The Principia Discordia states that her parents may be as described in Greek legend, or that she may be the daughter of Void.

Isaac Newton defined inertia as his first law in his Philosophiæ Naturalis Principia Mathematica, which states:

* The second edition of Isaac Newton's Principia Mathematica is published with an introduction by Roger Cotes and an essay by Newton titled General Scholium where he famously states " Hypotheses non fingo " (" I feign no hypotheses ").

The Principia Discordia states that " All things happen in fives, or are divisible by or are multiples of five, or are somehow directly or indirectly appropriate to 5 "— this is referred to as the Law of Fives.

Except for correspondence with Flamsteed we hear nothing more of the preparation of the Principia until April 21, 1686, when Halley read to the Royal Society his Discourse concerning Gravity and its Properties, in which he states " that his worthy countryman Mr Isaac Newton has an incomparable treatise of motion almost ready for the press ," and that the law of the inverse square " is the principle on which Mr Newton has made out all the phenomena of the celestial motions so easily and naturally, that its truth is past dispute.

Classical mechanics originated with Isaac Newton's laws of motion in Principia Mathematica, while quantum mechanics didn't appear until 1900.

Newton's 1687 Philosophiæ Naturalis Principia Mathematica provided a detailed mathematical account of mechanics, using the newly developed mathematics of calculus and providing the basis of Newtonian mechanics.

There is some dispute over priority of various ideas: Newton's Principia is certainly the seminal work and has been tremendously influential, and the systematic mathematics therein did not and could not have been stated earlier because calculus had not been developed.

An alternative anti-revolutionist view is that science as exemplified by Newton's Principia was anti-mechanist and highly Aristotelian, being specifically directed at the refutation of anti-Aristotelian Cartesian mechanism, as evidenced in the Principia quotations below, and not more empirical than it already was at the beginning of the century or earlier in the works of scientists such as Benedetti, Galileo Galilei, or Johannes Kepler.

Newton's work in his Principia dealt with this in a further example of unification, in this case unifying Galileo's work on terrestrial gravity, Kepler's laws of planetary motion and the phenomenon of tides by explaining them with one single law: the law of universal gravitation.

His lectures on modern art ( now known as the Paul Klee Notebooks ) at the Bauhaus have been compared for importance to Leonardo's Treatise on Painting and Newton's Principia Mathematica, constituting the Principia Aesthetica of a new era of art ;

Newton's own copy of his July 5th 1687 edition of Philosophiæ Naturalis Principia Mathematica ( or his Principia ), with hand-written corrections for the second edition.

Preceded by A Guide to Newton's Principia, by I. Bernard Cohen.

This was followed by a memoir on the theory of the tides, to which, conjointly with the memoirs by Euler and Colin Maclaurin, a prize was awarded by the French Academy: these three memoirs contain all that was done on this subject between the publication of Isaac Newton's Philosophiae Naturalis Principia Mathematica and the investigations of Pierre-Simon Laplace.

" A more recent assessment has been that while acceptance of Newton's theories was not immediate, by the end of a century after publication in 1687, " no one could deny that " ( out of the ' Principia ') " a science had emerged that, at least in certain respects, so far exceeded anything that had ever gone before that it stood alone as the ultimate exemplar of science generally.

The opening sections of the ' Principia ' contain, in revised and extended form, nearly all of the content of Newton's 1684 tract ' De motu ...' ( see article De motu corporum in gyrum which summarises the topics and indicates where they reappear in the ' Principia ').

Other evidence also shows Newton's absorption in the Principia: Newton for years kept up a regular programme of chemical or alchemical experiments, and he normally kept dated notes of them, but for a period from May 1684 to April 1686, Newton's chemical notebooks have no entries at all.

Isaac Newton | Newton's own first edition copy of his Principia, with handwritten corrections for the second edition.

This had some amendments relative to Newton's manuscript of 1685, mostly to remove cross-references that used obsolete numbering to cite the propositions of an early draft of Book 1 of the Principia.

Newton's heirs shortly afterwards published the Latin version in their possession, also in 1728, under the ( new ) title De Mundi Systemate, amended to update cross-references, citations and diagrams to those of the later editions of the Principia, making it look superficially as if it had been written by Newton after the Principia, rather than before.

In 1686, when the first book of Newton's ' Principia ' was presented to the Royal Society, Hooke claimed that Newton had obtained from him the " notion " of " the rule of the decrease of Gravity, being reciprocally as the squares of the distances from the Center ".

Several national rare-book collections contain original copies of Newton's Principia Mathematica, including:

File: GodfreyKneller-IsaacNewton-1689. jpg | Sir Isaac Newton ( 1642-1727 ): established three laws of motion and a law of universal gravitation in his Philosophiæ Naturalis Principia Mathematica ( 1687 ), laid foundations for classical mechanics, invented the reflecting telescope, observed that a prism splits white light into the colors of the visible spectrum, formulated a law of cooling, co-invented infinitesimal calculus

In the Axioms Scholium of his Principia Newton said its axiomatic three laws of motion were already accepted by mathematicians such as Huygens ( 1629 – 1695 ), Wallace, Wren and others, and also in memos in his draft preparations of the second edition of the Principia he attributed its first law of motion and its law of gravity to a range of historical figures.

In 1687, Sir Isaac Newton published his Principia, in which he outlined his laws of gravity and motion.

The ' Principia ' deals primarily with massive bodies in motion, initially under a variety of conditions and hypothetical laws of force in both non-resisting and resisting media, thus offering criteria to decide, by observations, which laws of force are operating in phenomena that may be observed.

Newton's First and Second laws, in Latin, from the original 1687 Philosophiæ Naturalis Principia Mathematica | Principia Mathematica.

* 1687-Isaac Newton publishes his Philosophiae Naturalis Principia Mathematica, in which he formulates Newton's laws of motion and Newton's law of universal gravitation

The Principia is a common name for the Philosophiæ Naturalis Principia Mathematica, Isaac Newton's three-volume work about his laws of motion and universal gravitation.

Isaac Newton published more general laws of celestial motion in his 1687 book, Philosophiæ Naturalis Principia Mathematica.

In 1687, Isaac Newton published Philosophiæ Naturalis Principia Mathematica, which provided an explanation for Kepler's laws in terms of universal gravitation and what came to be known as Newton's laws of motion.

* 1687: Isaac Newton published " Philosophiae Naturalis Principia Mathematica " which contains the Newton's laws of motion

* July 5-Isaac Newton's Principia ( full title Philosophiae Naturalis Principia Mathematica ) is published, in which Newton describes his theory of universal gravitation, explains the laws of mechanics, gives a formula for the speed of sound and demonstrates that Earth is an oblate spheroid.

In 1687, Newton published the Principia, detailing two comprehensive and successful physical theories: Newton's laws of motion, from which arise classical mechanics ; and Newton's law of universal gravitation, which describes the fundamental force of gravity.

Isaac Newton publishes his Philosophiae Naturalis Principia Mathematica, establishing the theory of gravitation and laws of motion.

The Principia explains Kepler's laws of planetary motion and allows astronomers to understand the forces acting between the Sun, the planets, and their moons.

Halley's visits to Newton in 1684 thus resulted from Halley's debates about planetary motion with Wren and Hooke, and they seem to have provided Newton with the incentive and spur to develop and write what became Philosophiae Naturalis Principia Mathematica ( Mathematical Principles of Natural Philosophy ).

After Isaac Newton published the Principia, navigation was transformed, because sailors could predict the motion of the moon and other celestial objects using Newton's theories of motion.

Around this time, Goddard read Newton's Principia Mathematica, and found that Newton's Third Law of Motion applied to motion in space.

( Newton's later first law of motion is to similar effect, Law 1 in the Principia.

This point reappears in Corollaries 1 and 2 to the third law of motion, Law 3 in the Principia.