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De motu corporum in gyrum

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if to whet Newton's interest, he asked what Newton thought about various matters, and then gave a whole list, mentioning "compounding the celestial motions of the planetts of a direct motion by the tangent and an attractive motion towards the central body", and "my hypothesis of the lawes or causes of springinesse", and then a new hypothesis from Paris about planetary motions (which Hooke described at length), and then efforts to carry out or improve national surveys, the difference of latitude between London and Cambridge, and other items. Newton replied with "a fansy of my own" about determining the Earth's motion, using a falling body. Hooke disagreed with Newton's idea of how the falling body would move, and a short correspondence developed.
638:, who suggested (again without demonstration) that there was a tendency towards the Sun like gravity or magnetism that would make the planets move in ellipses; but that the elements Hooke claimed were due either to Newton himself, or to other predecessors of them both such as Bullialdus and Borelli, but not Hooke. Wren and Halley were both skeptical of Hooke's claims, recalling an occasion when Hooke had claimed to have a derivation of planetary motions under an inverse square law, but had failed to produce it even under the incentive of a prize. 113: 421:: there is required the law of centripetal force tending to a focus of the ellipse." Here Newton finds the centripetal force to produce motion in this configuration would be inversely proportional to the square of the radius vector. (Translation: 'Therefore, the centripetal force is reciprocally as L X SP², that is, (reciprocally) in the doubled ratio of the distance ... .') This becomes Proposition 11 in the 576:, Newton did not specifically state a basis for extending the proofs to the converse. The proof of the converse here depends on its being apparent that there is a unique relation, i.e., that in any given setup, only one orbit corresponds to one given and specified set of force/velocity/starting position. Newton added a mention of this kind into the second edition of the 297:– a limit argument of infinitesimal calculus in geometric form, in which the area swept out by the radius vector is divided into triangle-sectors. They are of small and decreasing size considered to tend towards zero individually, while their number increases without limit.) This theorem appears again, with expanded explanation, as Proposition 1, Theorem 1, of the 596:'s visit to Newton in 1684 are known to us only from reminiscences of thirty to forty years later. According to one of these reminiscences, Halley asked Newton, "what he thought the Curve would be that would be described by the Planets supposing the force of attraction towards the Sun to be reciprocal to the square of their distance from it." 316:, and shows that for any given time-segment, the centripetal force (directed towards the center of the circle, treated here as a center of attraction) is proportional to the square of the arc-length traversed, and inversely proportional to the radius. (This subject reappears as Proposition 4, Theorem 4 in the 468:
shows that with a centripetal force inversely proportional to the square of the radius vector, the time of revolution of a body in an elliptical orbit with a given major axis is the same as it would be for the body in a circular orbit with the same diameter as that major axis. (Proposition 15 in the
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now evaluates the centripetal force in a non-circular orbit, using another geometrical limit argument, involving ratios of vanishingly small line-segments. The demonstration comes down to evaluating the curvature of the orbit as if it were made of infinitesimal arcs, and the centripetal force at any
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Hooke had started an exchange of correspondence in November 1679 by writing to Newton, to tell Newton that Hooke had been appointed to manage the Royal Society's correspondence. Hooke therefore wanted to hear from members about their researches, or their views about the researches of others; and as
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A significant scholarly controversy has existed over the question whether and how far these extensions to the converse, and the associated uniqueness statements, are self-evident and obvious or not. (There is no suggestion that the converses are not true, or that they were not stated by Newton, the
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demonstrates that where an orbiting body is subject only to a centripetal force, it follows that a radius vector, drawn from the body to the attracting center, sweeps out equal areas in equal times (no matter how the centripetal force varies with distance). (Newton uses for this derivation – as he
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Another version of the question was given by Newton himself, but also about thirty years after the event: he wrote that Halley, asking him "if I knew what figure the Planets described in their Orbs about the Sun was very desirous to have my Demonstration" In light of these differing reports, both
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as also proved. This has been seen as especially so in regard to 'Problem 3'. Newton's style of demonstration in all his writings was rather brief in places; he appeared to assume that certain steps would be found self-evident or obvious. In 'De Motu', as in the first edition of the
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explores the case of an ellipse, where the center of attraction is at its center, and finds that the centripetal force to produce motion in that configuration would be directly proportional to the radius vector. (This material becomes Proposition 10, Problem 5 in the
548:) the combined effects of resistance and a uniform centripetal force on motion towards/away from the center in a homogeneous medium. Both problems are addressed geometrically using hyperbolic constructions. These last two 'Problems' reappear in Book 2 of the 514:
then remarks that a bonus of this demonstration is that it allows definition of the orbits of comets and enables an estimation of their periods and returns where the orbits are elliptical. Some practical difficulties of implementing this are also discussed.
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is short enough to set out here the contents of its different sections. It contains 11 propositions, labelled as 'theorems' and 'problems', some with corollaries. Before reaching this core subject-matter, Newton begins with some preliminaries:
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of centripetal force, how to determine the orbital ellipse for a given starting position, speed, and direction of the orbiting body. Newton points out here, that if the speed is high enough, the orbit is no longer an ellipse, but is instead a
627:, and said Newton owed the idea of an inverse-square law of attraction to him – although at the same time, Hooke disclaimed any credit for the curves and trajectories that Newton had demonstrated on the basis of the inverse square law. 741:
The surviving copy in the Royal Society's register book was printed in S P Rigaud's 'Historical Essay' of 1838 (in the original Latin), but note that the title was added by Rigaud, and the original copy had no title: online, it is
648:, one of Newton's early and eminent successors in the field of gravitational studies, wrote after reviewing Hooke's work that it showed "what a distance there is between a truth that is glimpsed and a truth that is demonstrated". 432:
then points out that this Problem 3 proves that the planetary orbits are ellipses with the Sun at one focus. (Translation: 'The major planets orbit, therefore, in ellipses having a focus at the center of the Sun, and with their
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1 then explores the case of a circular orbit, assuming the center of attraction is on the circumference of the circle. A scholium points out that if the orbiting body were to reach such a center, it would then depart along the
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then points out that the Corollary 5 relation (square of orbital period proportional to cube of orbital size) is observed to apply to the planets in their orbits around the Sun, and to the Galilean satellites orbiting Jupiter.
851:(1994) 25(3), pp. 193–200 , concurring that Newton had given the outline of an argument; also D T Whiteside, Math. Papers vol. 6, p. 57; and Bruce Pourciau, "On Newton's proof that inverse-square orbits must be conics", 200:
1: Newton indicates that in the first 9 propositions below, resistance is assumed nil, then for the remaining (2) propositions, resistance is assumed proportional both to the speed of the body and to the density of the
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in November 1684. The manuscript was prompted by a visit from Halley earlier that year when he had questioned Newton about problems then occupying the minds of Halley and his scientific circle in London, including Sir
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Newton, who heard of this from Halley, rebutted Hooke's claim in letters to Halley, acknowledging only an occasion of reawakened interest. Newton did acknowledge some prior work of others, including
1792: 915:(1676–1687), (Cambridge University Press, 1960), giving the Hooke-Newton correspondence (of November 1679 to January 1679|80) at pp. 297–314, and the 1686 correspondence at pp. 431–448. 180:
and of Newton's first law (in the absence of external force, a body continues in its state of motion either at rest or in uniform motion along a straight line). (Definition 3 of the
453:, considered in corollary 5 to Theorem 1.) (A controversy over the cogency of the conclusion is described below.) The subject of Problem 3 becomes Proposition 11, Problem 6, in the 169:' (Newton originated this term, and its first occurrence is in this document) impels or attracts a body to some point regarded as a center. (This reappears in Definition 5 of the 1207: 227:
4: In the initial moments of effect of a centripetal force, the distance is proportional to the square of the time. (The context indicates that Newton was dealing here with
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Newton acknowledged in 1686 that an initial stimulus on him in 1679/80 to extend his investigations of the movements of heavenly bodies had arisen from correspondence with
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points out how problems 6 and 7 apply to the horizontal and vertical components of the motion of projectiles in the atmosphere (in this case neglecting earth curvature).
800:, that 'nearly all of it is of this calculus' ('lequel est presque tout de ce calcul'). See also D T Whiteside (1970), "The mathematical principles underlying Newton's 954:
Aspects of the controversy can be seen for example in the following papers: N Guicciardini, "Reconsidering the Hooke-Newton debate on Gravitation: Recent Results", in
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points out how problems 4 and 5 would apply to projectiles in the atmosphere and to the fall of heavy bodies, if the atmospheric resistance could be assumed nil.
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discusses the case of a degenerate elliptical orbit, amounting to a straight-line fall towards or ejection from the attracting center. (Proposition 32 in the
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The argument is also spelled out by Bruce Pourciau in "From centripetal forces to conic orbits: a path through the early sections of Newton's Principia",
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There has been scholarly controversy over exactly what if anything Newton really gained from Hooke, apart from the stimulus that Newton acknowledged.
1772: 962:, 10 (2005), 529–534; M Nauenberg, "Hooke's and Newton's Contributions to the Early Development of Orbital mechanics and Universal Gravitation", in 634:, who suggested (but without demonstration) that there was an attractive force from the Sun in the inverse square proportion to the distance, and 945:(1676–1687), (Cambridge University Press, 1960), giving the Halley-Newton correspondence of May to July 1686 about Hooke's claims at pp. 431–448. 499:. He also identifies a geometrical criterion for distinguishing between the elliptical case and the others, based on the calculated size of the 1110: 716: 81: 898:
Newton's note is now in the Cambridge University Library at MS Add.3968, f.101; and printed by I Bernard Cohen, in "Introduction to Newton's
220:. Newton treats them in effect as we now treat vectors. This point reappears in Corollaries 1 and 2 to the third law of motion, Law 3 in the 204:
2: By its intrinsic force (alone) every body would progress uniformly in a straight line to infinity unless something external hinders that.
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had been presented to the Royal Society, Hooke claimed from this correspondence the credit for some of Newton's content in the
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then points out how it is possible in this way to determine the centripetal force for any given shape of orbit and center.
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shows that, putting this in another way, the centripetal force is proportional to (1/P) * R where P is the orbital period.
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then points out that the centripetal force is proportional to V/R, where V is the orbital speed and R the circular radius.
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English translations are based on the third (1726) edition, and the first English translation, of 1729, as far as Book 1,
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points out how this enables determining the planetary ellipses and the locations of their foci by indirect measurements.
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At some points in 'De Motu', Newton depends on matters proved being used in practice as a basis for regarding their
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supposed.') (This conclusion is reached after taking as initial fact the observed proportionality between square of
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D T Whiteside (ed.), Mathematical Papers of Isaac newton, vol. 6 (1684–1691), (Cambridge University Press, 1974),
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point is evaluated from the speed and the curvature of the local infinitesimal arc. This subject reappears in the
1777: 1679: 1577: 1398: 1842: 450: 503:, as a proportion to the distance the orbiting body at closest approach to the center. (Proposition 17 in the 1662: 847:
For further discussion of the point see Curtis Wilson, in "Newton's Orbit Problem, A Historian's Response",
796:, whose 1696 book "Analyse des infiniment petits" (Infinitesimal analysis) stated in its preface, about the 413:
again explores the ellipse, but now treats the further case where the center of attraction is at one of its
1572: 793: 1767: 1626: 1423: 1517: 580:, as a Corollary to Propositions 11–13, in response to criticism of this sort made during his lifetime. 1567: 1562: 1485: 1388: 1354: 1317: 1176: 1063: 1837: 1532: 1448: 1847: 1403: 1344: 1327: 1312: 1257: 635: 1009:
not to be confused with several other Newtonian papers carrying titles that start with these words
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shows that if P is proportional to R, then the centripetal force would be proportional to 1/(R).
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Curtis Wilson: "From Kepler's Laws, so-called, to Universal Gravitation: Empirical Factors", in
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shows that if P is proportional to R, then the centripetal force would be proportional to 1/R.
217: 59: 1799: 1706: 1592: 1587: 1376: 1289: 1264: 1056: 822: 759: 689: 441:) drawn to the Sun describe areas proportional to the times, altogether (Latin: 'omnino') as 834:
The criticism is recounted by C Wilson in "Newton's Orbit Problem, A Historian's Response",
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shows that if P is proportional to R, then the centripetal force would be independent of R.
1713: 1433: 1190: 631: 8: 1832: 1522: 1502: 1418: 1408: 1269: 670: 262: 78:). After further encouragement from Halley, Newton went on to develop and write his book 1737: 1453: 1366: 1094: 775:
in its original 1687 edition is online in text-searchable form (in the original Latin)
665: 487: 1696: 1668: 1550: 1527: 1475: 1393: 1279: 1039: 1026: 722: 166: 117: 1656: 1632: 1608: 1438: 1184: 1038:, Vol. 6, pp. 30–91, ed. by D. T. Whiteside, Cambridge University Press, 1974 889:, Chapter 10, p. 403; giving the version of the question in John Conduitt's report. 568: 414: 251:
1: Newton briefly sets out continued products of proportions involving differences:
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1684 document by Isaac Newton containing mathematical derivations of Kepler's laws
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Finally in the series of propositions based on zero resistance from any medium,
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2: 'Inherent force' of a body is defined in a way that prepares for the idea of
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The Grip of Gravity: The Quest to Understand the Laws of Motion and Gravitation
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produced from old memories, it is hard to know exactly what words Halley used.
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This manuscript gave important mathematical derivations relating to the three
1816: 1732: 1614: 1556: 593: 544:) the effects of resistance on inertial motion in a straight line, and then ( 128: 71: 43: 112: 1620: 1490: 1299: 1274: 1237: 1079: 958:, 10 (2005), 511–517; Ofer Gal, "The Invention of Celestial Mechanics", in 609: 500: 269:
Then follows Newton's main subject-matter, labelled as theorems, problems,
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argument has been over whether Newton's proofs were satisfactory or not.)
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was recognized, both in Newton's lifetime and later, among others by the
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Lastly, Newton attempts to extend the results to the case where there is
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3: 'Resistance': the property of a medium that regularly impedes motion.
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or their limiting ratios.) This reappears in Book 1, Lemma 10 in the
75: 1284: 1225: 1048: 492: 66:" (before Newton's work, these had not been generally regarded as 1242: 1230: 1118: 657: 418: 389: 274: 258: 177: 1796: 254:
if A/(A–B) = B/(B–C) = C/(C–D) etc., then A/B = B/C = C/D etc.
29: 131:'s register book, and its (Latin) text is available online. 98:– of which nearly all of the content also reappears in the 70:). Halley reported the communication from Newton to the 1025:, by R. S. Westfall, Cambridge University Press, 1980 32:: "On the motion of bodies in an orbit"; abbreviated 1000:they found the original document documents, Only 1773:Statal Institute of Higher Education Isaac Newton 859:and inverse-square orbits: the flaw reexamined", 644:About thirty years after Newton's death in 1727, 1814: 874:Studies in the History and Philosophy of Science 987:(London and New York: Macmillan, 1893), p. 69. 562: 134:For ease of cross-reference to the contents of 937: 935: 933: 1064: 788:The content of infinitesimal calculus in the 146:in English translation, as well as in Latin. 930: 905: 714: 320:, and the corollaries here reappear also.) 99: 93: 87: 82:Philosophiæ Naturalis Principia Mathematica 79: 38:) is the presumed title of a manuscript by 33: 22: 1071: 1057: 1023:Never at rest: a biography of Isaac Newton 703:Archives for History of the Exact Sciences 239:Then follow two more preliminary points: 293:, as well as in many parts of the later 111: 1036:The Mathematical Papers of Isaac Newton 603: 312:considers a body moving uniformly in a 261:(to be understood: at the endpoints of 257:2: All parallelograms touching a given 1815: 1323:Newton's law of universal gravitation 1052: 943:Correspondence of Isaac Newton, Vol 2 913:Correspondence of Isaac Newton, Vol 2 92:) from a nucleus that can be seen in 1481:Newton's theorem of revolving orbits 1078: 806:Journal for the History of Astronomy 746:Isaaci Newtoni Propositiones De Motu 587: 1429:Leibniz–Newton calculus controversy 1170:standing on the shoulders of giants 819:Mathematical Papers of Isaac Newton 142:, there are online sources for the 13: 486:then explores, for the case of an 14: 1864: 127:was made by being entered in the 64:Kepler's laws of planetary motion 1758:Isaac Newton Group of Telescopes 927:vol. 2 already cited, at p. 297. 885:Quoted in Richard S. Westfall's 1828:Historical physics publications 1778:Newton International Fellowship 1459:generalized Gauss–Newton method 1372:Newton's method in optimization 1016: 985:An Essay on Newton's 'Principia 969: 948: 918: 892: 879: 866: 841: 828: 811: 715:Gondhalekar, Prabhakar (2005). 123:One of the surviving copies of 1003: 994: 782: 765: 752: 735: 721:. Cambridge University Press. 708: 695: 682: 619:Later, in 1686, when Newton's 1: 676: 289:does in later proofs in this 1399:Newton's theorem about ovals 563:Commentaries on the contents 460: 374:as Proposition 6 of Book 1. 361: 304: 280: 7: 1768:Sir Isaac Newton Sixth Form 1424:Corpuscular theory of light 1350:Schrödinger–Newton equation 849:College Mathematics Journal 836:College Mathematics Journal 651: 138:that appeared again in the 107: 10: 1869: 1177:Notes on the Jewish Temple 964:Early Science and Medicine 960:Early Science and Medicine 956:Early Science and Medicine 863:. 19(1) (1992), pp. 60–70. 838:(1994) 25(3), pp. 193–200 808:, vol. 1 (1970), 116–138 . 1786: 1723: 1678: 1601: 1543: 1298: 1218: 1153: 1086: 817:See D T Whiteside (ed.), 552:as Propositions 2 and 3. 150:De motu corporum in gyrum 24:De motu corporum in gyrum 1328:post-Newtonian expansion 1208:Corruptions of Scripture 1200:Ancient Kingdoms Amended 636:Giovanni Alfonso Borelli 417:. "A body orbits in an 392:. (Proposition 7 in the 1518:Absolute space and time 1382:truncated Newton method 1355:Newton's laws of motion 1318:Newton's law of cooling 876:, 38 (2007), pp. 56–83. 705:, 6 (1970), pp. 89–170. 216:3: Forces combine by a 86:(commonly known as the 1753:Isaac Newton Telescope 1743:Isaac Newton Institute 1513:Newton–Puiseux theorem 1508:Parallelogram of force 1496:kissing number problem 1486:Newton–Euler equations 1389:Gauss–Newton algorithm 1338:gravitational constant 821:, vol. 6 (1684–1691), 538:atmospheric resistance 184:is to similar effect.) 120: 100: 94: 88: 80: 34: 23: 1843:Works by Isaac Newton 1707:Isaac Newton Gargoyle 1617: (nephew-in-law) 1593:Copernican Revolution 1588:Scientific Revolution 1449:Newton–Cotes formulas 1313:Newton's inequalities 1290:Structural coloration 966:, 10 (2005), 518–528. 802:Principia Mathematica 794:Marquis de l'Hospital 540:, considering first ( 116:Diagram illustrating 115: 74:on 10 December 1684 ( 1714:Astronomers Monument 1404:Newton–Pepys problem 1377:Apollonius's problem 1345:Newton–Cartan theory 1258:Newton–Okounkov body 1191:hypotheses non fingo 1180: (c. 1680) 941:H W Turnbull (ed.), 911:H W Turnbull (ed.), 853:Annals of Science 48 604:Role of Robert Hooke 265:) are equal in area. 1523:Luminiferous aether 1471:Newton's identities 1444:Newton's cannonball 1419:Classical mechanics 1409:Newtonian potential 1270:Newtonian telescope 902:", 1971, at p. 293. 671:Classical mechanics 263:conjugate diameters 1748:Isaac Newton Medal 1553: (birthplace) 1367:Newtonian dynamics 1265:Newton's reflector 744:available here as 666:Christiaan Huygens 488:inverse-square law 218:parallelogram rule 121: 1810: 1809: 1702: (sculpture) 1669:Abraham de Moivre 1623: (professor) 1551:Woolsthorpe Manor 1503:Newton's quotient 1476:Newton polynomial 1434:Newton's notation 1165: (1661–1665) 980:W.W. Rouse Ball, 825:–57, footnote 73. 760:is available here 632:IsmaĂ«l Bullialdus 588:Halley's question 167:Centripetal force 118:centripetal force 1860: 1838:1680s in science 1798: 1693: (monotype) 1657:William Stukeley 1653: (disciple) 1633:Benjamin Pulleyn 1609:Catherine Barton 1528:Newtonian series 1439:Rotating spheres 1185:General Scholium 1080:Sir Isaac Newton 1073: 1066: 1059: 1050: 1049: 1010: 1007: 1001: 998: 981: 976: 967: 952: 946: 939: 928: 922: 916: 909: 903: 896: 890: 883: 877: 870: 864: 845: 839: 832: 826: 815: 809: 786: 780: 769: 763: 756: 750: 739: 733: 732: 712: 706: 699: 693: 686: 103: 97: 91: 85: 49:Christopher Wren 37: 26: 1868: 1867: 1863: 1862: 1861: 1859: 1858: 1857: 1848:1684 in science 1813: 1812: 1811: 1806: 1805: 1804: 1803: 1802: 1795: 1782: 1738:Newton's cradle 1719: 1674: 1647: (student) 1645:William Whiston 1641: (student) 1597: 1578:Religious views 1539: 1454:Newton's method 1414:Newtonian fluid 1308:Bucket argument 1294: 1214: 1149: 1082: 1077: 1019: 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1466:Newton fractal 1463: 1462: 1461: 1451: 1446: 1441: 1436: 1431: 1426: 1421: 1416: 1411: 1406: 1401: 1396: 1394:Newton's rings 1391: 1386: 1385: 1384: 1379: 1369: 1364: 1363: 1362: 1352: 1347: 1342: 1341: 1340: 1335: 1330: 1320: 1315: 1310: 1304: 1302: 1296: 1295: 1293: 1292: 1287: 1282: 1280:Newton's metal 1277: 1272: 1267: 1262: 1261: 1260: 1253:Newton polygon 1250: 1245: 1240: 1235: 1234: 1233: 1222: 1220: 1216: 1215: 1213: 1212: 1204: 1196: 1187:" (1713; 1181: 1173: 1166: 1157: 1155: 1154:Other writings 1151: 1150: 1148: 1147: 1139: 1131: 1123: 1115: 1107: 1099: 1090: 1088: 1084: 1083: 1076: 1075: 1068: 1061: 1053: 1047: 1046: 1033: 1018: 1015: 1012: 1011: 1002: 992: 991: 989: 988: 968: 947: 929: 925:Correspondence 917: 904: 891: 878: 865: 840: 827: 810: 781: 764: 751: 734: 728:978-0521018678 727: 707: 694: 680: 678: 675: 674: 673: 668: 653: 650: 605: 602: 589: 586: 564: 561: 462: 459: 447:orbital period 363: 360: 314:circular orbit 306: 303: 282: 279: 267: 266: 255: 252: 248: 247: 237: 236: 229:infinitesimals 225: 206: 205: 202: 197: 196: 189: 188: 185: 174: 162: 161: 109: 106: 62:now known as " 15: 9: 6: 4: 3: 2: 1865: 1854: 1851: 1849: 1846: 1844: 1841: 1839: 1836: 1834: 1831: 1829: 1826: 1824: 1823:Physics books 1821: 1820: 1818: 1801: 1797: 1789: 1785: 1779: 1776: 1774: 1771: 1769: 1766: 1764: 1761: 1759: 1756: 1754: 1751: 1749: 1746: 1744: 1741: 1739: 1736: 1734: 1733:Newton (unit) 1731: 1730: 1728: 1726: 1722: 1716: 1715: 1711: 1709: 1708: 1704: 1701: 1699: 1695: 1692: 1690: 1686: 1685: 1683: 1681: 1677: 1670: 1667: 1664: 1663:William Jones 1661: 1658: 1655: 1652: 1649: 1646: 1643: 1640: 1637: 1635: (tutor) 1634: 1631: 1628: 1625: 1622: 1619: 1616: 1615:John Conduitt 1613: 1611: (niece) 1610: 1607: 1606: 1604: 1600: 1594: 1591: 1589: 1586: 1584: 1581: 1579: 1576: 1574: 1571: 1569: 1566: 1564: 1561: 1558: 1557:Cranbury Park 1555: 1552: 1549: 1548: 1546: 1544:Personal life 1542: 1534: 1531: 1530: 1529: 1526: 1524: 1521: 1519: 1516: 1514: 1511: 1509: 1506: 1504: 1501: 1497: 1494: 1493: 1492: 1491:Newton number 1489: 1487: 1484: 1482: 1479: 1477: 1474: 1472: 1469: 1467: 1464: 1460: 1457: 1456: 1455: 1452: 1450: 1447: 1445: 1442: 1440: 1437: 1435: 1432: 1430: 1427: 1425: 1422: 1420: 1417: 1415: 1412: 1410: 1407: 1405: 1402: 1400: 1397: 1395: 1392: 1390: 1387: 1383: 1380: 1378: 1375: 1374: 1373: 1370: 1368: 1365: 1361: 1360:Kepler's laws 1358: 1357: 1356: 1353: 1351: 1348: 1346: 1343: 1339: 1336: 1334: 1333:parameterized 1331: 1329: 1326: 1325: 1324: 1321: 1319: 1316: 1314: 1311: 1309: 1306: 1305: 1303: 1301: 1297: 1291: 1288: 1286: 1283: 1281: 1278: 1276: 1273: 1271: 1268: 1266: 1263: 1259: 1256: 1255: 1254: 1251: 1249: 1246: 1244: 1241: 1239: 1236: 1232: 1229: 1228: 1227: 1224: 1223: 1221: 1219:Contributions 1217: 1210: 1209: 1205: 1202: 1201: 1197: 1194: 1192: 1186: 1182: 1179: 1178: 1174: 1172:" (1675) 1171: 1167: 1164: 1163: 1159: 1158: 1156: 1152: 1145: 1144: 1140: 1137: 1136: 1132: 1129: 1128: 1124: 1121: 1120: 1116: 1113: 1112: 1108: 1105: 1104: 1100: 1097: 1096: 1092: 1091: 1089: 1085: 1081: 1074: 1069: 1067: 1062: 1060: 1055: 1054: 1051: 1045: 1044:0-521-08719-8 1041: 1037: 1034: 1032: 1031:0-521-23143-4 1028: 1024: 1021: 1020: 1006: 997: 993: 986: 983: 982: 975: 974: 965: 961: 957: 951: 944: 938: 936: 934: 926: 921: 914: 908: 901: 895: 888: 887:Never at Rest 882: 875: 869: 862: 861:Historia Math 858: 854: 850: 844: 837: 831: 824: 820: 814: 807: 803: 799: 795: 791: 785: 778: 774: 768: 761: 755: 748: 747: 738: 730: 724: 720: 719: 711: 704: 698: 691: 685: 681: 672: 669: 667: 663: 659: 656: 655: 649: 647: 642: 639: 637: 633: 628: 626: 622: 617: 613: 611: 601: 597: 595: 594:Edmund Halley 585: 581: 579: 575: 570: 560: 558: 555:Then a final 553: 551: 547: 543: 539: 534: 532: 527: 525: 521: 516: 513: 508: 506: 502: 498: 494: 489: 485: 481: 479: 474: 472: 467: 458: 456: 452: 448: 444: 440: 436: 431: 426: 424: 420: 416: 412: 408: 406: 401: 397: 395: 391: 386: 382: 380: 375: 373: 368: 359: 356: 351: 349: 345: 343: 339: 337: 333: 331: 327: 325: 321: 319: 315: 311: 302: 300: 296: 292: 287: 278: 276: 272: 264: 260: 256: 253: 250: 249: 245: 242: 241: 240: 234: 230: 226: 223: 219: 215: 214: 213: 211: 203: 199: 198: 194: 191: 190: 186: 183: 179: 175: 172: 168: 164: 163: 159: 158:3 Definitions 156: 155: 154: 151: 147: 145: 141: 137: 132: 130: 129:Royal Society 126: 119: 114: 105: 102: 96: 90: 84: 83: 77: 73: 72:Royal Society 69: 65: 61: 56: 54: 50: 45: 44:Edmond Halley 41: 36: 31: 27: 25: 19: 1800:Isaac Newton 1712: 1705: 1697: 1688: 1621:Isaac Barrow 1559: (home) 1300:Newtonianism 1275:Newton scale 1238:Impact depth 1211: (1754) 1206: 1203: (1728) 1198: 1188: 1175: 1160: 1146: (1711) 1141: 1138: (1707) 1133: 1130: (1704) 1125: 1122: (1704) 1117: 1114: (1687) 1109: 1106: (1684) 1102: 1101: 1098: (1671) 1093: 1087:Publications 1035: 1022: 1017:Bibliography 1005: 996: 984: 978: 977: 973: 972: 963: 959: 955: 950: 942: 924: 920: 912: 907: 899: 894: 886: 881: 873: 868: 860: 856: 852: 848: 843: 835: 830: 818: 813: 805: 801: 797: 789: 784: 772: 767: 754: 745: 737: 717: 710: 702: 697: 684: 643: 640: 629: 624: 620: 618: 614: 612:in 1679/80. 610:Robert Hooke 607: 598: 591: 582: 577: 573: 566: 556: 554: 549: 545: 541: 535: 530: 528: 523: 519: 517: 511: 509: 504: 501:latus rectum 483: 482: 477: 475: 470: 465: 464: 454: 451:orbital size 449:and cube of 438: 434: 429: 427: 422: 410: 409: 404: 399: 398: 393: 384: 383: 378: 376: 371: 366: 365: 354: 352: 347: 346: 341: 340: 335: 334: 329: 328: 323: 322: 317: 309: 308: 298: 294: 290: 285: 284: 268: 243: 238: 232: 221: 209: 207: 193:4 Hypotheses 192: 181: 170: 157: 149: 148: 143: 139: 135: 133: 124: 122: 57: 53:Robert Hooke 40:Isaac Newton 21: 20: 18: 1700:by Paolozzi 1639:Roger Cotes 1248:Newton disc 1162:Quaestiones 1135:Arithmetica 348:Corollary 5 342:Corollary 4 336:Corollary 3 330:Corollary 2 324:Corollary 1 271:corollaries 1833:1684 works 1817:Categories 1787:Categories 1763:XMM-Newton 1680:Depictions 1651:John Keill 1573:Apple tree 1568:Later life 1563:Early life 1143:De Analysi 677:References 1602:Relations 1111:Principia 900:Principia 857:Principia 798:Principia 790:Principia 773:Principia 771:Newton's 662:Descartes 625:Principia 621:Principia 578:Principia 574:Principia 569:converses 550:Principia 546:Problem 7 542:Problem 6 524:Principia 520:Problem 5 505:Principia 497:hyperbola 484:Problem 4 471:Principia 466:Theorem 4 461:Theorem 4 455:Principia 423:Principia 411:Problem 3 405:Principia 400:Problem 2 394:Principia 379:corollary 372:Principia 367:Theorem 3 362:Theorem 3 318:Principia 310:Theorem 2 305:Theorem 2 299:Principia 295:Principia 286:Theorem 1 281:Theorem 1 233:Principia 222:Principia 210:Principia 182:Principia 171:Principia 144:Principia 140:Principia 101:Principia 89:Principia 76:Old Style 60:relations 1725:Namesake 1691:by Blake 1285:Spectrum 1226:Calculus 1195: ) 1095:Fluxions 652:See also 557:scholium 531:scholium 512:scholium 493:parabola 478:scholium 439:vectores 430:scholium 385:Problem 355:scholium 244:2 Lemmas 108:Contents 42:sent to 1243:Inertia 1231:fluxion 1127:Queries 1119:Opticks 1103:De Motu 658:Galileo 419:ellipse 390:tangent 291:De Motu 275:scholia 259:ellipse 201:medium. 178:inertia 136:De Motu 125:De Motu 95:De Motu 35:De Motu 1698:Newton 1689:Newton 1042:  1029:  823:pp. 56 725:  690:pp. 30 664:, and 443:Kepler 28:(from 1533:table 435:radii 30:Latin 1040:ISBN 1027:ISBN 777:here 723:ISBN 692:–91. 415:foci 273:and 165:1: ' 51:and 804:", 526:.) 507:.) 495:or 473:.) 407:.) 396:.) 212:.) 1819:: 932:^ 660:, 529:A 510:A 476:A 457:. 428:A 425:. 377:A 353:A 301:. 277:: 173:.) 104:. 55:. 1193:" 1189:" 1183:" 1168:" 1072:e 1065:t 1058:v 971:' 779:. 762:. 749:. 731:. 437:( 246:: 235:. 224:. 195:: 160::

Index

Latin
Isaac Newton
Edmond Halley
Christopher Wren
Robert Hooke
relations
Kepler's laws of planetary motion
scientific laws
Royal Society
Old Style
Philosophiæ Naturalis Principia Mathematica

centripetal force
Royal Society
Centripetal force
inertia
parallelogram rule
infinitesimals
ellipse
conjugate diameters
corollaries
scholia
circular orbit
tangent
foci
ellipse
Kepler
orbital period
orbital size
inverse-square law

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