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Eccentricity is a measure of how an orbit deviates from circular. A perfectly circular orbit has an eccentricity of zero; higher numbers indicate more elliptical ... Planet Orbital Eccentricity Perihelion; (Point in Orbit Closest to Sun) measured in AU's Aphelion; (Point in Orbit Farthest from Sun) measured in AU's...
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www.enchantedlearning.com/subjects/astronomy/glossary/E...
www.enchantedlearning.com/subjects/astronomy/glossary/Eccentricity.shtml
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The eccentricity of Earth's orbit is very small, so Earth's orbit is nearly circular. Earth's orbital eccentricity is less than 0.02. The orbit of Pluto is the most eccentric of any planet in our Solar System.
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www.windows.ucar.edu/tour/link=/physical_science/physic...
www.windows.ucar.edu/tour/link=/physical_science/physics/mechanics/orbit/eccentricity.html
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Backward Stop Forward; ... Simulated view through a telescope of Mars from Earth; ... The Orbit of Mars...
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www.windows.ucar.edu/tour/link=/mars/mars_orbit.html
www.windows.ucar.edu/tour/link=/mars/mars_orbit.html
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At the 100,000-year period, atmospheric carbon dioxide, Vostok air temperature, and deep-water temperature are in phase with orbital eccentricity, whereas ice volume lags these three variables. Hence, the 100,000-year cycle does not arise from ice sheet dynamics;
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www.sciencemag.org/cgi/content/abstract/289/5486/1897
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Evidence from power spectra of deep-sea oxygen isotope time series suggests that the climate system of Earth responds nonlinearly to astronomical forcing by frequency modulating eccentricity-related variations in insolation.
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www.sciencemag.org/cgi/content/abstract/285/5427/564
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Fix Home Page | Fix 2/e Home Page | Ask the Author Discussion Group | Web Resources ... Begin a search ... legal policies and info...
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www.mhhe.com/physsci/astronomy/fix/student/chapter11/11...
www.mhhe.com/physsci/astronomy/fix/student/chapter11/11f24.html
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Nature 197, 1239 - 1240 (30 March 1963); doi:10.1038/1971239a ... Principal and Vice-Chancellor, University of Edinburgh; ... Appleton, E. V. , and Lyon, A. J. , Physics of the Ionosphere, 20 (Physical Society, London, 1955).
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www.nature.com/nature/journal/v197/n4874/abs/1971239a0....
www.nature.com/nature/journal/v197/n4874/abs/1971239a0.html
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Nature 240, 299 - 300 (01 December 1972); doi:10.1038/240299a ... Belfer Graduate School of Science, Yeshiva University, New York, New York, and NASA Goddard Institute for Space Studies, New York, New York; ... A NUMBER of mechanisms for the formation of the Moon have been suggested; fission of the Earth, precipitation in a...
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www.nature.com/nature/journal/v240/n5379/abs/240299a0.h...
www.nature.com/nature/journal/v240/n5379/abs/240299a0.html
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New low-eccentricity initial data are obtained by adjusting the orbital frequency and radial velocities to minimize the orbital eccentricity, and the resulting (~5 orbit) evolutions are compared with those of quasi-circular initial data.
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www.iop.org/EJ/abstract/0264-9381/24/12/S06
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