack a significant atmosphere, meaning craters on these worlds remain intact longer, geologically. In this thesis, remote-sensing techniques were used to investigate impact melt emplacement about Mercury’s fresh, complex craters. For complex lunar craters, impact melt is preferentially ejected from the lowest rim elevation, implying topographic control. On Venus, impact melt is preferentially ejected downrange from the impact site, implying impactor-direction control. Mercury, despite its heavily-cratered ...


Characterization Of Eight Potentially Hazardous Near Earth Asteroids: Rotation Period Analysis And Structure Modeling Via Light Curve Inversion Techniques, Stacy Jo Hicks 2018 Western Kentucky University

Characterization Of Eight Potentially Hazardous Near Earth Asteroids: Rotation Period Analysis And Structure Modeling Via Light Curve Inversion Techniques, Stacy Jo Hicks

Masters Theses & Specialist Projects

The term “homeland security”, seems to have become synonymous with terrorism in the minds of the general public. However, there are other threats to the security of the United States homeland that can be just as, if not more, devastating than terrorism. Included among these other threats is the potential of an asteroid collision with Earth. Historically, asteroid impact events have been responsible for the devastation of our planet and many of the mass extinction events encountered throughout the geologic record. Knowledge of physical parameters such as structure and rotational dynamics of the asteroid are critical parameters in developing interception ...


The Automation Of Analysis Procedures For The Citizen Cate Experiment Eclipse Data, Logan Jensen, Michael Pierce 2018 University of Wyoming

The Automation Of Analysis Procedures For The Citizen Cate Experiment Eclipse Data, Logan Jensen, Michael Pierce

Honors Theses AY 17/18

The Citizen Continental-America Telescopic Eclipse Experiment deployed 68 volunteer-operated telescope and camera systems across the United States to collect continuous data of the August 2017 solar eclipse. For any one location the eclipse lasted 2.5 minutes, but in total the nationwide CATE network collected data on the full 93 minutes of eclipse across America. The wealth of data collected contains more than 110,000 calibration and eclipse images and takes up 1.5 terabytes of memory. To become scientifically applicable, all these images needed to be corrected for systematic errors caused by the equipment and for human error. The ...


Education, Support, And Results For Wyoming Participants In The Citizen Cate (Continental-America Telescopic Eclipse) Experiment, Gabriel Miller 2018 University of Wyoming

Education, Support, And Results For Wyoming Participants In The Citizen Cate (Continental-America Telescopic Eclipse) Experiment, Gabriel Miller

Honors Theses AY 17/18

Throughout the spring and summer of 2017, the Citizen CATE (Continental- America Telescopic Eclipse) Experiment was active in Wyoming and across the contiguous United States, with the goal of achieving an unbroken line of citizen- operated telescopes and cameras along the path of totality for the August eclipse. Eleven sites were active in Wyoming, composed of teachers, students, amateur and professional astronomers, and interested members of the community. In two large educational sessions, as well as several localized practice events, these groups were trained to use the telescopes and cameras provided for them. Working closely with the National Solar Observatory ...


An Investigation Into The Suitability Of Sulfate-Reducing Bacteria As Models For Martian Forward Contamination, Maxwell M. W. Silver 2018 University of Arkansas, Fayetteville

An Investigation Into The Suitability Of Sulfate-Reducing Bacteria As Models For Martian Forward Contamination, Maxwell M. W. Silver

Theses and Dissertations

The NASA Planetary Protection policy requires interplanetary space missions do not compromise the target body for a current or future scientific investigation and do not pose an unacceptable risk to Earth, including biologic materials. Robotic missions to Mars pose a risk to planetary protection in the forms of forward and reverse contamination. To reduce these risks, a firm understanding of microbial response to Mars conditions is required. Sulfate-reducing bacteria are prime candidates for potential forward contamination on Mars. Understanding the potential for forward-contamination of sulfate-reducers on Mars calls for the characterization of sulfate-reducers under Mars atmosphere, temperature, and sulfate-brines. This ...


Lunar Ice Cube: Development Of A Numerical Model For Attitude Control, Alexander Roberts, Benjamin Malphrus, Kevin Brown 2018 Morehead State University

Lunar Ice Cube: Development Of A Numerical Model For Attitude Control, Alexander Roberts, Benjamin Malphrus, Kevin Brown

Celebration of Student Scholarship Posters Archive

No abstract provided.


Msu And Citizen Cate: A High Definition Look At The Sun’S Inner Corona During The 2017 Solar Eclipse Over Hopkinsville, Kentucky., Jessie Anderson, Ethan Caudill 2018 Morehead State University

Msu And Citizen Cate: A High Definition Look At The Sun’S Inner Corona During The 2017 Solar Eclipse Over Hopkinsville, Kentucky., Jessie Anderson, Ethan Caudill

Celebration of Student Scholarship Posters Archive

No abstract provided.


Experimental Investigation Of A New Spiral Wingtip, Naseeb Ahmed Siddiqui, Mohamed Aldeeb, Waqar Asrar, Erwin Sulaeman 2018 International Islamic University - Malaysia

Experimental Investigation Of A New Spiral Wingtip, Naseeb Ahmed Siddiqui, Mohamed Aldeeb, Waqar Asrar, Erwin Sulaeman

International Journal of Aviation, Aeronautics, and Aerospace

Experiments on the relative merits and demerits of slotted wingtips mimicking a bird’s primary feathers have been performed. The real emargination length of feather tips, their flexibility and curved shapes during cruise are considered in the present study. The experiments were performed at a Reynolds number of 3.7 x 105 on a symmetric flat plate half wing of aspect ratio 3. Lift, drag and pitching moments were measured using a six component aerodynamic balance. Four different shapes inspired by bird primary feathers have been analysed. The rigid curved tip performed the best increasing the L/D ratio ...


The Earth's Magnetosphere, Soren Ormseth 2018 University of Montana

The Earth's Magnetosphere, Soren Ormseth

Undergraduate Theses and Professional Papers

The Interstellar Boundary Explorer (IBEX) is an Earth orbiting satellite launched in 2008; designed to map the boundary of our Solar System. In this presentation, we focus on how data collected by the IBEX-Hi sensor can be used to map the distribution of hot ions within the Earth's magnetosphere. As opposed to other satellites, IBEX images the magnetosphere from afar rather than by going through it. An improvement on the previous imaging techniques was developed, and we compare the new results to the old.


Solar Alignment And The Irish Passage Tomb Tradition, Frank Prendergast 2018 Dublin Institute of Technology

Solar Alignment And The Irish Passage Tomb Tradition, Frank Prendergast

Book/Book Chapter

A succinct and very useful, illustrated, explanatory guide to the phenomenon of solar alignment in the irish Passage Tomb tradition. Includes a listing of where to visit the 15 known astronomically aligned passage tombs in the 32 counties.

Written by Dr Frank Prendergast who is now Emeritus at the Dublin Institute of Technology, where he researches Irish prehistoric monuments and their landscapes from a cultural astronomy perspective. His current interests and publications are on the meaning of the dark sky in the prehistoric past and on the conservation of archaeological landscapes from light pollution.

Heritage Guides are included free with ...


The Relationship Between The September 2017 Space Weather Event And The Crustal Magnetic Field Of Mars, Camella-Rosa C. Nasr 2018 CU Boulder, LASP

The Relationship Between The September 2017 Space Weather Event And The Crustal Magnetic Field Of Mars, Camella-Rosa C. Nasr

Undergraduate Honors Theses

In September 2017, the Imaging UltraViolet Spectrograph (IUVS) on the Mars Atmosphere and Volatile Evolution Mission (MAVEN) spacecraft detected a global aurora event that took place as a consequence of an unexpectedly strong blast from the sun. The most widespread of these detected auroras is diffuse aurora, which was confirmed to be global aurora. This global aurora was seen at lower altitudes and has been discovered to be directly related to the detection of highly energetic solar outbursts. These outbursts are typically energetic electrons precipitating downwards (Schneider et al., 2015). I was interested in learning more about the aurora that ...


Strategies For Detecting Biological Molecules On Titan, Catherine Neish, Ralph Lorenz, Elizabeth Turtle, Jason Barnes, Melissa Trainer, Bryan Stiles, Randolph Kirk, Charles Hibbitts, Michael Malaska 2018 The Johns Hopkins University Applied Physics Laboratory

Strategies For Detecting Biological Molecules On Titan, Catherine Neish, Ralph Lorenz, Elizabeth Turtle, Jason Barnes, Melissa Trainer, Bryan Stiles, Randolph Kirk, Charles Hibbitts, Michael Malaska

Earth Sciences Publications

Saturn’s moon Titan has all the ingredients needed to produce “life as we know it”. When exposed to liquid water, organic molecules analogous to those found on Titan produce a range of biomolecules such as amino acids. Titan thus provides a natural laboratory for studying the products of prebiotic chemistry. In this work, we examine the ideal locales to search for evidence of, or progression towards, life on Titan. We determine that the best sites to identify biological molecules are deposits of impact melt on the floors of large, fresh impact craters, specifically Sinlap, Selk, and Menrva craters. We ...


The Coincident Coherence Of Extreme Doppler Velocity Events With P-Mode Patches In The Solar Photosphere, Rachel Mcclure 2018 University of Colorado, Boulder

The Coincident Coherence Of Extreme Doppler Velocity Events With P-Mode Patches In The Solar Photosphere, Rachel Mcclure

Undergraduate Honors Theses

Observations of the solar photosphere show many spatially compact Doppler velocity events with short life spans and extreme values. In the IMaX spectropolarimetric inversion data of the first flight of the SUNRISE balloon in 2009 these striking flashes in the intergranule lanes and complementary outstanding values in the centers of granules have line of sight Doppler velocity values in excess of 4σ from the mean. We conclude that values outside 4σ are a result from the superposition of the granulation flows and the p-modes.

To determine how granulation and p-modes contribute to these outstanding Doppler events, I separate the two ...


The Influence Of Quiet Sun Magnetism On Solar Radiative Output, Courtney Leigh Peck 2018 University of Colorado at Boulder

The Influence Of Quiet Sun Magnetism On Solar Radiative Output, Courtney Leigh Peck

Physics Graduate Theses & Dissertations

Spectral solar irradiance (SSI), the radiant energy flux per wavelength of the Sun received at Earth, is an important driver of chemical reactions in the Earth's atmosphere. Accurate measurements of SSI are therefore necessary as an input for global climate models. SSI models and observations, however, disagree on the sign and magnitude of the variations. In this thesis, we analyze the contributions of the currently unresolved low magnetic flux `quiet sun' to SSI variations. Using measurements of the full solar disk, we demonstrate that the sign of the low magnetic flux contribution to SSI variations depends on the defined ...


Digital Commons powered by bepress