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Thought you might be interested in this exotic solution of the 3 body problem in gravity - where the three bodies follow each other around a figure of eight route http://faculty.ifmo.ru/butikov/Proje...llection3.html
The Overview page... http://faculty.ifmo.ru/butikov/Projects/Collection.html .... shows other solutions, from different perspectives. |
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"palsing" wrote in message ...
Thought you might be interested in this exotic solution of the 3 body problem in gravity - where the three bodies follow each other around a figure of eight route http://faculty.ifmo.ru/butikov/Proje...llection3.html The Overview page... http://faculty.ifmo.ru/butikov/Projects/Collection.html .... shows other solutions, from different perspectives. ================================================== ========= Canals on Mars all over again: http://www.straitstimes.com/breaking...-suns-20121016 Astronomers see whatever they want to see |
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On Oct 18, 4:54*pm, palsing wrote:
Thought you might be interested in this exotic solution of the 3 body problem in gravity - where the three bodies follow each other around a figure of eight routehttp://faculty.ifmo.ru/butikov/Projects/Collection3.html The Overview page... http://faculty.ifmo.ru/butikov/Projects/Collection.html ... shows other solutions, from different perspectives. Let me see - "PHÆNOMENON IV. That the fixed stars being at rest, the periodic times of the five primary planets, and (whether of the sun about the earth, or) of the earth about the sun, are in the sesquiplicate proportion of their mean distances from the sun. This proportion, first observed by Kepler, is now received by all astronomers; for the periodic times are the same, and the dimensions of the orbits are the same, whether the sun revolves about the earth, or the earth about the sun " Newton The sun and planets around the Earth indeed !, the actual statement by Kepler is - "The proportion existing between the periodic times of any two planets is exactly the sesquiplicate proportion of the mean distances of the orbits, or as generally given,the squares of the periodic times are proportional to the cubes of the mean distances." Kepler What Isaac was trying to do was make celestial sphere geometry (fixed stars) a common denominator for his absolute/relative space and motion spiel and what I wouldn't give to find a genuine empiricist who could walk through the process as a man rather than hide behind contemporary voodoo.For everyone else,Kepler's proposal,although flawed, is easy enough to accept despite the initial unfamiliarity as it requires the usual spacial awareness when dealing with the relationship of individual orbits to each other and to the central Sun. "But it is absolutely certain and exact that the ratio which exists between the periodic times of any two planets is precisely the ratio of the 3/2th power of the mean distances, i.e., of the spheres themselves; provided, however, that the arithmetic mean between both diameters of the elliptic orbit be slightly less than the longer diameter. And so if any one take the period, say, of the Earth, which is one year, and the period of Saturn, which is thirty years, and extract the cube roots of this ratio and then square the ensuing ratio by squaring the cube roots, he will have as his numerical products the most just ratio of the distances of the Earth and Saturn from the sun. 1 For the cube root of 1 is 1, and the square of it is 1; and the cube root of 30 is greater than 3, and therefore the square of it is greater than 9. And Saturn, at its mean distance from the sun, is slightly higher than nine times the mean distance of the Earth from the sun." Kepler Do empiricists not wish to investigate geomagnetism,fluid dynamics,plate tectonics and all those other topics which require the amazing details supplied by contemporary data or do you still wish to live back in the late 17th century praising mathematicians who made a mess of things in exploiting astronomical intricacies inherent in genuine astronomy ?. The astronomical narrative is so unstable what with the next scam of exoplanet attributes while our own planet suffers from people who insist that it does not rotate 1461 times to the nearest rotation in proportion to 4 orbital circuits of the Sun. |
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