Milankovitch cycles - Wikipedia, the free encyclopedia
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Milankovitch Theory describes the collective effects of changes in the Earth's movements upon its climate, named after Serbian civil engineer and mathematician Milutin Milanković. Milanković mathemat...
en.wikipedia.org/wiki/Milankovitch_cycles
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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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In this lesson, students will analyze data from solar magnetogram images collected over 25 years at the National Solar Observatory Vacuum Telescope at Kitt Peak, AZ. Students use the data and graph constructed in the lesson "Aphelion and Perihelion Pt. 2" to determine the eccentricity of the earth's orbit.
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eo.nso.edu/dasl/Lessons/Aphelion/index3.htm
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The eccentricity of earth's orbit is 0.016710219. This is a measure of how elliptical the orbit is. Earth's orbit is not a perfect circle, but the eccentricity shows that it is not a very pronounced ellipse, either.
http://wiki.answers.com/Q/The_ecentricity_of_the_earth'...
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These small variations in Earth-Sun geometry change how much sunlight each hemisphere receives during the Earth’s year-long trek around the Sun, where in the orbit (the time of year) the seasons occur, ... The Earth’s orbit varies over tens and hundreds of thousands of years. Combined changes in eccentricity, obliquity,
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earthobservatory.nasa.gov/Study/Paleoclimatology_Eviden...
earthobservatory.nasa.gov/Study/Paleoclimatology_Evidence/
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CELESTIAL EQUATOR: The projection of the EARTH's equator on the CELESTIAL SPHERE. ... CELESTIAL POLES: Points of intersection by extension of the EARTH's axis to the CELESTIAL SPHERE.
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www.esse.ou.edu/glossary_ess.html
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The first of the three Milankovitch Cycles is the Earth's eccentricity. Eccentricity is, simply, the shape of the Earth's orbit around the Sun. This constantly fluctuating, orbital shape ranges between more and less elliptical (0 to 5% ellipticity) on a cycle of about 100,000 years.
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www.homepage.montana.edu/~geol445/hyperglac/time1/milan...
www.homepage.montana.edu/~geol445/hyperglac/time1/milankov.htm
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1 Centre for Glaciology, Institute of Geography and Earth Sciences, University of Wales, Aberystwyth SY23 3DB, UK; 2 Bristol Glaciology Centre, School of Geographical Sciences, University of Bristol, Bristol BS8 1SS, UK; ... Eccentricity controlled ice-sheet growth is assumed (periodicity 0.1 m.y.). Hence, ... S. M. BERGSTROM, M.
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geology.geoscienceworld.org/cgi/content/abstract/28/11/...
geology.geoscienceworld.org/cgi/content/abstract/28/11/967
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"Seasonal weather patterns are shaped primarily by the 23.5 degree tilt of our planet's spin axis, not by the mild eccentricity of Earth's orbit," notes Lebo. "During northern summer the north pole is tilted toward the Sun. Days are long and the Sun is shining more nearly straight down -- that's what makes July so warm.
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science.nasa.gov/headlines/y2001/ast03jul_1.htm
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