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Mechanical explanations of gravitation

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desired you would not ascribe 'innate gravity' to me. That gravity should be innate, inherent, and essential to matter, so that one body may act upon another at a distance, through a vacuum, without the mediation of anything else, by and through which their action and force may be conveyed from one to another, is to me so great an absurdity, that I believe no man who has in philosophical matters a competent faculty of thinking can ever fall into it. Gravity must be caused by an agent acting constantly according to certain laws; but whether this agent be material or immaterial, I have left to the consideration of my readers.
230:). He also posited that bodies must consist mostly of empty space so that the aether can penetrate the bodies easily, which is necessary for mass proportionality. He further concluded that the aether moves much faster than the falling bodies. At this time, Newton developed his theory of gravitation which is based on attraction, and although Huygens agreed with the mathematical formalism, he said the model was insufficient due to the lack of a mechanical explanation of the force law. Newton's discovery that gravity obeys the 201:—so due to the pressure of the condensed outer matter those parts will be pushed into the center of the vortex. According to Descartes, this inward pressure is nothing other than gravity. He compared this mechanism with the fact that if a rotating, liquid filled vessel is stopped, the liquid goes on to rotate. Now, if one drops small pieces of light matter (e.g. wood) into the vessel, the pieces move to the middle of the vessel. This idea on the formation of the cosmos by vortices of matter was preceded by the 283:, Newton wrote the following: “a condensation causing a flow of ether with a corresponding thinning of the ether density associated with the increased velocity of flow.” He also asserted that such a process was consistent with all his other work and Kepler's Laws of Motion. Newtons' idea of a pressure drop associated with increased velocity of flow was mathematically formalised as 142:
for mass proportionality, the theory posits that a) the basic elements of matter are very small so that gross matter consists mostly of empty space, and b) that the particles are so small, that only a small fraction of them would be intercepted by gross matter. The result is, that the "shadow" of each body is proportional to the surface of every single element of matter.
455: : To explain universal gravitation, one is forced to assume that all pulsations in the universe are in phase—which appears very implausible. In addition, the aether should be incompressible to ensure that attraction also arises at greater distances. And Maxwell argued that this process must be accompanied by a permanent new production and destruction of aether. 475:
assumed that the effect of the aether is proportional to the complete surface of the elementary components of which matter consists (similar to Huygens and Fatio before him). He also assumed an enormous penetrability of the bodies. However, no clear description was given by him as to how exactly the
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I have not as yet been able to discover the reason for these properties of gravity from phenomena, and I do not feign hypotheses. For whatever is not deduced from the phenomena must be called a hypothesis; and hypotheses, whether metaphysical or physical, or based on occult qualities, or mechanical,
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case of Descartes) a greater concentration of fine matter at the outer borders. So also in his model the fine matter presses the rough matter into the center of the vortex. Huygens also found out that the centrifugal force is equal to the force that acts in the direction of the center of the vortex (
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assumed that all bodies are exposed to pushes by aether particles from all directions, and that there is some sort of limitation at a certain distance from the Earth's surface which cannot be passed by the particles. He assumed that if a body is closer to the Earth than to the limitation boundary,
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This shadow obeys the inverse square law, because the imbalance of momentum flow over an entire spherical surface enclosing the object is independent of the size of the enclosing sphere, whereas the surface area of the sphere increases in proportion to the square of the radius. To satisfy the need
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speculated in 1671 that gravitation is the result of all bodies emitting waves in all directions through the aether. Other bodies, which interact with these waves, move in the direction of the source of the waves. Hooke saw an analogy to the fact that small objects on a disturbed surface of water
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between 1669 and 1690 designed a much more exact vortex model. This model was the first theory of gravitation which was worked out mathematically. He assumed that the aether particles are moving in every direction, but were thrown back at the outer borders of the vortex and this causes (as in the
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It is inconceivable that inanimate brute matter should, without the mediation of something else which is not material, operate upon and affect other matter, without mutual contact, as it must do if gravitation in the sense of Epicurus be essential and inherent in it. And this is one reason why I
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and normal matter represents sinks in this aether. So if the aether is destroyed or absorbed proportionally to the masses within the bodies, a stream arises and carries all surrounding bodies into the direction of the central mass. Riemann speculated that the absorbed aether is transferred into
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These mechanical explanations for gravity never gained widespread acceptance, although such ideas continued to be studied occasionally by physicists until the beginning of the twentieth century, by which time it was generally considered to be conclusively discredited. However, some researchers
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from 1859 to 1876. He calculated that the case of attraction occurs if the wavelength is large in comparison with the distance between the gravitating bodies. If the wavelength is small, the bodies repel each other. By a combination of these effects, he also tried to explain all other forces.
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but no net directional force. With a second object B present, however, a fraction of the particles that would otherwise have struck A from the direction of B is intercepted, so B works as a shield, so-to-speak—that is, from the direction of B, A will be struck by fewer particles than from the
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opposite direction. Likewise, B will be struck by fewer particles from the direction of A than from the opposite direction. One can say that A and B are "shadowing" each other, and the two bodies are pushed toward each other by the resulting imbalance of forces.
418:: Maxwell objected that this theory requires a steady production of waves, which must be accompanied by an infinite consumption of energy. Challis himself admitted, that he hadn't reached a definite result due to the complexity of the processes. 267:, developed a quite distinct approach. Whereas Descartes had outlined three species of matter – each linked respectively to the emission, transmission, and reflection of light – Thomson developed a theory based on a unitary continuum. 487:
of gases on gravitation. He assumed that the aether is heated by the bodies and loses density so that other bodies are pushed to these regions of lower density. However, it was shown by Taylor that the decreased density due to
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presupposed in 1760 that the gravitational aether loses density in accordance with the inverse square law. Similarly to others, Euler also assumed that to maintain mass proportionality, matter consists mostly of empty space.
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the resistance of the particle streams in the direction of motion, is a great problem too. This problem can be solved by assuming superluminal speeds, but this solution largely increases the thermal problems and contradicts
366:(1717) with another mechanical-ether theory of gravity. Unlike his first explanation (1675 – see Streams), he proposed a stationary aether which gets thinner and thinner nearby the celestial bodies. On the analogy of the 189:. The parts of this matter tend to move in straight paths, but because they lie close together, they cannot move freely, which according to Descartes implies that every motion is circular, so the aether is filled with 433:(1871) assumed that all bodies pulsate in the aether. This was in analogy to the fact that, if the pulsation of two spheres in a fluid is in phase, they will attract each other; and if the pulsation of two spheres is 343:
in 1888. Based on his aether stream model, which was similar to that of Riemann, he argued that the absorbed aether might be converted into new matter, leading to a mass increase of the celestial bodies.
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A rough English translation appeared in a U.S. government technical report: FTD TT64 323; TT 64 11801 (1964), Foreign Tech. Div., Air Force Systems Command, Wright-Patterson AFB, Ohio (reprinted in
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However, although he later proposed a second explanation (see section below), Newton's comments to that question remained ambiguous. In the third letter to Bentley in 1692 he wrote:
123:. The intensity of the flux of particles is assumed to be the same in all directions, so an isolated object A is struck equally from all sides, resulting in only an inward-directed 152:
reasons because a shadow only appears in this model if the particles or waves are at least partly absorbed, which should lead to an enormous heating of the bodies. Also drag,
1472: 1738: 197:, matter tends towards the outer edges of the vortex, which causes a condensation of this matter there. The rough matter cannot follow this movement due to its greater 193:. Descartes also distinguishes between different forms and sizes of matter in which rough matter resists the circular movement more strongly than fine matter. Due to 312:
have no place in experimental philosophy. In this philosophy particular propositions are inferred from the phenomena, and afterwards rendered general by induction.
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Adamut, I. A. (1982), "The screen effect of the earth in the TETG. Theory of a screening experiment of a sample body at the equator using the earth as a screen",
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the state of stress... which we must suppose to exist in the invisible medium, is 3000 times greater than that which the strongest steel could support
1768: 66:" hypotheses also attempt to describe gravity by more fundamental processes such as particle fields, but they are not based on classical mechanics. 2344: 370:, a force arises, which pushes all bodies to the central mass. He minimized drag by stating an extremely low density of the gravitational aether. 2017: 2272: 1831: 767:
I. Newton, letters quoted in detail in The Metaphysical Foundations of Modern Physical Science by Edwin Arthur Burtt, Double day Anchor Books.
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often move in different directions, against the direction of the vortex motion. Also, Huygens' explanation of the inverse square law is
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was studied by Radzievskii and Kagalnikova (1960), Shneiderov (1961), Buonomano and Engels (1976), Adamut (1982), and Edwards (2014).
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Buonomano, V. & Engel, E. (1976), "Some speculations on a causal unification of relativity, gravitation, and quantum mechanics",
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surprised Huygens and he tried to take this into account by assuming that the speed of the aether is smaller in greater distance.
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Matthew R. Edwards (2014). "Gravity from refraction of CMB photons using the optical-mechanical analogy in general relativity".
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Van Lunteren, F. (2002), "Nicolas Fatio de Duillier on the mechanical cause of Gravitation", in Edwards, M.R. (ed.),
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then the body would experience a greater push from above than from below, causing it to fall toward the Earth.
340: 202: 2125: 284: 2192: 484: 351: 205: 1993: 1903: 2109: 1581: 384:: Both Newton and Euler gave no reason why the density of that static aether should change. Furthermore, 2241: 2220: 2213: 2153: 85: 1778: 1274:
Mayeul Arminjon (2006). "Space Isotropy and Weak Equivalence Principle in a Scalar Theory of Gravity".
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Hypothese cinetique de la Gravitation universelle et connexion avec la formation des elements chimiques
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This theory is probably the best-known mechanical explanation, and was developed for the first time by
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Mayeul Arminjon (11 November 2004), "Gravity as Archimedes´ Thrust and a Bifurcation in that Theory",
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is compensated for by the increased speed of the heated particles; therefore, no attraction arises.
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is now the standard model to describe gravitation without the use of actions at a distance. Modern "
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Aiton, E.J. (1969), "Newton's Aether-Stream Hypothesis and the Inverse Square Law of Gravitation",
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must lead to noticeable deviations of the orbits which were not observed. Another problem was that
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in phase, they will repel each other. This mechanism was also used for explaining the nature of
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outside the scientific mainstream still try to work out some consequences of those theories.
17: 2336: 2030: 1924: 1695: 1685: 1654: 1594: 1458: 1400: 1366: 1340: 1301: 1249: 1196: 1192: 1154: 1112: 822: 798: 735: 635: 328: 54:. These theories were developed from the 16th until the 19th century in connection with the 2035: 1956: 1916: 1882: 1413: 982: 665: 464: 438: 354:. Also some drag must arise, and no process which leads to a creation of matter is known. 276: 93: 63: 55: 931: 1650: 1454: 1396: 1297: 1245: 1150: 1108: 1006: 706: 2235: 872: 446: 374: 241: 169: 149: 1580: 739: 256:. But a theory of gravitation has to explain those laws and must not presuppose them. 2390: 2172: 1841: 1676: 1543: 1473:"Ăśber die RĂĽckfĂĽhrung der Schwere auf Absorption und die daraus abgeleiteten Gesetze" 1208: 1166: 1124: 1024: 927: 480: 408: 1305: 1261: 2130: 1939: 1313: 788: 702: 400: 367: 280: 708:
Newton's Principia : the mathematical principles of natural philosophy (1687)
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Encyklopädie der Mathematischen Wissenschaften mit Einschluss ihrer Anwendungen
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Radzievskii, V.V. & Kagalnikova, I.I. (1960), "The nature of gravitation",
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Zehe, Horst (1980), "Die Gravitationstheorie des Nicolas Fatio de Duillier",
1609: 1462: 1404: 747: 647: 2318: 2300: 2104: 2081: 211: 1523: 1370: 574: 1716: 2375: 2185: 2178: 324:, Newton thought that gravitation is based directly on divine influence. 124: 120: 43: 1236: 1747: 1658: 1158: 1116: 208: 198: 35: 1288: 1076:
Shneiderov, A. J. (1961), "On the internal temperature of the earth",
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Pushing Gravity: New Perspectives on Le Sage's Theory of Gravitation
1582:"Comparative Review of some Dynamical Theories of Gravitation"  1438: 1380: 1354: 476:
aether interacts with matter so that the law of gravitation arises.
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http://www.newtonproject.ox.ac.uk/view/texts/normalized/THEM00258
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Gravity due to static pressure was recently studied by Arminjon.
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And according to the testimony of some of his friends, such as
1007:"On the Relation of the Amount of Material and Weight (1758)" 1439:"Ueber die Vermittelung der Fernewirkungen durch den Aether" 303:
On the other hand, Newton is also well known for the phrase
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Briefe an eine deutsche Prinzessin, Nr. 50, 30. August 1760
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Descartes, 1644; Zehe, 1980, pp. 65–70; Van Lunteren, p. 47
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Carrington, Hereward (1913), Sugden, Sherwood J. B (ed.),
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can exist and that space must consequently be filled with
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Proceedings of the Royal Philosophical Society of Glasgow
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Similar to Newton, but mathematically in greater detail,
621:"Leucippus and Democritus on Like to Like and ou mallon" 339:
Another attempt to solve the energy problem was made by
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in the late nineteenth century. However, the physicist,
1572:, London, New York: Nelson & Sons, pp. 246–253 1011:
Mikhail Vasil'evich Lomonosov on the Corpuscular Theory
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Notes of the Principles of Pure and Applied Calculation
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moving at high speed in all directions, throughout the
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P5: Permeability, attenuation and mass proportionality
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assumed in 1853 that the gravitational aether is an
2363: 2295: 2253: 2139: 2118: 2049: 1896: 1870: 1859: 1792: 1761: 1754: 724:"The Vortex Atom: A Victorian Theory of Everything" 407:A similar theory was worked out mathematically by 827:Bernhard Riemanns Werke und Gesammelter Nachlass 1544:"The Corpuscular Theories of Gravitation"  797:, General Scholium. Third edition, page 943 of 2041:Degenerate Higher-Order Scalar-Tensor theories 1013:, Cambridge: Harvard University Press: 224–233 388:pointed out that in this "hydrostatic" model " 1732: 1563: 903:Maxwell (1875, Attraction), Secondary sources 666:"Discours de la Cause de la Pesanteur (1690)" 664:(1944), SociĂ©tĂ© Hollaise des Sciences (ed.), 542:Taylor (1876), Peck (1903), secondary sources 483:tried to apply his co-developed model of the 8: 1628:, Montreal: C. Roy Keys Inc., pp. 41–59 1078:Bollettino di Geofisica Teorica ed Applicata 1054:Vsesoyuz. Astronom.-Geodezich. Obsch. 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O. 837: 831: 830: 819: 813: 799:I. Bernard Cohen 786: 780: 774: 768: 765: 759: 758: 756: 754: 719: 713: 712: 699: 690: 687: 678: 677: 658: 652: 651: 625: 616: 610: 607: 596: 593: 587: 586: 567: 561: 558: 552: 549: 543: 540: 505:Le Sage's theory 439:electric charges 329:Bernhard Riemann 38:by aid of basic 21: 2432: 2431: 2427: 2426: 2425: 2423: 2422: 2421: 2402:Aether theories 2387: 2386: 2385: 2380: 2359: 2335: 2328: 2299: 2297: 2287: 2268:Lovelock theory 2255: 2249: 2240: 2226: 2219: 2212: 2205: 2198: 2191: 2184: 2177: 2163: 2141: 2135: 2114: 2080: 2073: 2066: 2045: 2036:Induced gravity 2016: 2012:Scalar theories 1992: 1973: 1966: 1957:Massive gravity 1917:Teleparallelism 1915: 1910:Einstein–Cartan 1908: 1892: 1883:Quantum gravity 1862: 1861:Alternatives to 1851: 1817:Exact solutions 1788: 1750: 1745: 1715: 1710: 1684: 1669: 1634: 1623: 1606: 1578: 1561: 1540: 1518: 1499: 1481: 1470: 1436: 1412: 1378: 1352: 1330: 1326: 1321: 1282:(1B): 177–189. 1273: 1272: 1268: 1237:physics/0404103 1221: 1220: 1216: 1178: 1177: 1173: 1139:Nuovo Cimento C 1136: 1135: 1131: 1094: 1093: 1089: 1075: 1074: 1070: 1064:Pushing Gravity 1051: 1050: 1046: 1023: 1022: 1018: 1001: 1000: 996: 981: 980: 976: 971: 964: 959: 955: 938: 926: 925: 921: 916: 907: 902: 895: 889: 871: 870: 866: 849: 839: 838: 834: 821: 820: 816: 787: 783: 775: 771: 766: 762: 752: 750: 734:(1–2): 32–114. 721: 720: 716: 701: 700: 693: 688: 681: 660: 659: 655: 623: 618: 617: 613: 608: 599: 594: 590: 569: 568: 564: 559: 555: 550: 546: 541: 537: 533: 516: 498: 465:Pierre Varignon 461: 424: 398: 360: 358:Static pressure 279:, and later to 277:Henry Oldenburg 273: 167: 137: 94:Hendrik Lorentz 78: 72: 64:quantum gravity 23: 22: 15: 12: 11: 5: 2430: 2428: 2420: 2419: 2414: 2409: 2404: 2399: 2389: 2388: 2382: 2381: 2379: 2378: 2373: 2367: 2365: 2364:Related topics 2361: 2360: 2358: 2357: 2352: 2347: 2342: 2341: 2340: 2333: 2321: 2316: 2311: 2305: 2303: 2293: 2292: 2289: 2288: 2286: 2285: 2280: 2275: 2270: 2265: 2259: 2257: 2251: 2250: 2248: 2247: 2246: 2245: 2236:Twistor theory 2233: 2232: 2231: 2224: 2217: 2210: 2203: 2196: 2189: 2182: 2170: 2169: 2168: 2156: 2151: 2145: 2143: 2137: 2136: 2134: 2133: 2128: 2122: 2120: 2116: 2115: 2113: 2112: 2107: 2102: 2097: 2092: 2087: 2086: 2085: 2078: 2071: 2059: 2053: 2051: 2047: 2046: 2044: 2043: 2038: 2033: 2028: 2023: 2022: 2021: 2009: 2004: 1999: 1998: 1997: 1985: 1980: 1979: 1978: 1971: 1959: 1954: 1949: 1937: 1932: 1927: 1922: 1921: 1920: 1913: 1900: 1898: 1894: 1893: 1891: 1890: 1885: 1880: 1874: 1872: 1865: 1857: 1856: 1853: 1852: 1850: 1849: 1844: 1839: 1834: 1829: 1824: 1819: 1814: 1809: 1804: 1798: 1796: 1790: 1789: 1787: 1786: 1781: 1776: 1771: 1765: 1763: 1756: 1752: 1751: 1746: 1744: 1743: 1736: 1729: 1721: 1714: 1713: 1708: 1681: 1680: 1667: 1631: 1630: 1620: 1619: 1603: 1602: 1589:, 5th series, 1575: 1574: 1558: 1557: 1537: 1536: 1515: 1514: 1496: 1495: 1467: 1466: 1449:(9): 149–176, 1433: 1432: 1409: 1408: 1391:(12): I–XLIX, 1375: 1374: 1365:(3): 445–458, 1349: 1348: 1339:(3): 255–260, 1327: 1325: 1322: 1320: 1319: 1266: 1214: 1187:(2): 401–406. 1171: 1145:(2): 189–208, 1129: 1103:(3): 231–246, 1087: 1068: 1044: 1016: 994: 974: 962: 953: 919: 905: 893: 887: 864: 832: 814: 781: 769: 760: 714: 691: 679: 653: 634:(4): 446–468. 611: 597: 588: 562: 553: 544: 534: 532: 529: 528: 527: 522: 515: 512: 497: 494: 485:kinetic theory 460: 457: 447:Woldemar Voigt 423: 420: 397: 394: 375:Leonhard Euler 359: 356: 272: 269: 179:RenĂ© Descartes 166: 163: 135: 102:Henri PoincarĂ© 74:Main article: 71: 68: 24: 14: 13: 10: 9: 6: 4: 3: 2: 2429: 2418: 2415: 2413: 2410: 2408: 2405: 2403: 2400: 2398: 2395: 2394: 2392: 2377: 2374: 2372: 2369: 2368: 2366: 2362: 2356: 2353: 2351: 2348: 2346: 2343: 2338: 2334: 2331: 2330:Fatio–Le Sage 2327: 2326: 2325: 2322: 2320: 2317: 2315: 2312: 2310: 2307: 2306: 2304: 2302: 2296:Pre-Newtonian 2294: 2284: 2281: 2279: 2276: 2274: 2271: 2269: 2266: 2264: 2261: 2260: 2258: 2252: 2243: 2239: 2238: 2237: 2234: 2229: 2225: 2222: 2218: 2215: 2211: 2208: 2204: 2201: 2197: 2194: 2190: 2187: 2183: 2180: 2176: 2175: 2174: 2173:String theory 2171: 2166: 2162: 2161: 2160: 2157: 2155: 2152: 2150: 2147: 2146: 2144: 2138: 2132: 2129: 2127: 2124: 2123: 2121: 2117: 2111: 2108: 2106: 2103: 2101: 2098: 2096: 2093: 2091: 2088: 2083: 2079: 2076: 2072: 2069: 2065: 2064: 2063: 2060: 2058: 2055: 2054: 2052: 2048: 2042: 2039: 2037: 2034: 2032: 2029: 2027: 2024: 2019: 2015: 2014: 2013: 2010: 2008: 2005: 2003: 2000: 1995: 1991: 1990: 1989: 1986: 1984: 1981: 1976: 1972: 1969: 1965: 1964: 1963: 1960: 1958: 1955: 1953: 1950: 1948: 1946: 1942: 1938: 1936: 1933: 1931: 1928: 1926: 1923: 1918: 1914: 1911: 1907: 1906: 1905: 1902: 1901: 1899: 1895: 1889: 1886: 1884: 1881: 1879: 1876: 1875: 1873: 1869: 1866: 1864: 1858: 1848: 1845: 1843: 1842:ADM formalism 1840: 1838: 1835: 1833: 1830: 1828: 1825: 1823: 1820: 1818: 1815: 1813: 1810: 1808: 1805: 1803: 1800: 1799: 1797: 1795: 1791: 1785: 1782: 1780: 1777: 1775: 1772: 1770: 1767: 1766: 1764: 1760: 1757: 1753: 1749: 1742: 1737: 1735: 1730: 1728: 1723: 1722: 1719: 1711: 1705: 1701: 1697: 1693: 1692: 1687: 1683: 1682: 1678: 1674: 1670: 1668:3-8067-0862-2 1664: 1660: 1656: 1652: 1648: 1644: 1640: 1639: 1633: 1632: 1627: 1622: 1621: 1616: 1611: 1605: 1604: 1600: 1596: 1592: 1588: 1583: 1577: 1576: 1571: 1566: 1560: 1559: 1554: 1550: 1545: 1539: 1538: 1533: 1532: 1526: 1521: 1517: 1516: 1511: 1510: 1504: 1498: 1497: 1492: 1486: 1478: 1474: 1469: 1468: 1464: 1460: 1456: 1452: 1448: 1444: 1440: 1435: 1434: 1429: 1425: 1420: 1415: 1411: 1410: 1406: 1402: 1398: 1394: 1390: 1386: 1382: 1377: 1376: 1372: 1368: 1364: 1360: 1356: 1351: 1350: 1346: 1342: 1338: 1334: 1329: 1328: 1323: 1315: 1311: 1307: 1303: 1299: 1295: 1290: 1289:gr-qc/0412085 1285: 1281: 1277: 1270: 1267: 1263: 1259: 1255: 1251: 1247: 1243: 1238: 1233: 1229: 1225: 1218: 1215: 1210: 1206: 1202: 1198: 1194: 1190: 1186: 1182: 1175: 1172: 1168: 1164: 1160: 1156: 1152: 1148: 1144: 1140: 1133: 1130: 1126: 1122: 1118: 1114: 1110: 1106: 1102: 1098: 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373:Like Newton, 371: 369: 365: 357: 355: 353: 349: 345: 342: 337: 334: 330: 325: 323: 322:David Gregory 319: 313: 308: 306: 300: 295: 292: 290: 289:Hydrodynamica 286: 282: 278: 270: 268: 266: 262: 257: 255: 251: 247: 243: 239: 235: 233: 229: 224: 219: 217: 213: 210: 207: 204: 200: 196: 192: 188: 184: 180: 171: 164: 162: 160: 155: 151: 150:thermodynamic 147: 143: 133: 129: 126: 122: 118: 114: 110: 105: 103: 99: 95: 91: 87: 83: 77: 69: 67: 65: 61: 57: 53: 49: 45: 41: 37: 33: 29: 19: 2323: 2298:theories and 2131:Supergravity 1944: 1940: 1802:Introduction 1690: 1642: 1636: 1625: 1614: 1590: 1586: 1569: 1552: 1548: 1529: 1507: 1503:"Atom"  1476: 1446: 1442: 1427: 1423: 1388: 1384: 1362: 1358: 1336: 1332: 1279: 1275: 1269: 1227: 1223: 1217: 1184: 1180: 1174: 1142: 1138: 1132: 1100: 1096: 1090: 1081: 1077: 1071: 1063: 1057: 1053: 1047: 1038: 1032: 1025:Herapath, J. 1019: 1010: 997: 987: 983:Varignon, P. 977: 956: 932: 922: 877: 867: 844: 835: 826: 817: 812:, 974 pages. 792: 789:Isaac Newton 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Index

Descartes' vortex theory
gravity
mechanical
pressure
pushes
action at a distance
aether
general relativity
quantum gravity
Le Sage's theory of gravitation
Nicolas Fatio de Duillier
Georges-Louis Le Sage
Lord Kelvin
Hendrik Lorentz
James Clerk Maxwell
Henri Poincaré
force
particles
waves
universe
pressure

thermodynamic
special relativity

René Descartes
space
matter
vortices
centrifugal force

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