|
|
| (191 intermediate revisions by 2 users not shown) |
| Line 1: |
Line 1: |
| − | [[File:Atlas Holding Celestial Sphere.png|250px|right|thumb|Atlas Burdened to Carry the Heavens —''The Cosmographicall Glasse'']]It has been asserted many times, and with great insistence that astronomers can predict the positions of the bodies in the Solar System for any given time with the Round Earth Theory of the Solar System, and because of this, it is powerful evidence that the system of the Round Earth Theory is true. Kepler's Laws of Planetary Motion, with other Celestial Mechanics equations and resources, are presented as undeniable fact. They are presented to us that way in school, and so, it must be true. | + | #Redirect [[Three Body Problem]] |
| − | | |
| − | The system of the Round Earth Theory has been verified and validated through astronomical and mathematical prediction, as the story goes, and anyone who dares speak a word otherwise is a fool.
| |
| − | | |
| − | Readers of history and astronomy, however, will know that this is not how astronomers predict the location of bodies in the sky. The bodies are not predicted based on any heliocentric construct of the solar system and orbits. Prediction in astronomy is based solely on patterns in the sky. Celestial events come in patterns and trends. By analyzing the patterns from past behaviors from historic tables it is possible to create an equation that will predict a future event. This is how prediction in astronomy has been performed for thousands of years, and how it is still performed today.
| |
| − | | |
| − | Thomas Winship provides the following—
| |
| − | | |
| − | "Sir Richard Phillips in his Million Facts, says, 'Nothing therefore can be more impertinent than the assertion of modern writers that the accuracy of astronomical predictions arises from any modern theory. Astronomy is strictly a science of observation, and far more indebted to the false theory of Astrology, than to the equally false and fanciful theory of any modern.
| |
| − | | |
| − | We find that four or five thousand years ago, the mean motion of the Sun, Moon and Planets were known to a second, just as at present, and the moon's nodes, the latitudes of the planets, &c., were all adopted by Astrologers in preparing horoscopes for any time past or present. Ephemerides of the planet's places, of eclipses, &c., have been published for above 600 years, and were at first nearly as precise as at present.'"
| |
| − | | |
| − | The above quote speaks for itself.
| |
| − | | |
| − | It may come as a shock to learn that Celestial Mechanics cannot actually predict the placement of any body in the solar system at all. The many computer software applications that predict the locations of the planets are not doing so based on orbital motions in a heliocentric system. They are unable to.
| |
| − | | |
| − | We will look at works by professionals in the field who will explain why Celestial Mechanics cannot predict. Who better to consult than those who have labored to predict with the system?
| |
| − | | |
| − | ==Modern Celestial Mechanics==
| |
| − | | |
| − | <center>'''MODERN CELESTIAL MECHANICS'''<br>
| |
| − | ''Aspects of Solar System Dynamics''<br>
| |
| − | By Alessandro Morbidelli, PhD<br>
| |
| − | [https://lagrange.oca.eu/images/LAGRANGE/pages_perso/morby/celmech.pdf PDF Link]</center>
| |
| − | <br>
| |
| − | This book begins its introduction by describing Celestial Mechanics as a wonderful and successful tool for the ''theory'' of the structure and evolution of the Solar System.
| |
| − | | |
| − | From the first sentence:
| |
| − | | |
| − | {{Quote
| |
| − | |width=100%
| |
| − | |align=left
| |
| − | |boxalign=left
| |
| − | |quote=''In the last 20 years, Celestial Mechanics has achieved spectacular results on the structure and evolution of our Solar System.'
| |
| − | |source=Modern Celestial Mechanics}}
| |
| − | | |
| − | After the triumphing the success of theory to predict theory, the author, a Mathematician, provides a background on Celestial Mechanics and its ability to predict reality.
| |
| − | | |
| − | {{Quote
| |
| − | |width=100%
| |
| − | |align=left
| |
| − | |boxalign=center
| |
| − | |quote=''The first attempts to predict the motion of the planets in the sky date back to the dawn of civilization. However, what is now properly called Celestial Mechanics was born with Newton’s announcement (1687) of the law of universal gravitation. Since then, the computation of precise ephemerides has become essentially a mathematical challenge. Lagrange and Laplace particularly distinguished themselves in this search at the end of the XVIIIth century. To obtain increasing accuracy, they designed the first step of the theory of secular motion of planetary orbits, and the latter also understood the importance of a quasi-resonance between the orbital periods of Jupiter and Saturn. At that time, every apparent anomaly in planetary motion seemed to be accountable by a sufficiently accurate theory based on Newtonian gravitation. This success forged Laplace’s absolute faith in determinism, which then characterized the whole science of the XIXth century. The search for increasingly accurate analytic ephemerides has been continuing through the centuries up to the present time. But two centuries later than Laplace’s work – after the discovery of a new phenomenon called ''chaos'', the introduction of the first numerical methods for its detection and the construction of powerful computers – it was pointed out that the motion of the planets is in fact chaotic. Since then, a major goal of Celestial Mechanics has been to understand the reasons for this chaotic motion, and its consequences for the long-term evolution of the planetary system.'
| |
| − | |source=Modern Celestial Mechanics}}
| |
| − | | |
| − | We are informed reader that Celestial Mechanics is not, and has not been, successful at predicting the positions of planets.
| |
| − | | |
| − | A further definition is given for "chaotic":
| |
| − | | |
| − | {{Quote
| |
| − | |width=100%
| |
| − | |boxalign=center
| |
| − | |align=left
| |
| − | |quote=''the considered orbit is chaotic, if we intend the word ''chaos'' as a synonym for ''irregular and unpredictable behavior'''
| |
| − | |source=Modern Celestial Mechanics}}
| |
| − | | |
| − | Another description:
| |
| − | | |
| − | {{Quote
| |
| − | |width=100%
| |
| − | |boxalign=center
| |
| − | |align=left
| |
| − | |quote=''Because of the existence of chaos, which makes the motion unpredictable on timescales of several times the inverse of the Lyapunov exponent (5 My), the results of these integrations should be regarded only as representative of possible evolutions; however, as seen in the simple numerical examples of Chapter 4, numerical integrationmay give an indication of the extent of the chaotic region that is reachable over the integration time.'
| |
| − | |source=Modern Celestial Mechanics}}
| |
| − | | |
| − | ==Chaos and the Solar System==
| |
| − | | |
| − | The history of prediction in the solar system and the issue of chaos is provided in the following work by Paul Trow.
| |
| − | | |
| − | <center>'''Chaos and the Solar System'''<br>
| |
| − | by Paul Trow<br>
| |
| − | [http://ptrow.com/articles/ChaosandSolarSystem5.htm Article Link]</center>
| |
| − | | |
| − | {{Quote
| |
| − | |width=100%
| |
| − | |boxalign=center
| |
| − | |align=left
| |
| − | |quote=''What exactly is chaos? We can give an example by a rigid pendulum, such as in a grandfather clock. If the pendulum swings freely, its motion will be perfectly regular and periodic, and if there were no friction, it would continue this way forever. The system is perfectly predictable – it is the opposite of chaos. But now suppose that we place an electric magnet at the base of the pendulum, and arrange for the magnet turn on momentarily at regular intervals – say once every second – at which time it exerts a magnetic force on the pendulum. This device is rather like a parent pushing a child on a swing, but unlike the parent who pushes in time with the swing, the magnet’s forces are out of phase with the pendulum. If the magnet exerts its force during the pendulum’s downward swing, it speeds the pendulum up – but if it does so during the upward swing, it slows the pendulum down. The question is simply this: what will happen to the pendulum? Will it swing regularly or irregularly? Can we predict its motion at all?<br><br>Since the device is such a simple deterministic system, and the magnet’s push occurs at regular intervals, we might guess that the pendulum’s motion would be periodic. In other words, after a while the motion would begin to repeat itself. Surprisingly, what actually happens is that the pendulum begins to swing irregularly, sometimes higher and sometimes lower, without any discernible pattern. We are no more able to predict how high the pendulum will go after a few swings than we are to predict the outcome of a roll of the dice. What this device shows is that a simple deterministic mechanism can generate what appears to be random motion – in other words, it is chaotic.<br><br>There is a historical irony in the fact that this simple device is chaotic. Galileo studied the motion of freely swinging pendulums, and discovered that their period is independent of the length of the pendulum. Indeed, this discovery, along with his famous analysis of falling bodies and projectiles, were some of the first quantitative descriptions of terrestrial motion. Galileo’s work was one of the two most significant influences on Newton’s thinking. The irony is that something so simple as a pendulum – the very symbol of the deterministic universe – can be altered so slightly as to produce chaos. And the historical question this raises is why it took almost three hundred for someone to recognize the possibility of chaotic motion. I think it is safe to say that because Galileo and the other great genius of the scientific revolution were searching for order in the universe, they were blind to the existence of chaos all around them.'
| |
| − | |source=Chaos and the Solar System}}
| |
| − | | |
| − | The author goes on, describing that the motion of planetary systems has been an issue for a long time.
| |
| − | | |
| − | {{Quote
| |
| − | |width=100%
| |
| − | |boxalign=center
| |
| − | |align=left
| |
| − | |quote=''Describing the motion of any planetary system (including purely imaginary ones that exist only on paper) is the subject of a branch of mathematics called celestial mechanics. Its problems are extremely difficult and have eluded the greatest mathematicians in history.'
| |
| − | |source=Chaos and the Solar System}}
| |
| − |
| |
| − | The mathematician and theoretical physicist Henri Poincaré was instrumental in showcasing the challenges of celestial mechanics:
| |
| − | | |
| − | {{Quote
| |
| − | |width=100%
| |
| − | |boxalign=center
| |
| − | |align=left
| |
| − | |quote=''As other mathematicians had done before, Poincaré considered a special case in which there are just three planetary bodies (the so-called three-body problem). Poincaré, however, tried a novel approach to the problem: rather than trying to explicitly solve the equations of motion, as mathematicians had always done previously, he looked at the qualitative behavior of planetary orbits - for example, whether they were periodic or followed more irregular paths. This approach had a liberating effect, enabling him to see possibilities that others had overlooked. What he discovered was quite unexpected: the motion of a planet in a three-body system can be very wild and unpredictable indeed. Its orbit can follow an apparently random curve, winding back around itself over and over again, like a long and tangled string. As he described such curves:<br><br>When one tries to depict the figure formed by these two curves and their infinity of intersections, each of which corresponds to a doubly asymptotic solution, these intersections form a kind of net, web, or infinitely tight mesh; neither of the two curves can ever cross itself, but must fold back on itself in a very complex way … Nothing can give us a better idea of the complexity of the three-body problem.'
| |
| − | |source=Chaos and the Solar System}}
| |
| − | | |
| − | The article continues:
| |
| − | | |
| − | {{Quote
| |
| − | |width=100%
| |
| − | |boxalign=center
| |
| − | |align=left
| |
| − | |quote=''Poincaré’s discovery was surprising because it contradicted age-old assumptions about the motion of the planets. Beginning with the early Greeks, who thought that the planets moved in circles, astronomers had long believed that planetary motion was built up from simple motion. The theories of Kepler and Newton reinforced this belief. Before Poincaré, no one had imagined that such complicated, unpredictable motion could occur in the solar system. It must have come as a shock to him to realize that the motion of a planet could appear to be as random as that in a pinball machine.'
| |
| − | |source=Chaos and the Solar System}}
| |
| − | | |
| − | ==The Best of the Best==
| |
| − | | |
| − | To demonstrate the state-of-the-art methods for computing the motion of bodies in Celestial Mechanics, poliastro, an astrodynamics software developer, has shared this beautiful plot of several numerical methods for the restricted three body problem when applied to the Earth-Moon-Sun system taken from Harier et al. ''Solving Ordinary Differential Equations I''.
| |
| − | | |
| − | {{Quote
| |
| − | |width=100%
| |
| − | |boxalign=center
| |
| − | |align=left
| |
| − | |quote=''The use of high order Runge-Kutta methods is pervasive in Celestial Mechanics.'
| |
| − | |source=poliastro}}
| |
| − | | |
| − | When the three body problem solutions in Celestial Mechanics are applied to model the movement of the Moon in the Earth-Moon-Sun system we get the following:
| |
| − | | |
| − | [[File:Three Body Problem.jpg|600px|center]]
| |
| − | | |
| − | Arenstorf orbits are the knotted closed trajectories which are the result of restricted three-body problem solutions.
| |
| − | | |
| − | ==Conclusion==
| |
| − | | |
| − | As we have read, it is well admitted that Celestial Mechanics is not, and cannot, be used for the prediction of bodies in the solar system. The idea that it is used with success in astronomy software, and that astronomy books have the prediction of bodies in the heliocentric system pinned down to be able to predict bodies into the future is, to say the least, misinformed. Celestial prediction software such as ''Stellarium'' are not "Round Earth" or "Heliocentric" prediction tools. The efforts of hundreds of mathematicians and astronomers over thousands of years, from the early beginnings, have failed again and again to predict motion and positions in that system. It is an embarrassing stain on the whole of astronomy, mathematics, and classical mechanics. The above works call the inability to predict "chaos," but from this it takes little effort to transition into a questioning of the system and the science itself.
| |
| − | | |
| − | The Emerald City of prediction-proof that is used to showcase the factual reality of the Round Earth system, and its beauty, is revealed to be little more than a facade. When the Wizard's glasses are removed the city is no more green than any other city. The proprietor is handing out phony diplomas from his palace, and what surrounds the story is a dark secret.
| |
| − | | |
| − | The following comment left on our forum on this topic is succinct:
| |
| − | | |
| − | {{Quote
| |
| − | |width=100%
| |
| − | |boxalign=center
| |
| − | |align=left
| |
| − | |quote=''This point is a very powerful objection to astronomical theory in general, as opposed to observations. If all the movements of celestial bodies are simply predicted by tables based on observations of patterns, and if there is no simpler model available that explains these patterns, then there is no theory at all. We only have the observations.<br>This certainly deserves a separate thread. The whole project of science is based on taking complex observations, then elucidating a simpler theory or model that explains the observations. This is crucial.'
| |
| − | |source=edby}}
| |
| − | | |
| − | From the failure of theory to meet observation of reality, we are reminded of [http://www.sacred-texts.com/earth/za/za04.htm the following words by Samuel Birley Rowbotham]:
| |
| − | | |
| − | {{Quote
| |
| − | |width=100%
| |
| − | |boxalign=center
| |
| − | |align=left
| |
| − | |quote=''None can doubt that by making special experiments, and collecting manifest and undeniable facts, arranging them in logical order, and observing what is naturally and fairly deducible therefrom, the result must be more consistent and satisfactory than the contrary method of framing a theory or system--assuming the existence and operation of causes of which there is no direct and practical evidence, and which is only claimed to be "admitted for the sake of argument," and for the purpose of giving an apparent and plausible, but not necessarily truthful explanation of phenomena. All theories are of this character. "Supposing, instead of inquiring, imagining systems instead of learning from observation and experience the true constitution of things. Speculative men, by the force of genius may invent systems that will perhaps be greatly admired for a time; these, however, are phantoms which the force of truth will sooner or later dispel; and while we are pleased with the deceit, true philosophy with all the arts and improvements that depend upon it, suffers. The real state of things escapes our observation; or, if it presents itself to us, we are apt either to reject it wholly as fiction, or, by new efforts of a vain ingenuity to interweave it with our own conceits, and labour to make it tally with our favourite schemes. Thus, by blending together parts so ill-suited, the whole comes forth an absurd composition of truth and error. * * * These have not done near so much harm as that pride and ambition which has led philosophers to think it beneath them to offer anything less to the world than a complete and finished system of Nature; and, in order to obtain this at once, to take the liberty of inventing certain principles and hypotheses from which they pretend to explain all her mysteries."
| |
| − | | |
| − | "Theories are things of uncertain mode. They depend, in a great measure, upon the humour and caprice of an age, which is sometimes in love with one, and sometimes with another."
| |
| − | | |
| − | The system of Copernicus was admitted by its author to be merely an assumption, temporary and incapable of demonstration. The following are his words:--"It is not necessary that hypotheses should be true, or even probable; it is sufficient that they lead to results of calculation which agree with calculation. * * * Neither let anyone, so far as hypotheses are concerned, expect anything certain from astronomy, since that science can afford nothing of the kind, lest, in case he should adopt for truth, things feigned for another purpose, he should leave this science more foolish than he came. * * * The hypothesis of the terrestrial motion was nothing but an hypothesis, valuable only so far as it explained phenomena, and not considered with reference to absolute truth or falsehood."
| |
| − | | |
| − | The Newtonian and all other "views" and "systems" have the same general character as the "hypothesis of the terrestrial motion," framed by Copernicus. The foundations or premises are always unproved; no proof is ever attempted; the necessity for it is denied; it is considered sufficient that the assumptions seem to explain the phenomena selected. In this way it is that theory supplants theory, and system gives way to system, often in rapid succession, as one failure after another compels opinions to change. Until the practice of theorizing is universally relinquished, philosophy will continue to be looked upon by the bulk of mankind as a vain and mumbling pretension, antagonistic to the highest aspirations of humanity. Let there be adopted a true and practical free-thought method, with sequence as the only test of truth and consistency, and the philosopher may become the Priest of Science and the real benefactor of his species. "Honesty of thought is to look truth in the face, not in the side face, but in the full front; not merely to look at truth when found, but to seek it till found. There must be no tampering with conviction, no hedging or mental prevarication; no making 'the wish father to the thought;' no fearing to arrive at a particular result. To think honestly, then, is to think freely; freedom and honesty of thought are truly but interchangeable terms. For how can he think honestly, who dreads his being landed in this or that conclusion? Such as one has already predetermined in his heart how he shall think, and what he shall believe. Perfect truth, like perfect love, casteth out fear."
| |
| − | | |
| − | Let the method of simple inquiry--the "Zetetic" process be exclusively adopted--experiments tried and facts collected--not such only as corroborate an already existing state of mind, but of every kind and form bearing on the subject, before a conclusion is drawn, or a conviction affirmed.
| |
| − | | |
| − | "Nature speaks to us in a peculiar language; in the language of phenomena. She answers at all times the questions which are put to her; and such questions are experiments."'
| |
| − | |source=Samuel Birley Rowbotham, Earth Not a Globe}}
| |
| − | | |
| − | ==See Also:==
| |
| − | | |
| − | * [[NOAA Solar Calculator]]
| |
