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Progess toward their detection. Gravitational Waves and Observatories. Jonathan Burns, SAO Student No. 1610473. HET605 Project submission, 12 June 2004. There are moments in the history of the Universe when gravitational energy comparable to the rest-mass of a star is liberated as vibrations in spacetime. The geometry around us is minutely agitated by the total of these gravitational collapse and other relativistic events throughout our past lightcone. Generation of gravitational waves. But where there a...
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SAO Student No. 1610473. 19 November, 2004. At various times in the last twenty years, there have been science news articles on string theory, often breathlessly titled "Is this the final theory? Or similar. The articles usually. On string theory being the first mathematically well-founded quantum theory of gravity. However, they also admitted that. 1) the particles defined in string theory models, although having some of the. This review is intended to introduce the major concepts of string theory:.
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The Mystery of the Hidden Galaxies. Ultraluminous Infrared Galaxies and the AGN-Starburst Debate. Project submission for HET616. Jonathan Burns, SAO Student No. 1610473. 18 November, 2005. 1 Active Galaxies and Starbursts. With increasing resolution more radio galaxies were discovered where the emissions came from one or two of these lobes, at the ends of straight jets just as Curtis had seen. The theory was adopted of synchrotron emission from particle jets with enormous energy; where they finally s...
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A Three-Body Problem Simulation. This project investigates the conditions for a planet to capture a satellite of comparable mass. Where U is the potential energy of the system, and T the kinetic energy, with total energy E:. Our project is intended to simulate this scenario. In particular, our aim was to explore the parameter space for the circular three-body problem, and try to find critical boundaries between configurations where capture is possible, or not. Accordingly we set out to write a simulation...
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And their orbital effects in the Solar System. Essay Submission for HET602. Student No. 1610473. 5 April, 2003. This is a review of the mechanics of tidal force and its orbital effects in the Solar System. Tidal force is the effect of a non-uniform gravitational field on an extensive body. 2 Tidal effects in a central field. The attraction of the primary however is not uniform but varies in magnitude and direction. This shows itself in three ways:. Equipotential contours , for satellite mass 1/10 of the ...
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A Quest for Quasars. Seyfert 1 and 2 galaxies and the Unified Model of AGN. Seyfert 1 and 2 galaxies and the Unified Model of AGN. Essay submission for HET604. The Active Galaxy Bestiary. William C. Keel [5]. But this has proven no straightforward task. Multiple distance scales are involved, from galactic distances, through the scale of active galactic nuclei, to the inferred scale of central objects and their accretion disks. Luminosities vary a thousandfold between near Seyferts to early QSOs, ...AGNs ...
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Report from Era D. The death of the Sun and the rescue of the Earth. Report from Era D: 4.9 Billion AD. It's ten hours past noon, six before sunset. I'm overlooking an ancient seafloor, now a white expanse of salt and sand. Despite the albedo and high latitude, the temperature is 362 Kelvin. The mean temperature across Earth's day side is just above the boiling point of water. Over the planet it is 350, about the Venusian temperature at 50 km altitude in our time. [Note 1]. The Moon and Stars. Lunar tida...
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Extraterrestrial civilizations: ontology, opportunity, observability. Project Submission for HET608. Student No. 1610473. Deduction is only as valid as the observations it is based on. We have a general cosmological knowledge, but when it comes to specifics we can only reckon likelihood by extrapolating our own case. We can gauge our own opportunities given the laws of physics, but this does not allow us to deduce that alien species exist, or have taken the same opportunities if they did. The plan of thi...
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The Mystery of the Hidden Galaxies. String Theory: an overview. A Quest for Quasars. The Death of the Sun. Fluid 960 Grid System. Fluid 960 Grid System, created by Stephen Bau. Based on the 960 Grid System. Released under the GPL.
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